diff --git a/Scripts/Garden/AdminValidation.js b/Scripts/Garden/AdminValidation.js
index 6511570..1cf775d 100644
--- a/Scripts/Garden/AdminValidation.js
+++ b/Scripts/Garden/AdminValidation.js
@@ -98,13 +98,29 @@ function ValidateAdminFunctionalEffects(
             );
         }
 
+        const EffectType = String(
+            Effect.Type ?? ""
+        ).trim();
+
         ValidateAdminKey(
-            String(
-                Effect.Type ?? ""
-            ).trim(),
+            EffectType,
             "Functional effect type"
         );
 
+        if (
+            typeof IsKnownFunctionalEffectType ===
+                "function" &&
+            !IsKnownFunctionalEffectType(
+                EffectType
+            )
+        ) {
+            throw new Error(
+                "Unknown functional effect type: " +
+                EffectType +
+                "."
+            );
+        }
+
         if (Effect.Key !== undefined) {
             const EffectKey = String(
                 Effect.Key ?? ""
@@ -175,16 +191,41 @@ function ValidateAdminFunctionalEffects(
                     "Functional effect amount must be a number."
                 );
             }
+
+            if (
+                [
+                    "GrowthAdvance",
+                    "MutationChanceBonus",
+                    "CooldownReduction",
+                    "HarvestYieldBonus"
+                ].includes(EffectType) &&
+                (Amount < 0 || Amount > 1)
+            ) {
+                throw new Error(
+                    "Functional percentage amounts must be between 0 and 1."
+                );
+            }
         }
 
-        if (
-            Effect.RequireMature !== undefined &&
-            typeof Effect.RequireMature !==
-                "boolean"
-        ) {
-            throw new Error(
-                "Functional effect RequireMature must be On or Off."
-            );
+        for (const BooleanField of [
+            "RequireMature",
+            "RequireMatureSource",
+            "RandomSource",
+            "RandomTarget",
+            "ExcludeFunctional",
+            "ConsumeSeed"
+        ]) {
+            if (
+                Effect[BooleanField] !== undefined &&
+                typeof Effect[BooleanField] !==
+                    "boolean"
+            ) {
+                throw new Error(
+                    "Functional effect " +
+                    BooleanField +
+                    " must be On or Off."
+                );
+            }
         }
 
         if (
diff --git a/Scripts/Garden/FunctionalEffects.js b/Scripts/Garden/FunctionalEffects.js
index 44b0c63..469a8ad 100644
--- a/Scripts/Garden/FunctionalEffects.js
+++ b/Scripts/Garden/FunctionalEffects.js
@@ -180,8 +180,40 @@ function GetResolvedFunctionalEffectCooldown(
     Effect,
     AtTime
 ) {
-    return GetFunctionalEffectCooldown(
-        Effect
+    const BaseCooldown =
+        GetFunctionalEffectCooldown(
+            Effect
+        );
+
+    if (BaseCooldown <= 0) {
+        return 0;
+    }
+
+    const Accelerator =
+        GetStrongestFunctionalEffectAffectingPlot(
+            SaveData,
+            GardenIndex,
+            PlotIndex,
+            "CooldownReduction",
+            AtTime
+        );
+
+    const Reduction = Math.max(
+        0,
+        Math.min(
+            1,
+            GetFunctionalEffectAmount(
+                Accelerator?.Effect
+            )
+        )
+    );
+
+    return Math.max(
+        FunctionalEffectMinimumCooldown,
+        Math.floor(
+            BaseCooldown *
+            (1 - Reduction)
+        )
     );
 }
 
@@ -1002,6 +1034,833 @@ function GetStrongestFunctionalEffectAffectingAnyPlot(
 }
 
