How to grow ground cherry
Physalis pruinosa · Solanaceae · Fruit
When to plant ground cherries: the short answer
Start seeds indoors about 7 weeks before your last spring frost; plant out about 1 week after it. Wait until the soil is at least 70°F; ground cherries sprout fastest near 82°F.
Zone 5: plant out Apr 30 – May 17. Zone 7: plant out Apr 5 – Apr 22. Zone 9: plant out Feb 20 – Mar 9. See every zone.
Ground Cherry is a warm-season fruiting crop in the Solanaceae family, usually started indoors and set out as transplants. It wants full sun (six or more hours of direct light) and steady, even moisture. From sowing to first pick is about 70–90 days. It is killed by frost, so nothing goes outside until the danger has passed and the soil has warmed.
Grower’s note: A low, sprawling cousin of the tomatillo with small, sweet, pineapple-flavoured fruit inside a husk. Ripe fruit drops to the ground - hence the name - and keeps for weeks in its husk. Self-seeds freely once grown.
Sowing
Sow about 0.25″ deep, into soil between 70–90°F — germination is quickest near 82°F. It is slow and often erratic to germinate (7–21 days). For an early crop, start seed indoors about 7 weeks before your last spring frost and grow it under bright light.
Spacing & layout
Give each plant about 30″ along the row with roughly 36″ between rows. On a square-foot grid that is one plant per 2 square feet. Allow at least 14″ of loose, workable soil for the roots. It grows well in containers at least 14″ deep.
Fitting it to your season
Ground Cherry needs roughly 70–90 frost-free days to crop. Where the season is shorter than that, start it indoors and choose the earliest-maturing varieties, or grow it in a container you can move under cover on cold nights. In long, hot-summer regions it can often be planted twice — once in spring and again in mid-to-late summer for a fall harvest.
Quick facts
Growth stages: how long ground cherries take to grow
From seed to first harvest takes roughly 18-21 weeks: about 8 weeks as a seedling indoors, then 70-90 days in the garden.
When to plant ground cherry
When to plant ground cherries by USDA zone
Dates worked out from each zone’s typical frost dates for 2026. Find your zone on the zone map, or pick your state below for dates from its own frost dates. Zones 11 and above are frost-free, so timing there depends on heat and rain instead.
| Zone | Last / first frost | Start indoors | Sow or plant out |
|---|---|---|---|
| Zone 3 | May 15 / Sep 15 | Mar 20 – Apr 3 | May 15 – Jun 1 |
| Zone 4 | May 10 / Sep 25 | Mar 15 – Mar 29 | May 10 – May 27 |
| Zone 5 | Apr 30 / Oct 5 | Mar 5 – Mar 19 | Apr 30 – May 17 |
| Zone 6 | Apr 15 / Oct 15 | Feb 18 – Mar 4 | Apr 15 – May 2 |
| Zone 7 | Apr 5 / Oct 25 | Feb 8 – Feb 22 | Apr 5 – Apr 22 |
| Zone 8 | Mar 20 / Nov 5 | Jan 23 – Feb 6 | Mar 20 – Apr 6 |
| Zone 9 | Feb 20 / Nov 30 | Dec 26 – Jan 9 | Feb 20 – Mar 9 |
| Zone 10 | Jan 30 / Dec 15 | Dec 5 – Dec 19 | Jan 30 – Feb 16 |
Companions
Bell Pepper, Basil
No strong antagonists recorded.
Common problems
Pests: flea beetle, cutworm.
Diseases & disorders: early blight, mosaic virus.
Same family (Solanaceae)
Rotate these so they don’t follow each other in the same bed year to year.
Questions gardeners ask
When should I plant ground cherries?
Start seeds indoors about 7 weeks before your last spring frost; plant out about 1 week after it. Wait until the soil is at least 70°F. The table on this page gives dates for each USDA zone, and the planting calendar gives dates for your own state or ZIP code.
How long do ground cherries take to grow?
About 70-90 days from transplanting to the first harvest, or roughly 18-21 weeks from sowing the seed indoors. Seeds germinate in 7-21 days.
How much sun do ground cherries need?
They need at least six to eight hours of direct sun a day.
What soil pH do ground cherries need?
A soil pH between 6.0 and 7.0. Test before adding lime or sulfur - see the soil pH and testing guide.
How far apart should I plant ground cherries?
Space plants about 30 inches apart in rows 36 inches apart, or one plant per 2 square feet in a square-foot bed. Sow seeds about ¼ inch deep.
Can I grow ground cherries in a container?
Yes. Use a container at least 14 inches deep with drainage holes and a good potting mix, and water more often than you would in the ground.
Figures are typical home-garden ranges from Cooperative Extension planting guides, cross-checked against multiple state sources. Your variety and conditions will vary.