How to Grow Ascolano Olive
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Ascolano Olive
Olea europaea 'Ascolano'
treeAscolano is a large, early-maturing olive cultivar prized for green-olive table production. Known for its large, meaty fruits and high yield, it is one of the most commercially important olive varieties worldwide. The tree is vigorous and productive, making it ideal for both commercial and home growers.
When should you plant Ascolano Olive in your zone?
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Example Ascolano Olive timeline · Pittsburgh, PA (Zone 6b)
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Plant Ascolano Olive
Around Apr 17Near Pittsburgh's average last spring frost.
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Tend & protect
Late spring–summerWatering, feeding, and pest-watch reminders.
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Harvest Ascolano Olive
Late summer into fallBefore the first fall frost (≈ Nov 8)
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Growing Conditions
Soil
Growing Zones
Find your zone →Thrives in zones 8b-11, though best production occurs in zones 9-10. Can tolerate brief freezes to 15°F (-9°C) but sustained cold damages productivity.
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Get my Ascolano Olive timeline →Growth Stages
Establishment
2-3 yearsYoung tree developing root system and main scaffold branches; minimal flowering.
Water regularly; prune to establish open vase structure with 3-4 main scaffold branches. Stake if necessary. Remove flower buds first 2-3 years to redirect energy to growth.
Vegetative Growth
2-3 yearsTree rapidly increasing in height and branch development; slow initiation of flowering.
Continue structural pruning. Thin branches to improve light penetration. Reduce nitrogen fertilizer. Begin allowing some flowering.
Flowering
3-4 weeks in springSmall, creamy-yellow flowers appear in spring on previous year's growth; flowers are wind-pollinated.
Minimize pruning during flowering period. Do not apply nitrogen; maintain consistent moisture. Ascolano is partially self-fertile but benefits from cross-pollination with compatible varieties like Mission or Manzanillo.
Fruit Development & Green Harvest
6-10 weeks post-floweringGreen olives swell rapidly; Ascolano reaches table-size (6-8 grams) within 6-8 weeks of flowering, earlier than most varieties.
Green olives should be harvested when firm but before color turn toward purple. Thin fruit if excessive set occurs (every 4-6 inches). Maintain consistent watering to prevent splitting.
Harvest & Post-Season
4-6 weeks; varies by climatePeak harvest of large green olives; tree energy shifts to recovery and next season's bud development.
Hand-harvest or use mechanical harvesters for green olives. Prune lightly after harvest to remove dead wood and thin interior. Reduce water and nitrogen; allow slight moisture stress to promote flowering.
Companion Planting
Plan your garden →Plant with:
Avoid planting near:
Common Pests
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Use pheromone traps; apply spinosad or pyrethrin-based insecticides; practice sanitation by removing fallen fruit; encourage parasitic wasps like Psyttalia species
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Horticultural oil spray in winter; remove heavily infested branches; introduce predatory beetles like Lindorus lophantae
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Prune out infected branches; disinfect pruning tools with bleach; avoid overhead watering; apply copper-based fungicides on wound sites
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Ensure good air circulation through pruning; apply copper fungicide in humid seasons; remove infected leaves; avoid overhead irrigation
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Spray with water to dislodge; apply neem oil or horticultural soap; maintain adequate humidity; encourage predatory mites
Uses
Green table olives
CulinaryAscolano olives are world-renowned for table consumption, prized for their large, meaty flesh, mild flavor, and firm texture. They are traditionally cured and served as aperitives or used in salads and Mediterranean cuisine. [source]
Olive oil production
CulinaryWhile primarily a table olive, Ascolano fruit can be processed for oil. Green-harvested olives produce light, fruity oil with grassy or herbal notes, though oil yield is lower than oil-specific cultivars. [source]
Landscape and ornamental value
HouseholdThe Ascolano olive tree's silvery-green foliage, gnarled trunk, and architectural form make it highly valued as an ornamental specimen in Mediterranean and drought-tolerant gardens. Its long lifespan and character increase property value. [source]
Antioxidant compounds
MedicinalOlive leaves and fruits are rich in polyphenols, including oleuropein and hydroxytyrosol, which possess anti-inflammatory and antioxidant properties studied for cardiovascular and metabolic health benefits. [source]
Wildlife habitat and food
WildlifeOlive trees provide nectar and pollen for pollinators during spring flowering and fruit for birds and small mammals. The dense canopy offers shelter for various species in Mediterranean ecosystems. [source]
This is not medical advice. LizPlants is not a medical resource. Always consult a qualified healthcare professional before using plants medicinally.
Harvest Tips
Green olives (table olives) are harvested 6-8 weeks after flowering when large, meaty, and still green but firm to touch. Pick by hand to avoid bruising, or use mechanical harvesters for commercial scale. Harvest between September-November in Northern Hemisphere. Olives must be cured (brined, dry-cured, or lye-treated) before eating to remove bitterness. Ascolano's large size and early maturity make it ideal for fresh green-table use. A mature tree yields 60-150 pounds of fruit annually.
Fun Facts
- 🌱 Ascolano olives are named after Ascoli Piceno in Italy's Marche region, where they originated centuries ago. They are called 'Ascolana' in Italian and are protected by geographical indication (IGP) status in the Marche region.
- 🌱 Ascolano is one of the earliest-maturing olive varieties, producing table-sized green olives 6-8 weeks after flowering—weeks ahead of other cultivars like Manzanillo—making it commercially valuable in regions with shorter growing seasons.
- 🌱 Olive trees are extraordinarily long-lived; some Ascolano trees in Mediterranean regions are over 500 years old and still productive. Their extreme drought tolerance and low maintenance make them among the most durable food-producing trees in cultivation.
Gardening Terms
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