 
+
+function DoesFunctionalPlantHaveEffectType(
+    Plant,
+    Type
+) {
+    return GetPlantFunctionalEffects(
+        Plant
+    ).some(
+        Effect =>
+            String(Effect.Type) ===
+            String(Type)
+    );
+}
+
+
+function CanFunctionalPlantUseAssignedSeed(
+    Plant
+) {
+    return DoesFunctionalPlantHaveEffectType(
+        Plant,
+        "Plant"
+    );
+}
+
+
+function GetFunctionalPercentageAmount(
+    Effect,
+    Fallback = 0
+) {
+    return Math.max(
+        0,
+        Math.min(
+            1,
+            GetFunctionalEffectAmount(
+                Effect,
+                Fallback
+            )
+        )
+    );
+}
+
+
+function GetFunctionalRandomItem(
+    SaveData,
+    Items
+) {
+    if (!Array.isArray(Items) || Items.length === 0) {
+        return null;
+    }
+
+    if (Items.length === 1) {
+        return Items[0];
+    }
+
+    const Random =
+        typeof GetSimulationRandom === "function"
+            ? GetSimulationRandom(
+                SaveData
+            )
+            : Math.random();
+
+    return Items[
+        Math.min(
+            Items.length - 1,
+            Math.floor(
+                Random * Items.length
+            )
+        )
+    ];
+}
+
+
+function AddFunctionalCurrencyReward(
+    SaveData,
+    Currency,
+    Amount
+) {
+    const RewardAmount = Number(
+        Amount
+    );
+
+    if (
+        !Number.isFinite(RewardAmount) ||
+        RewardAmount <= 0
+    ) {
+        return 0;
+    }
+
+    SaveData.Currency ??= {};
+    SaveData.Currency[Currency] ??= 0;
+    SaveData.Currency[Currency] += RewardAmount;
+
+    SaveData.Statistics ??= {};
+    SaveData.Statistics.CurrencyEarned ??= {};
+    SaveData.Statistics.CurrencyEarned[
+        Currency
+    ] ??= 0;
+    SaveData.Statistics.CurrencyEarned[
+        Currency
+    ] += RewardAmount;
+
+    return RewardAmount;
+}
+
+
+function IsGardenPlotHarvestDisabled(
+    SaveData,
+    GardenIndex,
+    PlotIndex,
+    AtTime
+) {
+    return (
+        GetStrongestFunctionalEffectAffectingPlot(
+            SaveData,
+            GardenIndex,
+            PlotIndex,
+            "DisableHarvest",
+            AtTime
+        ) !== null
+    );
+}
+
+
+function IsGardenPlotMutationDisabled(
+    SaveData,
+    GardenIndex,
+    PlotIndex,
+    AtTime
+) {
+    return (
+        GetStrongestFunctionalEffectAffectingPlot(
+            SaveData,
+            GardenIndex,
+            PlotIndex,
+            "DisableMutation",
+            AtTime
+        ) !== null
+    );
+}
+
+
+function DoesMutationPatternInvolveDisableMutation(
+    SaveData,
+    GardenIndex,
+    OriginX,
+    OriginY,
+    Pattern
+) {
+    const Garden =
+        GetFunctionalGarden(
+            SaveData,
+            GardenIndex
+        );
+
+    if (
+        Garden === null ||
+        !Array.isArray(Pattern)
+    ) {
+        return false;
+    }
+
+    for (
+        let LocalY = 0;
+        LocalY < Pattern.length;
+        LocalY++
+    ) {
+        const Row = Pattern[LocalY];
+
+        if (!Array.isArray(Row)) {
+            continue;
+        }
+
+        for (
+            let LocalX = 0;
+            LocalX < Row.length;
+            LocalX++
+        ) {
+            const Matcher = Row[LocalX];
+
+            if (
+                Matcher === null ||
+                Matcher === "Any" ||
+                Matcher === "Empty"
+            ) {
+                continue;
+            }
+
+            const PlotIndex =
+                GetFunctionalPlotIndex(
+                    Garden,
+                    OriginX + LocalX,
+                    OriginY + LocalY
+                );
+
+            if (PlotIndex === null) {
+                continue;
+            }
+
+            const Plot =
+                Garden.Plots?.[PlotIndex] ?? null;
+
+            if (Plot === null) {
+                continue;
+            }
+
+            const Plant =
+                Plants?.[Plot.Plant];
+
+            if (
+                Plant !== undefined &&
+                DoesFunctionalPlantHaveEffectType(
+                    Plant,
+                    "DisableMutation"
+                )
+            ) {
+                return true;
