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goldenrod 173x230 173x230
(Image credit: only_fabrizio)

It's not a "little orange" as the common name suggests in Spanish. Instead, the naranjilla is a fascinating heirloom plant with fantastic foliage and delicious, citrus-like fruit. Read on for more information about this fruit tree.

History of Naranjilla

The naranjilla (Solanum quitoense) is not in the citrus family. It's a member of the nightshade clan, a botanical cousin of the tomato and eggplant. Native to the mountains of Central and South America, this plant grows abundantly in the wild in Peru, Ecuador and southern Colombia. Both Columbia and Ecuador gifted seeds to the United States in the early 1900s. The shrubs have been cultivated successfully in Florida ever since. Why is this tree named after the orange ("naranja" in Spanish)? Because it produces round, orange fruit that looks like small oranges and taste like a cross between a pineapple and a lemon. They are called naranjillas or lulos, among other common names.

Naranjilla Plant Information

The naranjilla plant is an attractive bush or small tree, growing to 8 feet tall. The "trunk" is a thick stem. It is covered with spines in the wild but many cultivars are spineless. The narajilla blossoms are striking. You'll see five white petals on top with imposing stamen that are marigold yellow. Under these are bright purple petals. The flower's fragrance is appealing as well. Leaves grow in a deep purple. They are heart shaped and grow quite large over the life of the plant"”up to 24 inches long. Their texture is soft and wooly. Most gardeners cultivate the naranjilla plant for its round fruit. The fruit is not large, growing only 2 or 3 inches in diameter. The leathery peel covering each naranjilla turns orange as the fruit matures. Until then, the fruit is covered in thick brown hairs, not unlike kiwi fruit. The fruit flesh is yellowy orange, and contains a ring of juicy pulp dotted with thin seeds.

Naranjilla Growing Conditions

The shrub is found in the semi-tropics at elevations of 3,000 to 8,000 feet. It is picky about temperatures. It thrives where the temperature stays between 62 and 66 degrees Fahrenheit (16-18 C.), and doesn't tolerate temperatures above 85 degrees F. (29 C.). Naranjillas need high humidity to thrive. They do best in semi-shade.

Teo Spengler
Writer

Teo Spengler has been gardening for 30 years. She is a docent at the San Francisco Botanical Garden. Her passion is trees, 250 of which she has planted on her land in France.