I picked the ones I'd read got biggest. They are pretty awesome. These three are in my kiddie pool with what is left of my squash and corn plants. I'm going to have a hard time with all kinds of roots when I'm ready to clear. I'll try to harvest some seeds. Maybe for eating or planting next year. The powder worked pretty well. There aren't as many caterpillars. There were hundreds and now I'm only seeing a few.