+            }
+        }
+    }
+
+    return false;
+}
+
+
+function GetGardenPlotGrowthAdvance(
+    SaveData,
+    GardenIndex,
+    PlotIndex,
+    AtTime
+) {
+    const Effect =
+        GetStrongestFunctionalEffectAffectingPlot(
+            SaveData,
+            GardenIndex,
+            PlotIndex,
+            "GrowthAdvance",
+            AtTime
+        );
+
+    return GetFunctionalPercentageAmount(
+        Effect?.Effect
+    );
+}
+
+
+function GetGardenPlotHarvestYieldBonus(
+    SaveData,
+    GardenIndex,
+    PlotIndex,
+    AtTime
+) {
+    const Effect =
+        GetStrongestFunctionalEffectAffectingPlot(
+            SaveData,
+            GardenIndex,
+            PlotIndex,
+            "HarvestYieldBonus",
+            AtTime
+        );
+
+    return GetFunctionalPercentageAmount(
+        Effect?.Effect
+    );
+}
+
+
+function PlantGardenPlot(
+    SaveData,
+    GardenIndex,
+    PlotIndex,
+    PlantKey,
+    AtTime,
+    Options = {}
+) {
+    const Garden =
+        GetFunctionalGarden(
+            SaveData,
+            GardenIndex
+        );
+
+    const Plant =
+        Plants?.[PlantKey];
+
+    if (
+        Garden === null ||
+        Plant === undefined ||
+        Garden.Plots?.[PlotIndex] !== null
+    ) {
+        return {
+            Changed: false,
+            Planted: false
+        };
+    }
+
+    const ConsumeSeed =
+        Options.ConsumeSeed === true;
+
+    if (ConsumeSeed) {
+        if (
+            typeof TakeSeed !== "function" ||
+            !TakeSeed(
+                SaveData,
+                Plant.Id,
+                1
+            )
+        ) {
+            return {
+                Changed: false,
+                Planted: false,
+                MissingSeed: true
+            };
+        }
+    }
+
+    const GrowthAdvance =
+        Options.ApplyGrowthAdvance === false
+            ? 0
+            : GetGardenPlotGrowthAdvance(
+                SaveData,
+                GardenIndex,
+                PlotIndex,
+                AtTime
+            );
+
+    const GrowthTime = Math.max(
+        0,
+        Number(
+            Plant.GrowthTime ?? 0
+        ) || 0
+    );
+
+    const PlantedAt =
+        Number(AtTime) -
+        GrowthTime * GrowthAdvance;
+
+    const Rotation =
+        FunctionalDirectionOffsets[
+            Options.Rotation
+        ] !== undefined
+            ? Options.Rotation
+            : "East";
+
+    Garden.Plots[PlotIndex] = {
+        Plant: PlantKey,
+        PlantedAt,
+        Rotation
+    };
+
+    return {
+        Changed: true,
+        Planted: true,
+        PlantKey,
+        PlotIndex,
+        GrowthAdvance,
+        PlantedAt
+    };
+}
+
+
+function HarvestGardenPlot(
+    SaveData,
+    GardenIndex,
+    PlotIndex,
+    AtTime,
+    Options = {}
+) {
+    const Garden =
+        GetFunctionalGarden(
+            SaveData,
+            GardenIndex
+        );
+
+    const Plot =
+        Garden?.Plots?.[PlotIndex] ?? null;
+
+    if (Plot === null) {
+        return {
+            Changed: false,
+            Harvested: false
+        };
+    }
+
+    const Plant =
+        Plants?.[Plot.Plant];
+
+    if (
+        Plant === undefined ||
+        !IsFunctionalPlantMatureAtTime(
+            Plot,
+            Plant,
+            AtTime
+        )
+    ) {
+        return {
+            Changed: false,
+            Harvested: false,
+            Immature: Plant !== undefined
+        };
+    }
+
+    if (
+        Options.ExcludeFunctional === true &&
+        IsFunctionalPlant(
+            Plant
+        )
+    ) {
+        return {
+            Changed: false,
+            Harvested: false,
+            Excluded: true
+        };
+    }
+
+    if (
+        IsGardenPlotHarvestDisabled(
+            SaveData,
+            GardenIndex,
+            PlotIndex,
+            AtTime
+        )
+    ) {
+        return {
+            Changed: false,
+            Harvested: false,
+            Disabled: true
+        };
+    }
+
+    const BaseReward =
+        typeof GetPlantHarvestReward === "function"
+            ? GetPlantHarvestReward(
+                SaveData,
+                Plant.Id
+            )
+            : null;
+
