Fixes growing rice stalk being invisible at later stages.

Fixes empty trays not receiving the nutrient/reagents/water you give it.

code/modules/hydroponics/hydroponics.dm

@@ -405,7 +405,8 @@ obj/machinery/hydroponics/proc/mutatepest()
 
 obj/machinery/hydroponics/proc/applyChemicals(var/datum/reagents/S)
 
-	myseed.on_chem_reaction(S) //In case seeds have some special interactions with special chems, currently only used by vines
+	if(myseed)
+		myseed.on_chem_reaction(S) //In case seeds have some special interactions with special chems, currently only used by vines
 
 	// Requires 5 mutagen to possibly change species.// Poor man's mutagen.
 	if(S.has_reagent("mutagen", 5) || S.has_reagent("radium", 10) || S.has_reagent("uranium", 10))

code/modules/hydroponics/seeds.dm

@@ -577,7 +577,7 @@
 	potency = 15
 	oneharvest = 1
 	plant_type = 0
-	growthstages = 6
+	growthstages = 3
 
 /obj/item/seeds/carrotseed
 	name = "pack of carrot seeds"