Seasons gardening/harvestables *new info* - thank you kalaksed :)

How do bees figure into all of this? Do we have to use them? I have a pomegranate that won't get beyond the tiny plant stage and a strawberry plant that is actually going backwards in quality. My Sim has level 10 gardening, the plants are in a greenhouse (and I increased the wall size to 'tall' just to make sure they weren't too short for the pomegranate). I started a completely new game when I installed Seasons. No mods, no cc.