Ground cherry
Physalis pruinosa
Also known asHusk cherry · Cape gooseberry (P. peruviana, related) · Strawberry tomato · Aunt Molly's tomato · Pichuberry
Environment
The bounded range this crop tolerates.
Climate and zones
- USDA zones
- 4–12 (winter low around -34°C)
- Frost
- frost sensitive (dies at first frost)
- Season
- warm (summer, frost-sensitive)
Growing systems
Root mass: moderate.
Growing media
| Medium | pH effect | 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 | high | high |
Nutrient demand by stage
NPK ratios are relative weights. EC targets shift through the plant's life.
| Stage | N | P | K | EC (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.
Aquaponics suitability
Compatible
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
| 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. |