Plant family

Ground cherries are in the nightshade family (Solanaceae), along with their close relatives tomatoes, potatoes, peppers, eggplant, and tomatillos. Because these crops share many of the same pests and diseases, gardeners should treat them as one group when planning rotations.

Why rotate ground cherries

When ground cherries or their nightshade relatives grow in the same bed year after year, soilborne diseases such as early blight, verticillium wilt, and fusarium wilt can build up and persist in the soil. Pests like flea beetles, Colorado potato beetles, and root knot nematodes also accumulate when their favorite host family stays put. On top of that, these are moderate to heavy feeders, so repeated planting in one spot can draw down nutrients and leave the soil unbalanced.

What to plant after

Ground cherries do well following legumes such as beans, peas, or clover, because these crops fix nitrogen in the soil and leave it richer for the feeders that come next. Leafy greens or a cover crop also make good predecessors, since they do not share nightshade diseases and help keep the bed in good condition. Following a legume year is an especially reliable way to give ground cherries a strong start.

What to avoid

Avoid planting ground cherries right before or after any other nightshade, including tomatoes, potatoes, peppers, eggplant, and tomatillos, because they share the same diseases and pests that linger in the soil. Following one nightshade with another gives problems like blight, wilt, and flea beetles an easy path to carry over from one season to the next. Keep at least a full season, and ideally more, between nightshade crops in the same bed.

Example rotation

A simple four-year plan for one bed might go: Year 1 legumes (bush beans or peas), Year 2 ground cherries, Year 3 leafy greens or a squash family crop, and Year 4 root crops like carrots or onions. After the fourth year you return to legumes and start the cycle again, which keeps ground cherries out of that bed for three years at a time. If you have several beds, simply shift each crop group to the next bed each season.

Tips

Keep a simple garden map or notebook noting where each crop family grows so you can avoid repeating nightshades too soon, and aim to wait about three years before ground cherries return to the same spot. Grouping all your nightshades together in one bed makes them easy to move as a unit, and sowing a cover crop such as clover in the off year helps rebuild the soil before the next planting.

General guidance for US home gardens. Adapt to your own crops, soil, and space; your Cooperative Extension office can help with a plan for your area. Page updated Aug 4, 2026.