Kalamata Olive Tree (Olea europaea ‘Kalamata’)

Last updated: November 3, 2026

Kalamata (Olea europaea ‘Kalamata’, also called Kalamon) is a Greek olive cultivar named for the city of Kalamata in the southern Peloponnese, where it has been grown for generations as one of the world’s best-known table olives. It is instantly recognizable by its large, dark purple-black, slightly almond-shaped fruit with smooth, glossy skin — the classic olive found in Greek salads and Mediterranean cooking.

Gardeners in warm, dry climates grow Kalamata primarily for home-cured table olives rather than oil, since the fruit’s relatively low oil content makes it far better suited to curing than pressing. The tree itself has an attractive, moderately spreading form with narrow, willowy leaves that give it an airy, graceful look even without fruit.

Olive (Olea europaea) is not native to North America; it is native to the Mediterranean basin and the Near East, and Kalamata itself is a Greek cultivar tied to the Kalamata region. It carries no federal noxious-weed listing, but Cal-IPC lists olive as a limited-impact invasive in parts of coastal and central California, where birds spread fruit from fruiting trees into nearby wildlands. In that region, harvest fruit each year and keep plantings away from natural areas; elsewhere, winter cold prevents the species from naturalizing.

Identification

Bark & Stems

Young branches are gray-green, aging to grayish, furrowed bark on older wood. Kalamata develops a moderately spreading, somewhat open canopy rather than the dense habit of cultivars like Leccino.

Leaves

Leaves are narrow and lance-shaped, typically 1.5 to 3 inches long, dull gray-green above and silvery beneath, giving the canopy a soft, shimmering texture in breezy conditions — a trait often described as “willowy” in Kalamata specifically.

Flowers

Small, cream-white flowers bloom in loose clusters at the leaf nodes in late spring, generally May into June, and are primarily wind-pollinated with some insect visitation. Kalamata sets some fruit on its own, but yields improve with a nearby pollinizer cultivar such as Mission or Manzanillo.

Fruit & Seeds

The signature feature of this cultivar is its fruit: large, dark purple to nearly black when ripe, with a smooth, glossy skin and a characteristic slightly asymmetrical, almond-like shape. Oil content is comparatively low, so Kalamata is grown almost exclusively as a table olive rather than for pressing. Traditional Greek curing — often slit or cracked, then cured in wine vinegar or brine — is what produces the familiar Kalamata olive of the supermarket shelf.

Origin & Where It Grows

The species Olea europaea is native to the Mediterranean basin, the Near East and parts of the Horn of Africa; it has no native range in North America.

The Kalamata cultivar takes its name from Kalamata, a city in the southern Peloponnese region of Greece, long famous for producing this style of large, dark table olive. Within the European Union, “Kalamata” carries protected designation of origin (PDO) status tied to olives actually grown in that Greek region; in the United States and some other countries, the name is used more generally for the cultivar itself regardless of where it is grown, and is also sold under the name Kalamon.

In American gardens, Kalamata grows best in the same warm, dry, Mediterranean-type climates favored by other olive cultivars: California’s Central Valley and coastal regions, parts of Arizona, and the warmest zones of Texas, Georgia and Florida. It is somewhat more cold-sensitive and prone to Verticillium wilt in poorly drained soils, so site selection matters.

Growing & Care Guide

Kalamata rewards gardeners who can give it a true Mediterranean climate: hot, dry summers, mild winters and well-drained soil.

Light

Full sun is essential — at least 6 to 8 hours of direct light daily — for good flowering and fruit set.

Soil & Water

Plant in well-drained soil; Kalamata is particularly prone to root and crown problems, including Verticillium wilt, in heavy or poorly drained ground, so avoid low spots that stay wet. Water regularly through the first two to three years, then reduce — established trees are drought tolerant, though even watering during bloom and fruit development helps fruit size.

Planting Tips

Plant in spring to allow roots to establish before winter. Space trees 15 to 20 feet apart, and where possible plant near a different cultivar, such as Mission or Manzanillo, to improve pollination and fruit set. Choose a warm, sheltered, well-drained site, especially in zone 9 locations prone to occasional hard frost.