+    if (BaseReward === null) {
+        return {
+            Changed: false,
+            Harvested: false,
+            RewardUnavailable: true
+        };
+    }
+
+    const YieldBonus =
+        GetGardenPlotHarvestYieldBonus(
+            SaveData,
+            GardenIndex,
+            PlotIndex,
+            AtTime
+        );
+
+    const RewardAmount = Math.ceil(
+        BaseReward *
+        (1 + YieldBonus)
+    );
+
+    AddFunctionalCurrencyReward(
+        SaveData,
+        "Dew",
+        RewardAmount
+    );
+
+    Garden.Plots[PlotIndex] = null;
+
+    return {
+        Changed: true,
+        Harvested: true,
+        Plant,
+        PlantKey: Plot.Plant,
+        Rotation:
+            GetFunctionalPlotRotation(
+                Plot
+            ),
+        RewardAmount,
+        YieldBonus
+    };
+}
+
+
+function GetFunctionalEligibleSourceTargets(
+    SaveData,
+    Targets,
+    AtTime,
+    RequireMature = true
+) {
+    return Targets.filter(
+        Target => {
+            const Plot = Target.Plot;
+
+            if (Plot === null) {
+                return false;
+            }
+
+            const Plant =
+                Plants?.[Plot.Plant];
+
+            if (Plant === undefined) {
+                return false;
+            }
+
+            return (
+                !RequireMature ||
+                IsFunctionalPlantMatureAtTime(
+                    Plot,
+                    Plant,
+                    AtTime
+                )
+            );
+        }
+    );
+}
+
+
+function SelectFunctionalTarget(
+    SaveData,
+    Targets,
+    Random
+) {
+    if (Targets.length === 0) {
+        return null;
+    }
+
+    return Random === true
+        ? GetFunctionalRandomItem(
+            SaveData,
+            Targets
+        )
+        : Targets[0];
+}
+
+
+function HandleFunctionalHarvest(
+    Context
+) {
+    const Targets =
+        Context.GetTargets();
+
+    let Changed = false;
+
+    for (const Target of Targets) {
+        const Result =
+            HarvestGardenPlot(
+                Context.SaveData,
+                Target.GardenIndex,
+                Target.PlotIndex,
+                Context.AtTime,
+                {
+                    ExcludeFunctional:
+                        Context.Effect.ExcludeFunctional === true
+                }
+            );
+
+        Changed =
+            Changed ||
+            Result.Changed === true;
+    }
+
+    return {Changed};
+}
+
+
+function HandleFunctionalDuplicate(
+    Context
+) {
+    const SourceArea =
+        GetFunctionalEffectArea(
+            Context.Effect,
+            "Source",
+            "Behind"
+        );
+
+    const TargetArea =
+        GetFunctionalEffectArea(
+            Context.Effect,
+            "Target",
+            "Front"
+        );
+
+    const Sources =
+        GetFunctionalEligibleSourceTargets(
+            Context.SaveData,
+            GetFunctionalAreaTargets(
+                Context.SaveData,
+                Context.GardenIndex,
+                Context.PlotIndex,
+                SourceArea
+            ),
+            Context.AtTime,
+            Context.Effect.RequireMatureSource !== false
+        );
+
+    const EmptyTargets =
+        GetFunctionalAreaTargets(
+            Context.SaveData,
+            Context.GardenIndex,
+            Context.PlotIndex,
+            TargetArea
+        ).filter(
+            Target => Target.Plot === null
+        );
+
+    const Source =
+        SelectFunctionalTarget(
+            Context.SaveData,
+            Sources,
+            Context.Effect.RandomSource === true
+        );
+
+    const Target =
+        SelectFunctionalTarget(
+            Context.SaveData,
+            EmptyTargets,
+            Context.Effect.RandomTarget === true
+        );
+
+    if (
+        Source === null ||
+        Target === null
+    ) {
+        return {Changed: false};
+    }
+
+    return PlantGardenPlot(
+        Context.SaveData,
+        Context.GardenIndex,
+        Target.PlotIndex,
+        Source.Plot.Plant,
+        Context.AtTime,
+        {
+            ConsumeSeed: false
+        }
+    );
+}
+
+
+function HandleFunctionalPlant(
+    Context
+) {
+    const AssignedSeed =
