diff --git a/code/modules/events/spacevine.dm b/code/modules/events/spacevine.dm
index 54360d7a231..473f6430885 100644
--- a/code/modules/events/spacevine.dm
+++ b/code/modules/events/spacevine.dm
@@ -43,6 +43,10 @@
 /// Kudzu spread multiplier is a reciporal function of production speed, such that the better the production speed, ie. the lower the speed value is, the faster it spreads
 #define SPREAD_MULTIPLIER_MAX 50
 
+/// Kudzu's maximum possible maximum mutation severity (assuming ideal potency), used to balance mutation appearance chance
+#define IDEAL_MAX_SEVERITY 20
+
+
 /datum/round_event_control/spacevine
 	name = "Space Vines"
 	typepath = /datum/round_event/spacevine
@@ -525,7 +529,7 @@
 	var/spread_multiplier = 5 // corresponds to artifical kudzu with production speed of 1, approaches 10% of total vines will spread per second
 	///Maximum spreading limit (ie. how many kudzu can there be) for this controller
 	var/spread_cap = 30 // corresponds to artifical kudzu with production speed of 3.5
-	var/list/vine_mutations_list
+	var/static/list/vine_mutations_list
 	var/mutativeness = 1
 	///Maximum sum of mutation severities
 	var/max_mutation_severity = 20
@@ -540,10 +544,11 @@
 	if(event)
 		event.announce_to_ghosts(vine)
 	START_PROCESSING(SSobj, src)
-	vine_mutations_list = list()
-	init_subtypes(/datum/spacevine_mutation/, vine_mutations_list)
-	for(var/datum/spacevine_mutation/mutation as anything in vine_mutations_list)
-		vine_mutations_list[mutation] = max_mutation_severity - mutation.severity // this is intended to be before the potency check as the ideal maximum potency is used for weighting
+	if(!vine_mutations_list)
+		vine_mutations_list = list()
+		init_subtypes(/datum/spacevine_mutation/, vine_mutations_list)
+		for(var/datum/spacevine_mutation/mutation as anything in vine_mutations_list)
+			vine_mutations_list[mutation] = IDEAL_MAX_SEVERITY - mutation.severity // the ideal maximum potency is used for weighting
 	if(potency != null)
 		mutativeness = potency * MUTATIVENESS_SCALE_FACTOR // If potency is 100, 20 mutativeness; if 1: 0.2 mutativeness
 		max_mutation_severity = round(potency * MAX_SEVERITY_LINEAR_COEFF + MAX_SEVERITY_CONSTANT_TERM) // If potency is 100, 25 max mutation severity; if 1, 10 max mutation severity
@@ -760,4 +765,5 @@
 #undef SPREAD_CAP_LINEAR_COEFF
 #undef SPREAD_CAP_CONSTANT_TERM
 #undef SPREAD_MULTIPLIER_MAX
+#undef IDEAL_MAX_SEVERITY
 */
diff --git a/modular_skyrat/master_files/code/modules/events/spacevine.dm b/modular_skyrat/master_files/code/modules/events/spacevine.dm
index 1d72fe39d5e..2697cc281cc 100644
--- a/modular_skyrat/master_files/code/modules/events/spacevine.dm
+++ b/modular_skyrat/master_files/code/modules/events/spacevine.dm
@@ -36,6 +36,10 @@
 /// Kudzu spread multiplier is a reciporal function of production speed, such that the better the production speed, ie. the lower the speed value is, the faster it spreads
 #define SPREAD_MULTIPLIER_MAX 50
 
+/// Kudzu's maximum possible maximum mutation severity (assuming ideal potency), used to balance mutation appearance chance
+#define IDEAL_MAX_SEVERITY 20
+
+
 /datum/round_event_control/spacevine
 	name = "Space Vines"
 	typepath = /datum/round_event/spacevine
@@ -767,7 +771,7 @@
 	/// The actual cap to how quickly it spreads.
 	var/spread_cap = 30
 	/// A referenced list to all of the current mutations the vine has!
-	var/list/vine_mutations_list
+	var/list/static/vine_mutations_list
 	/// How likely it is to mutate!
 	var/mutativeness = 1
 
@@ -779,8 +783,9 @@
 	if (event)
 		event.announce_to_ghosts(spawned_vine)
 	START_PROCESSING(SSobj, src)
-	vine_mutations_list = list()
-	init_subtypes(/datum/spacevine_mutation/, vine_mutations_list)
+	if(!vine_mutations_list)
+		vine_mutations_list = list()
+		init_subtypes(/datum/spacevine_mutation/, vine_mutations_list)
 	if(potency != null)
 		mutativeness = potency / 10
 	if(production != null && production <= 10) // Prevents runtime in case production is set to 11.
@@ -986,3 +991,4 @@
 #undef SEVERITY_AVERAGE
 #undef SEVERITY_ABOVE_AVERAGE
 #undef SEVERITY_MAJOR
+#undef IDEAL_MAX_SEVERITY