Purple Tomatillo Seeds

Start seeds indoors about 4–6 weeks before the expected last spring frost. Transplant outdoors after frost danger has passed, the soil has warmed, and nighttime temperatures remain reliably above about 50°F.

Tomatillos thrive in warm weather and commonly begin producing about 75–100 days after transplanting, depending on the variety and growing conditions.

Sow seeds about ¼ inch deep in moist seed-starting mix. Provide warmth and bright light after emergence, then harden seedlings gradually before moving them outdoors.

Space plants about 3 feet apart, since mature plants may reach 3–4 feet tall and equally wide. Plant at least two seedlings near one another for dependable fruit set. Each flower contains both male and female parts, but many tomatillos only partially accept their own pollen and fruit more reliably when pollinated by another genetically distinct plant. Two seedlings from the same open-pollinated seed packet are generally different enough.

Choose a site with full sun and loose, well-drained soil enriched with finished compost. Tomatillos are vigorous plants, so balanced fertility is more useful than heavy feeding, which can produce excessive leafy growth.

Keep moisture steady during flowering and fruit development. Mulch after the soil has warmed to conserve moisture and suppress weeds. Cages or sturdy stakes help support the sprawling branches, while nearby flowers encourage the bees that move pollen between plants.

Harvest when the fruit has filled the husk and the husk begins changing from green to tan or splitting open. The fruit is usually green or just beginning to show its mature color at peak tanginess.

Check plants regularly because ripe fruit may fall to the ground. Remove the husk before use and rinse away the naturally sticky coating. Tomatillos continue producing until frost when fruit is picked regularly.