Fertilising guide
How to fertilise Cutleaf Ground Cherry (Physalis angulata)— schedule & NPK
Also called Cutleaf Ground Cherry, Angular Winter Cherry, Streamside Ground Cherry, Wild Tomatillo.
More about cutleaf ground cherry
About Cutleaf Ground Cherry
Physalis angulata · also called Cutleaf Ground Cherry, Angular Winter Cherry · edible
Cutleaf Ground Cherry is a warm-season annual native to tropical and subtropical Americas, producing small, straw-yellow berries inside papery husks with a mild, sweet-tart flavour. It self-seeds prolifically and is considered a weed in many regions. Ripe berries are edible; green parts and unripe fruits contain solanine compounds and should not be consumed.
Growth habit: Erect to spreading warm-season annual; self-seeds prolifically
What fertiliser cutleaf ground cherry actually wants — and why
Cutleaf Ground Cherry feeds in two distinct phases — balanced to build the plant, then high-potassium the moment flowering starts to set and fill a heavy crop.
Balanced (even N-P-K) at planting for roots and frame, then switch to a high-potassium ("high-potash") tomato-style feed once the first flowers open — potassium is what sizes and ripens fruit, not nitrogen.
For the language behind the three numbers on the bottle — what nitrogen, phosphorus and potassium each do — see the NPK ratio explained entry. The short version for cutleaf ground cherry: match the feed to the job the plant is doing right now, not to a generic “plant food” on the shelf.
How often to feed cutleaf ground cherry, and which months
Feeding only earns its keep while the plant is in active growth and can use the nutrients — pour feed into a dormant or low-light plant and it simply builds up as root-burning salt. For cutleaf ground cherry:
Light feeding with a balanced fertiliser at transplanting or seedling establishment. Avoid nitrogen-heavy feeds on mature plants — moderate fertility produces better fruiting. A potassium-rich feed during fruit development improves yield and flavour. So: a balanced feed or compost at planting, then a high-potash liquid every 1-2 weeks from first flower through harvest across the main season (spring through early autumn).
The dormant-season rule matters more than the exact interval: skip feeding entirely when cutleaf ground cherry is resting. For the wider context on indoor feeding rhythms across the seasons, the houseplant fertiliser schedule walks through the year month by month.
What strength to mix for cutleaf ground cherry
Follow the crop-feed label rate for cutleaf ground cherry — these are calibrated for hungry vegetables. Consistency through fruiting matters more than strength; erratic feeding causes problems like blossom-end rot.
Feeding always goes onto already-damp soil, never dry roots — water cutleaf ground cherry first if the soil is dry, then apply the diluted feed. The companion question is when to water at all, covered in the cutleaf ground cherry watering schedule.
Signs you are over-feeding cutleaf ground cherry
Over-feeding is far more common — and more damaging — than under-feeding for most plants. The classic tells for cutleaf ground cherry:
- Vigorous dark-green leafy growth but few flowers or fruit (excess nitrogen).
- Lush foliage hiding the crop; soft growth prone to pests and disease.
- Salt crust on the soil and scorched leaf edges in containers.
Signs you are under-feeding cutleaf ground cherry
- Pale, yellowing lower leaves and stunted growth.
- Small fruit, poor set, and a quickly exhausted plant.
- Blossom-end rot and weak cropping from erratic or insufficient feeding.
If the symptoms point at watering, light or roots rather than nutrition, the full cutleaf ground cherry care brief covers soil, humidity and the common problems for this species.
Flushing and leaching the salts
In containers, fertiliser salts build up fast — water cutleaf ground cherry thoroughly so excess drains from the base each time, and flush pots with plain water every few weeks to prevent a damaging salt build-up.
Organic vs synthetic feeds for cutleaf ground cherry
Organic options
Garden compost or well-rotted manure dug in before planting, plus a liquid comfrey or seaweed feed once fruiting starts. UK: comfrey feed or organic Tomorite; US: Espoma Tomato-tone or Neptune's Harvest. Builds soil and feeds in one.
Synthetic / liquid feeds
A balanced feed at planting then a high-potash tomato feed in fruiting — UK: Growmore at planting then Tomorite (Levington) or Phostrogen; US: a balanced 10-10-10 then Miracle-Gro Tomato or a bloom booster.
Brand names are examples, not endorsements, and UK and US ranges differ — check the label’s own NPK and dilution rate, since formulations change.
Fertilising cutleaf ground cherry — frequently asked questions
What fertiliser does cutleaf ground cherry need?
Balanced (even N-P-K) at planting for roots and frame, then switch to a high-potassium ("high-potash") tomato-style feed once the first flowers open — potassium is what sizes and ripens fruit, not nitrogen. Cutleaf Ground Cherry feeds in two distinct phases — balanced to build the plant, then high-potassium the moment flowering starts to set and fill a heavy crop.
How often should I feed cutleaf ground cherry?
Light feeding with a balanced fertiliser at transplanting or seedling establishment. Avoid nitrogen-heavy feeds on mature plants — moderate fertility produces better fruiting. A potassium-rich feed during fruit development improves yield and flavour. Light feeding with a balanced fertiliser at transplanting or seedling establishment. Avoid nitrogen-heavy feeds on mature plants — moderate fertility produces better fruiting. A potassium-rich feed during fruit development improves yield and flavour. So: a balanced feed or compost at planting, then a high-potash liquid every 1-2 weeks from first flower through harvest across the main season (spring through early autumn).
What strength of feed for cutleaf ground cherry?
Follow the crop-feed label rate for cutleaf ground cherry — these are calibrated for hungry vegetables. Consistency through fruiting matters more than strength; erratic feeding causes problems like blossom-end rot.
What does over-feeding cutleaf ground cherry look like?
Vigorous dark-green leafy growth but few flowers or fruit (excess nitrogen). Lush foliage hiding the crop; soft growth prone to pests and disease. Salt crust on the soil and scorched leaf edges in containers. Staying on a high-nitrogen feed once cutleaf ground cherry starts flowering is the classic error — you get a huge leafy plant and a disappointing crop. Switch to high-potash the moment flowers appear.
Should I flush the soil of cutleaf ground cherry?
In containers, fertiliser salts build up fast — water cutleaf ground cherry thoroughly so excess drains from the base each time, and flush pots with plain water every few weeks to prevent a damaging salt build-up.
Keep reading
- Cutleaf Ground Cherry care — the full brief (light, soil, humidity, problems, pet safety)
- How often to water cutleaf ground cherry — the watering schedule
- The houseplant fertiliser schedule — feeding through the year
- NPK ratio explained — what the three numbers on the bottle mean
- How to fertilise husk tomato
- How to fertilise longleaf ground cherry
- How to fertilise mara des bois strawberry
- All 8452 fertilising guides in the Growli library