How to Grow Tomatillos USA | Complete Growing Guide

At a Glance

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

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.