How to Grow Tomatillos UK | Regional Planting Calendar

Regional Planting Calendar

Region	Sow
Southern England	mid May to mid June
Midlands	mid May to mid June
Northern England	mid May to mid June
Scotland	mid May to mid June

Southern England - detail & sources

NC State Extension: plant transplants out after frost threat has passed in late spring; a single window is applied uniformly across all four sub-regions since the source gives no UK-region-specific gradient.

Midlands - detail & sources

NC State Extension: plant transplants out after frost threat has passed in late spring; a single window is applied uniformly across all four sub-regions since the source gives no UK-region-specific gradient.

Northern England - detail & sources

NC State Extension: plant transplants out after frost threat has passed in late spring; a single window is applied uniformly across all four sub-regions since the source gives no UK-region-specific gradient.

Scotland - detail & sources

NC State Extension: plant transplants out after frost threat has passed in late spring; a single window is applied uniformly across all four sub-regions since the source gives no UK-region-specific gradient.

Quick Facts

Factor	Value
Soil pH	6 - 7
Sunlight	6-6 hours direct sun
Germination temp	27C
Time to harvest	60-75 days
Drainage	Well-drained
Lifecycle	annual
Edible parts	fruit

At a Glance

Soil & Growing Conditions

Soil pH range

6 7

Span reflects genuine variation between the cited authorities, not a single agreed figure.

Growth Stages

Stage	BBCH	Notes
Transplanting	0	Plant transplants out after frost threat has passed in late spring (NC State Extension).
Sprawling growth	3	Rapid, indeterminate, sprawling growth to 3-4 feet; stems root where touching ground, benefiting from support (NC State Extension).
Flowering and fruit set	6	Small bell-shaped flowers appear; plant multiple tomatillos for better fruit set due to poor self-pollination (NC State Extension).
Fruit ripening and harvest	8	Ready for harvest about 60-75 days from transplanting, continuing until first frost (NC State Extension).

Harvest & Storage

When to pick: USU: "Expect to begin harvesting fruit about 60-75 days from transplanting"; "Tomatillos are ripe when the fruit is firm and fills the papery husk"; purple varieties ready "when the green fruits turn purple and fill the husk". RHS: fruit "ripen from green to yellow or purple", enclosed in "thin, paper-like husk".

Storage

Best used fresh; husk helps protect fruit for short-term storage

Diseases

Powdery mildew

Pests

Aphids

Aphididae (various spp.)

Flea beetles

Chrysomelidae: Alticini (various spp.)

Tomatillo, the Papery-Husked Salsa Fruit

Poor self-pollination

NC State Extension: tomatillos self-pollinate poorly, so plant multiple tomatillos together for better fruit set.

Fruit enclosed in a papery husk

RHS: fleshy, edible berries enclosed in an enlarged, often colourful calyx husk.

A distinctive ridged, lantern-like husk

The papery husk enlarges as the fruit inside develops, showing characteristic ridged veining.

Ripe when firm and filling the husk

NC State Extension: fruit is ripe when firm but filling the husk; green varieties turn yellow-green as they ripen.

The husk splits as the fruit matures

As the fruit inside grows, the papery husk dries, splits and eventually reveals the ripe tomatillo.

References

1. GBIF - GBIF Backbone Taxonomy: Physalis philadelphica

   country=INTL

2. NC State Extension Gardener Plant Toolbox - Tomatillo (Physalis philadelphica)

   Full sun (6+ hours direct sunlight). Moist, rich, well-drained soil with high organic matter, loam or sand preferred, avoiding heavy wet clay. Height and spread 3-4 feet; rapid growth rate; indeterminate, sprawling habit, stems rooting when touching ground, benefiting from support such as a tomato cage or trellis. Annual, propagated from transplants (not sown direct), planted after frost threat in late spring. Ready for harvest about 60-75 days from transplanting; each plant yields about 2-3 pounds of fruit over summer and fall, until first frost. Mature fruits are edible whole; green varieties turn yellow-green, purple varieties turn purple, ripe when firm but filling the husk. Few insect or disease problems; poor self-pollination, so plant multiple tomatillos for better fruit set. Relatively drought tolerant, low to medium maintenance. All plant parts toxic except ripe fruit.

3. RHS - Physalis ixocarpa | tomatillo

   country=UK

4. RHS - Physalis philadelphica | miltomate

   country=UK

5. Royal Horticultural Society - Powdery mildews

   country=UK

6. Royal Horticultural Society (RHS Advice Team) - Aphids: Identification and Control

   Directly fetched and verified. RHS explicitly does not recommend pesticide use against aphids; recommends tolerance, manual squashing, and encouraging/purchasing natural predators (ladybirds, hoverflies, lacewings, parasitoid wasps, earwigs) as biological control, especially under glass.

7. Utah State University Extension - Tomatillos in the Garden

   country=USA

7 independent sources are cited for this crop. Where they disagree - soil pH is the clearest case - every figure is preserved rather than averaged into false precision.