Four plants for two people should be plenty for snacking. By mid summer, mine were producing roughly a dozen per plant per day. What's nice is that - unless you have serious bug problems - the ground cherries can sit on the ground for several days and still be very tasty. So you could collect a few dozen over a 2 week period and have enough for a pint or two of preserves. I'm hoping to get enough to try that this year as well!
I treated everything a couple of days ago with Gnatrol WDG, an OMRI listed product. The only way I'll be able to tell if it had an effect is to see root-damaged plants start to recover and adult populations diminishing. It requires several treatments, so I'm going to have to learn some discipline!
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