diff --git a/code/modules/events/spacevine.dm b/code/modules/events/spacevine.dm
index 583013f7ea0..20beda3422f 100644
--- a/code/modules/events/spacevine.dm
+++ b/code/modules/events/spacevine.dm
@@ -333,8 +333,8 @@
 		if(!master.vines.len)
 			var/obj/item/seeds/kudzu/KZ = new(loc)
 			KZ.mutations |= mutations
-			KZ.potency = min(100, master.mutativeness * 10)
-			KZ.production = (master.spread_cap / initial(master.spread_cap)) * 5
+			KZ.set_potency(master.mutativeness * 10)
+			KZ.set_production((master.spread_cap / initial(master.spread_cap)) * 5)
 	mutations = list()
 	set_opacity(0)
 	if(buckled_mob)
diff --git a/code/modules/hydroponics/grown/kudzu.dm b/code/modules/hydroponics/grown/kudzu.dm
index e417d1868a5..72edae138bc 100644
--- a/code/modules/hydroponics/grown/kudzu.dm
+++ b/code/modules/hydroponics/grown/kudzu.dm
@@ -54,7 +54,7 @@
 		for(var/datum/spacevine_mutation/SM in mutations)
 			if(SM.quality == NEGATIVE)
 				temp_mut_list += SM
-		if(prob(20))
+		if(prob(20) && temp_mut_list.len)
 			mutations.Remove(pick(temp_mut_list))
 		temp_mut_list.Cut()
 
@@ -62,7 +62,7 @@
 		for(var/datum/spacevine_mutation/SM in mutations)
 			if(SM.quality == POSITIVE)
 				temp_mut_list += SM
-		if(prob(20))
+		if(prob(20) && temp_mut_list.len)
 			mutations.Remove(pick(temp_mut_list))
 		temp_mut_list.Cut()
 
@@ -70,21 +70,21 @@
 		for(var/datum/spacevine_mutation/SM in mutations)
 			if(SM.quality == MINOR_NEGATIVE)
 				temp_mut_list += SM
-		if(prob(20))
+		if(prob(20) && temp_mut_list.len)
 			mutations.Remove(pick(temp_mut_list))
 		temp_mut_list.Cut()
 
 	if(S.has_reagent("blood", 15))
-		production = Clamp(production + rand(15, -5),1,10)
+		adjust_production(rand(15, -5))
 
 	if(S.has_reagent("amanitin", 5))
-		production = Clamp(production + rand(5, -15),1,10)
+		adjust_production(rand(5, -15))
 
 	if(S.has_reagent("plasma", 5))
-		potency = Clamp(potency + rand(5, -15),0,100)
+		adjust_potency(rand(5, -15))
 
 	if(S.has_reagent("holywater", 10))
-		potency = Clamp(potency + rand(15, -5),0,100)
+		adjust_potency(rand(15, -5))
 
 
 /obj/item/weapon/reagent_containers/food/snacks/grown/kudzupod
diff --git a/code/modules/hydroponics/seeds.dm b/code/modules/hydroponics/seeds.dm
index 5c976119dbd..5b7cb07f402 100644
--- a/code/modules/hydroponics/seeds.dm
+++ b/code/modules/hydroponics/seeds.dm
@@ -211,7 +211,7 @@
 		C.value = weed_rate
 
 /obj/item/seeds/proc/adjust_weed_chance(adjustamt)
-	weed_chance = Clamp(weed_chance + adjustamt, 0, 67)
+	weed_chance = Clamp(weed_chance + adjustamt, 0, 100)
 	var/datum/plant_gene/core/C = get_gene(/datum/plant_gene/core/weed_chance)
 	if(C)
 		C.value = weed_chance