How to Grow Rocoto Peppers UK | Regional Planting Calendar

Regional Planting Calendar

Quick Facts

Factor	Value
Soil pH	4.3 - 8.3
Sunlight	6-8 hours direct sun
Germination temp	20C
Soil texture	Light (sandy), medium (loamy) or heavy (clay) (PFAF)
Drainage	Prefers well-drained soil, but needs consistently moist conditions through the growing season (PFAF)
Lifecycle	Woody perennial (PFAF)
Edible parts	fruit

Soil & Growing Conditions

Water: Prefers consistently moist soil (PFAF)

Soil pH range

4.3 8.3

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

Growth Stages

Stage	BBCH	Notes
Sowing and germination	0	Sow seed in a warm greenhouse from late winter to early spring; germinates in 3-4 weeks at around 20C (PFAF). Prick seedlings out into individual pots of rich soil.
Vegetative growth	3	Transplant outdoors only after all risk of frost has passed. Keep the soil consistently moist in full sun -- it cannot grow in shade (PFAF).
Flowering	6	Purple, hermaphroditic flowers appear from August to September (PFAF), distinguishing it from the white flowers of most other cultivated Capsicum species (peer-reviewed study).
Harvest	8	Fruit ripens from yellow through orange to red; Andean field trials recorded an average maturation cycle of around 248 days (peer-reviewed study).

Harvest & Storage

When to pick: Thick-walled, pungent fruit ripens from yellow through orange to red and is ready to pick once fully coloured (PFAF; peer-reviewed Andean germplasm study). Andean field trials recorded an average maturation cycle of around 248 days from planting (peer-reviewed study).

Rocoto Pepper Photo Gallery

Rocoto flower

The distinctive purple flower of the rocoto pepper -- unlike the white flowers of most other cultivated chilli species.

Rocoto flower and bud

A rocoto flower and unopened bud, showing the purple colouring typical of this species.

Rocoto's hairy stem

Close detail of the rocoto's pubescent (hairy) stem, the feature the species is named for.

Rocoto plant with ripening fruit

A rocoto pepper plant with fruit ripening to red.

Rocoto plants growing

A row of rocoto pepper plants in cultivation.

Ripe rocoto (manzano) fruit

Ripe, apple-shaped rocoto fruit on the plant -- the source of its 'manzano' (apple) common name.

Rocoto flower close-up

A close view of the rocoto's star-shaped purple flower.

Rocoto flower and foliage

A rocoto flower against the plant's hairy, pubescent foliage.

Canned chile manzano

Preserved rocoto (chile manzano), a common way the fruit is sold and used in South American cooking.

References

1. Plants For A Future (PFAF) - Capsicum pubescens

   Suitable for light, medium or heavy soils, prefers well-drained soil, pH tolerance 4.3-8.3. Full sun essential, cannot grow in shade. Perennial to 3m x 2m. Sow seed late winter to early spring in a warm greenhouse; germinates in 3-4 weeks at 20C; prick out seedlings into individual pots, transplant outdoors after final frosts. Prefers consistently moist soil. USDA zones 8-11, hardy to UK zone 9, tolerates down to -5C. Flowers August-September, hermaphroditic, precede thick-walled pungent fruit used raw or cooked -- as a condiment, sauce ingredient, stuffed, baked, dried or ground into powder. Native to the Andes region of South America.

2. PMC (peer-reviewed journal, via NCBI) - Comprehensive Morpho-Functional Profiling of Peruvian Andean Capsicum pubescens Germplasm Reveals Promising Accessions with High Agronomic and Nutraceutical Value

   Andean domesticate cultivated at mid- to high elevations of the central Andes; one of five independently domesticated Capsicum species. Distinguished from related species by pubescent (hairy) leaves, purple flowers and black seeds -- unlike the white flowers and tan/yellow seeds of other cultivated Capsicum. Fruit colour ranges yellow to orange to red at maturity. Field trial (Arequipa, 1296m, arid climate, mean annual temp 19.2C): average plant height 92.65cm, maturation cycle around 248 days. Chemically distinctive: dihydrocapsaicin-dominant rather than the capsaicin-dominant profile of most other peppers. Commercial cultivation in Peru covers around 14,000 hectares farmed by over 11,000 smallholders, mainly in Pasco and Junin regions, producing over 200,000 tonnes/year.

2 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.