Serris, I'm a berry fiend. You can get five at a time maximum of the stat altering berries and up to 15 at a time of the ones you trade in for acessories. The more you water the plants, the more berries you get. Growth mulch cuts the time it takes for the plants to grow, but dries the soil out faster. Damp mulch is vice-versa. Gooey mulch increases the chances that plants will re-grow if you don't pick the berries and the other one (blanking on the name) increases the time berries stay on their plants before dropping. I'm happy to grow and harvest berries for those who need them, however, I still don't have every one. I need Micle, Bluk, Leichi, and a few others. Whatever. XD Basically you can contact me if you need or want berries grown.