While they’re related to tomatoes, tomatillo plants don’t produce juicy fruit. Instead, tomatillos are small, round and firm with a dense interior, making them look (and feel) like unripe tomatoes. They’re often bright green, although some varieties of ripe tomatillos turn yellow or purple.
Tomatillos are hugely prolific and produce nonstop until laid low by frost. Start by applying 2 to 3 inches of organic mulch, such as grass clippings, to suppress weeds and keep the soil moist. Although moderately drought-tolerant, tomatillos do best with an inch or so of water per week.