No plant sims in my world

I had the same problem. My sim was living in an apartment in the city and I didn't see any plantsims around. Then my sim went to a Garden Gnomes club gathering in Windenburg at Hare Square and a lot of plant sims just started showing up and wandering around. Most of the plantsims were actually former human sims that had randomly changed into plantsims. I only saw the plantsims during the day, mostly late morning or early afternoon i think. The plantsims later change back to human sims though so my sim couldn't just call and invite them over later to collect beans that way. I just got my sim to travel to Hare Square and start a club gathering with her Garden Gnomes club a few times until I could collect all the beans. It only took 2 sim days. I found it easier to get some of the plantsims in the right mood by inviting them into the Garden Gnomes club my sim was in and buying club perks to change the group vibe to whatever I needed, like sad or confident. Also the plantsims that became club members had to show up to the next club gathering the next day and when they changed back into the plantsim form again my sim got another chance to get a different bean from them so I didn't have to hunt down as many plantsims to complete the collection. To get the uncomfortable bean my vampire sim used the deprive neeeds interaction to deprive a plantsims hygiene motive. Be warned though, after my vampire sim completed the bean collection and went through the plantsim portal and ate the forbidden fruit that she collected it had no effect on her so I don't think vampire sims can change into plantsims. My vampire sim can still go through the portal and collect things though.