How to Grow Olive Tree
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Olive Tree
Olea europaea
treeThe olive tree is a long-lived, drought-tolerant Mediterranean native that produces small stone fruits used for oil extraction and culinary purposes. Known for its silvery-green foliage and gnarled trunk, it can live for centuries and becomes increasingly productive with age. Olive trees are prized both for their abundant harvests and their ornamental landscape value.
When should you plant Olive Tree in your zone?
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Example Olive Tree timeline · Pittsburgh, PA (Zone 6b)
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Plant Olive Tree
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 Olive Tree
Late summer into fallBefore the first fall frost (≈ Nov 8)
Sample dates for Pittsburgh, PA. Sign up to get exact Olive Tree dates for your own zip code.
Growing Conditions
Soil
Growing Zones
Find your zone →Thrives in zones 8-11; some cold-hardy varieties tolerate zone 7b with protection
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Get my Olive Tree timeline →Growth Stages
Establishment
2-3 yearsYoung sapling with developing root system and minimal branching; thin trunk and sparse foliage
Water regularly (weekly during first 2 years), provide shelter from harsh winds, establish main scaffold branches through light pruning, mulch around base to retain moisture
Vegetative Growth
3-5 yearsTree develops stronger branching structure and expands canopy; silvery-green leaves become more prominent
Prune to create open vase or multi-leader structure for light penetration, thin crowded branches, water deeply but less frequently as drought tolerance increases
Flowering
4-6 weeks in springSmall, creamy-white flowers appear in late spring on previous year's wood; flowers are inconspicuous but fragrant
Ensure adequate winter chill (200-300 hours below 45°F for most varieties), avoid over-fertilizing with nitrogen which inhibits flowering, maintain consistent watering during this period
Fruit Development
6-8 monthsGreen olives form and gradually enlarge over summer; color changes from green to red to black as they mature over several months
Thin fruit if necessary for larger sizes, maintain consistent water during fruit development, avoid stress from drought or temperature extremes, hand-thin for premium fruit size
Harvest
Fall to early winter (September-December in Northern Hemisphere)Olives reach full maturity with deep black color; fruit has reached maximum size and oil content
Harvest by hand or with mechanical shakers onto tarps, handle gently to avoid bruising, process quickly for fresh olives or oil production, store harvested fruit in cool conditions
Companion Planting
Plan your garden →Plant with:
Avoid planting near:
Common Pests
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Use pheromone traps for monitoring, apply approved insecticides in late summer, harvest fruit promptly, remove fallen fruit from ground
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Apply horticultural oil spray in winter during dormancy, prune heavily infested branches, encourage natural predators like ladybugs
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Prune out infected branches (6 inches below visible disease), sterilize pruning tools between cuts, apply copper fungicide to cuts, improve air circulation
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Plant resistant rootstocks, ensure excellent drainage, avoid overhead watering, remove infected trees completely, practice crop rotation in orchard
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Spray water forcefully to dislodge, apply horticultural oil or sulfur-based fungicides, maintain adequate humidity, monitor during dry periods
Uses
Olive oil production
CulinaryOlives are cold-pressed to produce extra virgin olive oil, one of the world's most valuable culinary oils. Rich in antioxidants and monounsaturated fats, olive oil is essential to Mediterranean cuisine. [source]
Table olives and curing
CulinaryFresh olives are cured with salt, lye, or brine to remove bitter compounds, creating crisp, briny table olives for snacking or cooking. Varieties differ in flesh-to-pit ratio and final flavor. [source]
Heart health and anti-inflammatory
MedicinalOlive oil and olives contain polyphenols and oleic acid with documented cardiovascular benefits and anti-inflammatory properties. Regular consumption is linked to reduced risk of heart disease in Mediterranean diet studies. [source]
Cosmetic and skincare
HouseholdOlive oil is used in traditional and modern skincare products for its emollient, antioxidant, and anti-aging properties. Applied topically, it moisturizes skin and supports natural skin barrier function. [source]
Ornamental landscape tree
CraftAncient, gnarled olive trees are prized for Mediterranean and contemporary landscape design, adding sculptural form, silvery foliage, and timeless aesthetic appeal to gardens and estates. [source]
This is not medical advice. LizPlants is not a medical resource. Always consult a qualified healthcare professional before using plants medicinally.
Harvest Tips
Harvest when olives have turned deep purple-black (late autumn to early winter), indicating peak oil and maturity. Pick by hand for table olives to minimize bruising, or use mechanical harvesters for oil production. Green olives (early harvest) have more bitter/herbaceous flavor; black olives are milder and oily. Process fresh fruit within 24 hours for best quality. A mature tree produces 33-110 pounds of olives annually.
Fun Facts
- 🌱 Olive trees can live for over 1,000 years and remain productive throughout their ancient lives; some Mediterranean groves contain trees that are documented to be over 2,000 years old.
- 🌱 The olive branch is a universal symbol of peace and was famously returned to Noah's ark by a dove, making it one of history's most enduring peace symbols.
- 🌱 A single mature olive tree can produce enough fruit to make up to 5 liters of premium extra virgin olive oil in a good harvest year, yet some years alternate between heavy and light bearing cycles.
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