Get a crop/plant to only spawn in certain biome types

Hello,

in my mod I wanted to modify vanilla crops (e.g. wheat seeds) to only grow in certain biome types (in the case of wheat, I want it to only grow in biomes that don't have the 'is_cold/overworld' biome tag). I tried to set up a procedure which sets the 'age' value to 0 if the crop is in such a biome, but for some reason it's not working and I can't figure out why. Could someone show me how I could create such a procedure? I'm fairly new to MCreator and would appreciate every help :)