A hardy relative of tomatillo, per the crop database's own description, with a genuine practical difference: ground cherry is self-fertile, so one plant is all you need, unlike its self-incompatible cousin. It self-seeds so readily that volunteer plants from last year's dropped fruit are a normal, expected sight -- and sweet, caramel-flavoured ripe fruit falls from the plant on its own, making harvest almost effortless.
Water need
Genuinely more drought-tolerant than tomatillo or tomato once established -- part of what the crop database means by "hardy relative."
Calories at a glance
530 kcal/kg -- noticeably ahead of tomatillo, grown mainly for its distinctive sweet flavour rather than as a calorie staple (scale is log-based across all 55 core crops in the calculator).
Temperature Range by Month
Month on the bottom, temperature up the side. The pale green background is what the plant can survive at all -- fatal above or below it, labelled directly on the chart where that applies to your zone. The coral band is its ideal range, and only fades in during the months this zone would actually have the crop in the ground -- reusing the exact same sowing/harvesting data as the calendar further down the page. The blue line is real monthly climate data (not a modelled estimate) for a representative rural/agricultural location in this zone -- a small farming town or agricultural research station rather than a major city, to avoid the warmer bias city weather stations have. For the actual verdict on how well this crop does in your zone, see the badge at the top of the page -- that's based on the site's own researched yield figures, not this chart.
Quick Start: Sowing to Storage
- Start indoors like tomatoes. Sow indoors 6-8 weeks before the last frost, then harden off and transplant once frost risk has passed -- treat it the same as starting a tomato.
- Give plants room to sprawl. Ground cherry forms a low, bushy, sprawling plant -- space it generously and stake lightly if needed to keep fruit off wet ground.
- Wait for fruit to drop. Ripe ground cherries fall from the plant on their own inside their husk -- this is the easiest, most reliable ripeness signal there is.
- Gather fallen fruit regularly. Collect dropped fruit every few days from underneath the plant, still in its husk, rather than picking from the plant itself.
- Store in the husk, don't wash until use. Leave the husk on and store somewhere cool and dry -- it protects the fruit and meaningfully extends how long it keeps before use.
Sowing & Harvesting Calendar
Pick your zone under "Temperature Range by Month" above and this updates too. Boreal and Alpine show no window at all -- this site's own yield data marks ground cherry as not viable in either.
Calories & Yield
Tropical, Subtropical and Mediterranean zones tie for the best yield here.
| Climate Zone | Yield per plant | Calories per plant | Viability |
|---|---|---|---|
| Tropical / Humid | 1.5 kg | 795 kcal | Viable -- best yield |
| Subtropical | 1.5 kg | 795 kcal | Viable -- best yield |
| Mediterranean | 1.5 kg | 795 kcal | Viable -- best yield |
| Temperate Maritime | 0.6 kg | 318 kcal | Challenging (60% yield) |
| Temperate Continental | 0.72 kg | 381.6 kcal | Challenging (60% yield) |
| Cool / Boreal | -- | -- | Not viable |
| Arid / Semi-Arid | 0.6 kg | 318 kcal | Challenging (60% yield) |
| Highland / Alpine | -- | -- | Not viable |
Figures per plant sown, from the site's own crop database. Maritime, Continental and Arid already reflect the 60% penalty applied to challenging zones.
Varieties Worth Knowing
Ground cherry has fewer named varieties than most fruiting crops, but two long-established heirlooms cover most of the real diversity. Both below are open-pollinated (OP), meaning seed saved from them breeds true and is worth keeping under this site's seed-saving approach; neither is an F1 hybrid.
Seed Saving -- Quick Guide
Ground cherry generally doesn't cross with tomatillo despite sharing a genus (Physalis) -- the real crossing risk is other ground cherry varieties, and wild/weedy ground cherry relatives if present nearby.
SERVINGS, NOT DAILY CALORIES This works out plate-sized servings of ground cherry from your seed during its fresh harvest window only, not your group's full daily calorie needs. For that, use the main calculator.
Estimated for your selected zone above, using this site's own germination, loss and yield figures for ground cherry -- a helping is roughly what you'd put on a plate as part of a meal with other veg. Treat it as a planning estimate, not a promise.
Storage & Preservation
Left in their papery husks, fresh ground cherries keep for several weeks in a cool, dry spot -- the husk does genuine protective work, so don't remove it until you're ready to use the fruit.
For longer-term storage, ground cherries freeze well, dry into a raisin-like snack, and make excellent jam -- their natural sweetness needs less added sugar than most preserving fruit.
Growing Ground Cherry Without Bought Inputs
Genuinely one of the most trouble-free fruiting vegetables on this site -- its hardiness and self-seeding habit mean it often thrives with minimal attention once established.
Volunteer seedlings from self-seeding can become a minor weeding task rather than a pest problem as such.
Hoeing out unwanted volunteers early, or transplanting the useful ones where you want them, turns this quirk into free plants rather than a nuisance.
Frequently Asked Questions
Do I need more than one ground cherry plant to get fruit?
No -- unlike its close relative tomatillo, ground cherry is self-fertile, so a single plant sets fruit perfectly well on its own. That's the main practical difference between the two Physalis crops on this site.
Why does ground cherry self-seed so readily?
The crop database says it plainly: it self-seeds readily. Ripe fruit that drops to the ground inside its husk germinates easily the following season, so volunteer plants popping up where you didn't plant them is a normal, expected quirk rather than a problem -- worth knowing before you're surprised by it.
Does ground cherry cross-pollinate with tomatillo?
It's a low but genuine risk. Ground cherry and tomatillo are the same genus, Physalis, but different species -- the same relationship as tomato and potato elsewhere on this site, where different species normally don't cross under ordinary garden conditions. Isolate or hand-pollinate if you want certainty while saving seed from both.