+        typeof Context.Plot.AssignedSeed === "string"
+            ? Context.Plot.AssignedSeed
+            : null;
+
+    if (
+        AssignedSeed === null ||
+        Plants?.[AssignedSeed] === undefined
+    ) {
+        return {Changed: false};
+    }
+
+    const TargetArea =
+        GetFunctionalEffectArea(
+            Context.Effect,
+            "Target",
+            "Front"
+        );
+
+    const EmptyTargets =
+        GetFunctionalAreaTargets(
+            Context.SaveData,
+            Context.GardenIndex,
+            Context.PlotIndex,
+            TargetArea
+        ).filter(
+            Target => Target.Plot === null
+        );
+
+    const Target =
+        SelectFunctionalTarget(
+            Context.SaveData,
+            EmptyTargets,
+            Context.Effect.RandomTarget === true
+        );
+
+    if (Target === null) {
+        return {Changed: false};
+    }
+
+    return PlantGardenPlot(
+        Context.SaveData,
+        Context.GardenIndex,
+        Target.PlotIndex,
+        AssignedSeed,
+        Context.AtTime,
+        {
+            ConsumeSeed: true
+        }
+    );
+}
+
+
+function HandleFunctionalReplant(
+    Context
+) {
+    const Targets =
+        Context.GetTargets();
+
+    let Changed = false;
+
+    for (const Target of Targets) {
+        const ExistingPlot = Target.Plot;
+
+        if (ExistingPlot === null) {
+            continue;
+        }
+
+        const ExistingPlant =
+            Plants?.[ExistingPlot.Plant];
+
+        if (ExistingPlant === undefined) {
+            continue;
+        }
+
+        const ConsumeSeed =
+            Context.Effect.ConsumeSeed !== false;
+
+        if (
+            ConsumeSeed &&
+            (
+                typeof GetSeedCount !== "function" ||
+                GetSeedCount(
+                    Context.SaveData,
+                    ExistingPlant.Id
+                ) < 1
+            )
+        ) {
+            continue;
+        }
+
+        const Rotation =
+            GetFunctionalPlotRotation(
+                ExistingPlot
+            );
+
+        const HarvestResult =
+            HarvestGardenPlot(
+                Context.SaveData,
+                Target.GardenIndex,
+                Target.PlotIndex,
+                Context.AtTime,
+                {
+                    ExcludeFunctional:
+                        Context.Effect.ExcludeFunctional === true
+                }
+            );
+
+        if (!HarvestResult.Harvested) {
+            continue;
+        }
+
+        const PlantResult =
+            PlantGardenPlot(
+                Context.SaveData,
+                Target.GardenIndex,
+                Target.PlotIndex,
+                HarvestResult.PlantKey,
+                Context.AtTime,
+                {
+                    ConsumeSeed,
+                    Rotation
+                }
+            );
+
+        Changed =
+            Changed ||
+            HarvestResult.Changed === true ||
+            PlantResult.Changed === true;
+    }
+
+    return {Changed};
+}
+
+
+function SetFunctionalPlantAssignedSeed(
+    Plot,
+    PlantKey
+) {
+    if (
+        Plot === null ||
+        typeof Plot !== "object" ||
+        Plants?.[PlantKey] === undefined
+    ) {
+        return false;
+    }
+
+    Plot.AssignedSeed = PlantKey;
+    return true;
+}
+
+
+function ClearFunctionalPlantAssignedSeed(
+    Plot
+) {
+    if (
+        Plot === null ||
+        typeof Plot !== "object"
+    ) {
+        return false;
+    }
+
+    delete Plot.AssignedSeed;
+    return true;
+}
+
+
+RegisterFunctionalEffectHandler(
+    "Harvest",
+    HandleFunctionalHarvest
+);
+
+RegisterFunctionalEffectHandler(
+    "Duplicate",
+    HandleFunctionalDuplicate
+);
+
+RegisterFunctionalEffectHandler(
+    "Plant",
+    HandleFunctionalPlant
+);
+
+RegisterFunctionalEffectHandler(
+    "Replant",
+    HandleFunctionalReplant
+);
+
+
 function CreateFunctionalProcessingResult() {
     return {
         Attempted: false,
diff --git a/Scripts/Garden/Garden.js b/Scripts/Garden/Garden.js
index b0ec523..a4b0e9a 100644
--- a/Scripts/Garden/Garden.js
+++ b/Scripts/Garden/Garden.js
@@ -2185,28 +2185,27 @@ async function PlantSeed(
     }
 
