"Oddities - Tomatillo, Physalis, Cucamelon & Achocha

I adore tomatillos and we eat them in huge quantities - salsas, curries, pickled, great in chutneys, and any recipe that calls for unripe tomatoes ...
I no longer have any seed but because they are so prolific and you need 2 plants for fertilisation I know that seedlings will start popping up both where they grew last year and some fruit fell, and in the compost heap!