Ground cherry
Physalis pruinosa
Also known as: Husk cherry, Cape gooseberry (P. peruviana, related), Strawberry tomato, Aunt Molly's tomato, Pichuberry
Quick facts
- Category
- fruiting
- Difficulty
- beginner
- Days to harvest
- 70 to 90 days
- Harvest type
- continuous production over weeks or months
- Spacing
- 60 cm between plants
Environment
- Temperature
- 18–28°C
- pH
- 6 to 7
- EC (hydroponic)
- 1.8 to 2.6 mS/cm
- Daily light
- 20 to 28 mol/m²/day
Climate and zones
- USDA zones
- 4 to 12 (winter low around -34°C or warmer)
- Frost tolerance
- frost sensitive (dies at first frost)
- Season
- warm (summer crops, frost-sensitive)
Viable growing environments:
- outdoor in growing season (annual)
- unheated greenhouse / hoop house
- heated greenhouse
- indoor hydroponics under grow lights
USDA zone bounds reflect outdoor year-round survival. Anywhere outside the bounded zone range, this crop still grows as an annual in the warm months (outdoor_seasonal), under cover (greenhouse), or indoors under lights.
Growing systems
Ground cherry works in:
- drip / Dutch buckets
- media bed (ebb and flow)
- soil bed
Growing media
The substrate the roots sit in. Choice depends on the system (clay pebbles don't fit NFT channels; rockwool isn't used in media beds) and the crop (ground cherry works in the media listed below).
| Medium | pH effect | Water retention | Bacterial surface |
|---|---|---|---|
| Coco coir (Coconut coir) | slightly acidic | high | moderate |
| Perlite (Expanded volcanic glass) | neutral / inert | very low | low |
| Rockwool (Mineral wool) | alkaline until pre-soaked | very high | low |
| Soil-based mix (Potting soil) | varies by source | high | high |
Bacterial surface area matters for aquaponics: clay pebbles, lava rock, and pumice double as biofilter substrate. Low-surface media (rockwool, perlite, pea gravel) work in hydroponics but need a separate biofilter in aquaponics.
Nutrient demand by stage
NPK ratios are relative weights at each growth stage; the nutrient mix calculator scales them to absolute grams or ml. EC targets shift through the plant's life: seedlings need a much lighter solution than fruiting adults.
| Stage | N | P | K | EC target (mS/cm) |
|---|---|---|---|---|
| seedling | 2 | 1 | 1 | 1.2 |
| vegetative | 3 | 1 | 2 | 1.8 |
| flowering | 1 | 2 | 3 | 2.2 |
| fruiting | 1 | 2 | 3 | 2.4 |
Companion-growing notes
- Heavy uptake of potassium. Co-grown crops with the same demand will end up deficient even at "correct" EC. Plan around this in shared reservoirs.
Aquaponics suitability
Compatible with typical aquaponics nutrient profiles. Fish waste provides enough nitrogen for healthy growth; supplemental potassium, calcium, and iron may still be needed depending on fish stocking density.
Care notes
A productive and easy hydroponic crop related to tomatoes but lower-maintenance. DWC, Dutch bucket, or media bed systems. EC 1.5-2.5 mS/cm. pH 5.5-6.5. Temperature: 18–28°C. Moderate to high light (DLI 16-22 mol/m2/day). The plants are sprawling (40–60 cm tall, spreading wider) and benefit from caging or a low trellis. From transplant to first harvest: 65-80 days. The plants self-pollinate and begin dropping ripe fruit continuously once production starts. Collect fruits from the ground or growing medium surface when the husk is papery and the berry inside is golden. The husk allows storage at room temperature for 2-4 weeks, which is exceptional for a fresh fruit. Each plant produces hundreds of small fruits over a season. The sweet flavor makes ground cherries versatile: eat fresh, add to salads, bake into pies and crisps, make jam, or dehydrate for a raisin-like snack. Pest and disease pressure is lower than for tomatoes. For farmers' market growers, ground cherries command premium prices ($8-15/pint) due to novelty and the hand-harvesting labor.
Notable varieties
A starting shortlist of cultivars worth knowing about. Not exhaustive: the seed catalogs list hundreds of named varieties. These are the ones home growers commonly choose between.
| Cultivar | Type | Days | Notes |
|---|---|---|---|
| Aunt Molly's | heirloom | 80 | Polish heirloom, the most common ground cherry variety in US seed catalogs. Reliable, productive, classic pineapple-vanilla flavor. |
| Goldie | open-pollinated | 75 | Slightly earlier than Aunt Molly's, larger fruit (1.5 cm). Better yield in shorter seasons. |
| Pineapple | heirloom | 75 | Especially strong pineapple flavor note. Smaller plants, slightly less productive. The pick for fresh-eating over preserving. |
Plan a setup with Ground cherry
Verified against: cornell-cea, rhs-uk, u-of-minnesota-extension. Last reviewed 2026-05-15.