 
-    if (
-        !TakeSeed(
+    const PlantResult =
+        PlantGardenPlot(
             GameSave,
-            SelectedSeedId
-        )
-    ) {
+            GameSave.ActiveGardenIndex,
+            PlotIndex,
+            PlantKey,
+            ActionTime,
+            {
+                ConsumeSeed: true,
+                Rotation:
+                    GardenPlotDefaultRotation
+            }
+        );
+
+    if (!PlantResult.Planted) {
         EnsureSelectedSeed();
         RenderSeeds();
-
         return;
     }
 
 
-    GameSave.Garden.Plots[
-        PlotIndex
-    ] = {
-        Plant: PlantKey,
-        PlantedAt: ActionTime,
-        Rotation: GardenPlotDefaultRotation
-    };
-
-
     SetGardenMessage(
         "Planted " +
         Plant.Name +
@@ -2307,40 +2306,47 @@ async function PlantManySeeds() {
     }
 
 
-    if (
-        !TakeSeed(
-            GameSave,
-            SelectedSeedId,
-            PlantCount
-        )
-    ) {
-        return;
-    }
-
-
-    const PlantedAt = ActionTime;
+    let PlantedCount = 0;
 
     for (
         let Index = 0;
         Index < PlantCount;
         Index++
     ) {
-        GameSave.Garden.Plots[
-            EmptyPlotIndexes[Index]
-        ] = {
-            Plant: PlantKey,
-            PlantedAt: PlantedAt,
-            Rotation: GardenPlotDefaultRotation
-        };
+        const PlantResult =
+            PlantGardenPlot(
+                GameSave,
+                GameSave.ActiveGardenIndex,
+                EmptyPlotIndexes[Index],
+                PlantKey,
+                ActionTime,
+                {
+                    ConsumeSeed: true,
+                    Rotation:
+                        GardenPlotDefaultRotation
+                }
+            );
+
+        if (!PlantResult.Planted) {
+            break;
+        }
+
+        PlantedCount++;
+    }
+
+    if (PlantedCount <= 0) {
+        EnsureSelectedSeed();
+        RenderSeeds();
+        return;
     }
 