Pruning & Maintenance

Prune in late winter to early spring, removing crossing or crowded branches and opening the canopy to light since olives fruit on the previous year’s wood. Kalamata’s naturally airier form needs less aggressive thinning than dense cultivars. Fertilize lightly in spring; avoid overwatering and overfeeding, both of which can encourage fungal problems in this cultivar.

Propagation

Kalamata does not come true from seed; seedlings vary widely and lose the parent’s fruit size, shape and color. Propagate from rooted cuttings or by grafting onto olive rootstock for reliable, true-to-type trees.

Harvest & Pollination

Kalamata sets some fruit on its own but benefits from cross-pollination with a nearby cultivar such as Mission or Manzanillo for a fuller crop. Harvest for table use while olives are still firm and turning color, typically from green-purple through fully dark purple-black depending on the style of curing desired. Traditional preparation involves slitting or cracking the skin, then curing in brine or wine vinegar for weeks to months — all raw olives, including Kalamata, are too bitter to eat straight off the tree and must be cured before eating.

Landscape Uses

• Mediterranean and xeriscape gardens, where its airy, willowy canopy adds texture alongside rosemary, lavender and santolina
• Home table-olive production, paired with a second cultivar for better pollination
• Specimen or accent tree for its graceful, slightly weeping form
• Container growing in borderline zones, moved under cover in hard winters

Wildlife & Ecological Value

Kalamata’s small, wind-pollinated flowers provide limited nectar for bees and flies compared with native flowering trees. Ripe fruit attracts birds such as robins, mockingbirds and starlings, which can carry seed into nearby land in mild-winter regions — part of the reasoning behind olive’s limited-impact invasive status in pockets of California. The evergreen canopy offers modest shade and shelter. As with other olive cultivars, Kalamata supports far fewer native insects than a comparable native tree and is best viewed as a food-producing landscape plant rather than a wildlife planting.

Native Alternatives

For a similarly drought-tolerant, airy-canopied tree, or to pair a true native alongside Kalamata, consider these North American species:

• Desert Olive (Forestiera neomexicana) — a tough Southwestern native shrub/small tree with fine, gray-green foliage
• Texas Olive (Cordia boissieri) — a drought-tolerant flowering small tree for warm Texas gardens
• American Sweet Olive / Devilwood (Osmanthus americanus) — a fragrant native evergreen in the same family, Oleaceae
• Honey Mesquite (Prosopis glandulosa) — a native, fine-leaved, drought-tolerant tree for hot, dry climates

History & Uses

Kalamata olives have been produced around the city of Kalamata in the southern Peloponnese for generations, and the name became internationally synonymous with large, glossy, dark table olives, especially in Greek cuisine — tossed in salads, folded into breads, and served as part of meze spreads. The fruit’s meaty texture and slightly almond-shaped form made it one of the most recognizable table olives worldwide.

Within the European Union, “Kalamata” is a protected designation of origin tied specifically to olives grown in that region of Greece; outside the EU, including in the United States, growers often use the name for the cultivar itself (also called Kalamon), wherever it is grown. In American gardens and small groves, Kalamata is planted almost exclusively for home curing rather than oil, given its comparatively low oil yield.

Frequently Asked Questions

Is Kalamata olive tree native to North America?
No. Olive (Olea europaea) is native to the Mediterranean basin, and the Kalamata cultivar originated near Kalamata, Greece. It is an introduced, cultivated tree in North America, not a federally listed invasive, though Cal-IPC lists olive as limited-impact invasive in parts of coastal/central California.

Can I use the name “Kalamata” for olives grown outside Greece?
In the United States, “Kalamata” is commonly used as the cultivar name regardless of where the tree is grown, and the same cultivar is also sold as Kalamon. Within the European Union, the name Kalamata carries protected designation of origin status tied to the Greek region itself.

Is Kalamata good for olive oil?
Not really — Kalamata has comparatively low oil content and is grown almost entirely as a table olive rather than for pressing.

Can I eat Kalamata olives straight from the tree?
No. Fresh olives of any cultivar, including Kalamata, are intensely bitter and must be cured — traditionally slit or cracked and soaked in brine or wine vinegar for weeks — before they are edible.

How cold-hardy is Kalamata?
Kalamata is best suited to USDA zones 9–10; it is relatively cold-sensitive compared with some other cultivars and can suffer damage in hard freezes, so plant it in a warm, sheltered spot in borderline zones.