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Last edited on February 03, 2024. View history

Naranjilla

Also known as lulo (en)

How to sow naranjilla: Direct seed, seedlings, air layering, cuttings

Sun requirement for naranjilla: Plant in Partial Sun

Naranjilla, or Lulo, is a subtropical perennial shrub in the Nightshade or Solanaceae family grown for it's round, yellow-orange fruit. It is native to northwestern South America. The plant's stem and large, elongated heart or oval-shaped leaves are covered in short purple hairs. Some varieties have spiny stems. The plant takes 10-15 months to bear 100-150 fruit in it's first year. Naranjilla will bear fruit for 3 years. Fruit are 5cm in diameter and covered in brown hairs that are easily rubbed off to expose the yellow-orange skin. The juicy, seedy interior is green to yellow and has a citrus flavor similar to rhubarb and lime or pineapple and lemon. Fruit can be eaten raw, juiced, or added to desserts. It is quite sour if it is not ripe. Naranjilla benefit from trellising and must be protected from strong winds, direct sunlight, and frosts. Their ideal temperature range is 17-19° C. Naranjilla are susceptible to nematodes and can be grown in containers for protection.

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Naranjilla facts

Lifespan

Annual living and reproducing in a single year or less

Height × spread

240cm × 240cm
Optimal temperature 15–25 °C
Absolute temperature 10–30 °C
FAO EcoCrop
Optimal rainfall 1500–3000 mm/year
Absolute rainfall 700–3750 mm/year
FAO EcoCrop
Optimal soil pH 6.5–7
Absolute soil pH 5.8–8
FAO EcoCrop

Crop cycle

180–365 days
FAO EcoCrop

Max altitude

2500 m
FAO EcoCrop

Optimal light

clear skies to cloudy skies
FAO EcoCrop
What are growing degree days?

A plant grows with warmth, not with days. A growing degree day is one day's worth of useful warmth: how many degrees the day's average temperature is above the lowest temperature the crop grows at. Add them up from planting and you know how far along the crop is, whatever the calendar says.

Say that lowest temperature is 10°C. A day averaging 17°C gives 7 growing degree days. A day averaging 8°C gives none, as it is too cold for the crop to grow. That is why the same lettuce takes about 50 days in a summer and 90 in an autumn: it needs the same total warmth either way.

For naranjilla, the FAO EcoCrop database gives a lowest growing temperature of 10°C and a shortest growing cycle of 180 days at its best temperature, about 1800 growing degree days to a first harvest.

Where you've told us where your garden is, we use this and the weather there to predict when your naranjilla will be ready to harvest. We don't use it for how long a plant lives or when it finishes: we go by what members have logged for that.

Photos

Naranjilla crops

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Time to harvest

If sown now, expect a first harvest in about 180 to 365 days.

From the growing cycle in the FAO EcoCrop database, which is the same wherever it is grown.

Ecological requirements

Data from the FAO EcoCrop database for Solanum quitoense Lamarck

Family / Taxonomy Magnoliopsida
Asteridae
Solanales
Solanaceae
Life form sub-shrub
Life span perennial
Habit erect
Optimal soil depth medium (50-150 cm)
Optimal soil texture heavy, medium, light, organic
Optimal soil fertility high
Optimal soil drainage well (dry spells)
Optimal soil salinity low (<4 dS/m)
Photoperiod short day (<12 hours), neutral day (12-14 hours)

Learn more about naranjillas

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