 
     SetGardenMessage(
         "Magic trowel planted " +
-        PlantCount.toLocaleString() +
+        PlantedCount.toLocaleString() +
         " " +
         Plant.Name +
-        (PlantCount === 1
+        (PlantedCount === 1
             ? " seed."
             : " seeds.")
     );
@@ -2391,38 +2397,40 @@ async function HarvestPlant(
     }
 
 
-    const RewardAmount =
-        GetPlantHarvestReward(
+    const HarvestResult =
+        HarvestGardenPlot(
             GameSave,
-            Plant.Id
+            GameSave.ActiveGardenIndex,
+            PlotIndex,
+            ActionTime
         );
 
-    if (RewardAmount === null) {
-        SetGardenMessage(
-            "Couldn't calculate the harvest reward for " +
-            Plant.Name +
-            "."
-        );
+    if (!HarvestResult.Harvested) {
+        if (HarvestResult.Disabled) {
+            SetGardenMessage(
+                Plant.Name +
+                " can't be harvested right now."
+            );
+        } else if (
+            HarvestResult.RewardUnavailable
+        ) {
+            SetGardenMessage(
+                "Couldn't calculate the harvest reward for " +
+                Plant.Name +
+                "."
+            );
+        }
 
+        RenderGame();
         return;
     }
 
 
-    GiveReward({
-        Currency: "Dew",
-        Amount: RewardAmount
-    });
-
-    GameSave.Garden.Plots[
-        PlotIndex
-    ] = null;
-
-
     SetGardenMessage(
         "Harvested " +
         Plant.Name +
         " for " +
-        RewardAmount +
+        HarvestResult.RewardAmount +
         " Dew."
     );
 
diff --git a/Scripts/Garden/MutationEngine.js b/Scripts/Garden/MutationEngine.js
index b29a76d..31b7823 100644
--- a/Scripts/Garden/MutationEngine.js
+++ b/Scripts/Garden/MutationEngine.js
@@ -131,7 +131,7 @@ function CheckGardenMutations(
             );
 
 
-            const Chance = Math.max(
+            const BaseChance = Math.max(
                 0,
                 Math.min(
                     Number(
@@ -142,6 +142,31 @@ function CheckGardenMutations(
                 )
             );
 
+            const Catalyst =
+                typeof GetStrongestFunctionalEffectAffectingAnyPlot ===
+                    "function"
+                    ? GetStrongestFunctionalEffectAffectingAnyPlot(
+                        SaveData,
+                        SaveData.ActiveGardenIndex ?? 0,
+                        Candidate.Cells,
+                        "MutationChanceBonus",
+                        AtTime
+                    )
+                    : null;
+
+            const CatalystBonus =
+                typeof GetFunctionalPercentageAmount ===
+                    "function"
+                    ? GetFunctionalPercentageAmount(
+                        Catalyst?.Effect
+                    )
+                    : 0;
+
+            const Chance = Math.min(
+                1,
+                BaseChance + CatalystBonus
+            );
+
 
             const Succeeded =
                 GetSimulationRandom(
@@ -386,6 +411,42 @@ function CreateMutationCandidate(
     }
 
 
+    const GardenIndex =
+        Math.max(
+            0,
+            Number(
+                SaveData.ActiveGardenIndex ?? 0
+            ) || 0
+        );
+
+    if (
+        typeof IsGardenPlotMutationDisabled ===
+            "function" &&
+        Cells.some(
+            PlotIndex =>
+                IsGardenPlotMutationDisabled(
+                    SaveData,
+                    GardenIndex,
+                    PlotIndex,
+                    AtTime
+                )
+        ) &&
+        !(
+            typeof DoesMutationPatternInvolveDisableMutation ===
+                "function" &&
+            DoesMutationPatternInvolveDisableMutation(
+                SaveData,
+                GardenIndex,
+                OriginX,
+                OriginY,
+                Orientation.Pattern
+            )
+        )
+    ) {
+        return null;
+    }
+
+
     return {
         Mutation: Mutation,
 
@@ -789,6 +850,23 @@ function ApplyMutationResult(
                         : "East";
             }
 
+            if (
+                NewPlot !== null &&
+                typeof NewPlot === "object" &&
+                ExistingPlot !== null &&
+                typeof ExistingPlot === "object" &&
+                typeof ExistingPlot.AssignedSeed ===
+                    "string" &&
+                typeof CanFunctionalPlantUseAssignedSeed ===
+                    "function" &&
+                CanFunctionalPlantUseAssignedSeed(
+                    Plants?.[NewPlot.Plant]
+                )
+            ) {
+                NewPlot.AssignedSeed =
+                    ExistingPlot.AssignedSeed;
+            }
+
 
             SaveData.Garden.Plots[
                 PlotIndex
diff --git a/Scripts/Garden/Save.js b/Scripts/Garden/Save.js
index 6760195..c7cc003 100644
--- a/Scripts/Garden/Save.js
+++ b/Scripts/Garden/Save.js
@@ -288,6 +288,17 @@ function NormalizeGardenData(
                 ? Plot.Rotation
                 : "East";
 
+        if (
+            typeof Plot.AssignedSeed ===
+                "string" &&
+            Plot.AssignedSeed.trim().length > 0
+        ) {
+            Plot.AssignedSeed =
+                Plot.AssignedSeed.trim();
+        } else {
+            delete Plot.AssignedSeed;
+        }
+
         if (
             Plot.FunctionalCooldowns === null ||
             typeof Plot.FunctionalCooldowns !==
diff --git a/Scripts/Garden/Simulation.js b/Scripts/Garden/Simulation.js
index 59909a2..8898922 100644
--- a/Scripts/Garden/Simulation.js
+++ b/Scripts/Garden/Simulation.js
@@ -1,5 +1,6 @@
 const SimulationMinimumEventInterval = 1000;
 const MaximumSimulationSteps = 250000;
+const MaximumSimulationSameTimePasses = 100;
 
 
 function GetSimulationTime(
@@ -410,31 +411,47 @@ function AdvanceGameSimulation(
     ) {
         Result.Steps = Step + 1;
 
-        const MutationResult =
-            CheckAllGardenMutationsAtTime(
-                SaveData,
-                CurrentTime
-            );
-
-        MergeSimulationMutationResult(
-            Result,
-            MutationResult
-        );
-
-        if (
-            typeof ProcessFunctionalEffectsAtTime ===
-                "function"
+        for (
+            let SameTimePass = 0;
+            SameTimePass <
+                MaximumSimulationSameTimePasses;
+            SameTimePass++
         ) {
-            const FunctionalResult =
-                ProcessFunctionalEffectsAtTime(
+            const MutationResult =
+                CheckAllGardenMutationsAtTime(
                     SaveData,
                     CurrentTime
                 );
 
-            MergeSimulationFunctionalResult(
+            MergeSimulationMutationResult(
                 Result,
-                FunctionalResult
+                MutationResult
             );
+
+            let FunctionalResult = null;
+
+            if (
+                typeof ProcessFunctionalEffectsAtTime ===
+                    "function"
+            ) {
+                FunctionalResult =
+                    ProcessFunctionalEffectsAtTime(
+                        SaveData,
+                        CurrentTime
+                    );
+
+                MergeSimulationFunctionalResult(
+                    Result,
+                    FunctionalResult
+                );
+            }
+
+            if (
+                MutationResult.Changed !== true &&
+                FunctionalResult?.Changed !== true
+            ) {
+                break;
+            }
         }
 
         if (CurrentTime >= SafeTargetTime) {