The Arbequina is hardy outdoors in USDA zones 8 to 10, where it can grow into a 15 to 30 ft. evergreen tree. In colder regions it does beautifully in a large container that summers outside in full sun and overwinters in a cool, bright, frost-free spot.
Planting
- Choose the sunniest position you have — olives need full sun (at least 6 to 8 hours) to ripen fruit and stay dense.
- Make sure the soil drains fast. Olives hate wet feet; on heavy clay, plant on a mound or amend generously with grit, or use a container with a free-draining mix.
- Dig the hole twice as wide as the rootball but no deeper, so the tree sits at the same level it grew in the pot.
- Set the tree, backfill with native soil, firm gently, and water in well to settle the roots and remove air pockets.
- Spread a couple of inches of mulch over the root zone to conserve moisture, but keep it pulled back a few inches from the trunk to prevent rot.
Care & maintenance
- Water. Water regularly the first year to establish roots, then ease off — established olives are drought-tolerant and prefer to dry out between deep soakings. Container trees need more consistent watering but must never sit in soggy soil.
- Feed. Feed lightly in spring with a balanced fertilizer or one formulated for fruiting trees; olives are not heavy feeders and over-feeding pushes soft growth at the expense of fruit.
- Light & temperature. Full sun is essential. Arbequina is among the more cold-tolerant olives but is damaged by hard freezes; in zones colder than 8, grow it in a pot and move it into a cool, bright, frost-free space (a garage window, sunroom, or unheated room) for winter.
- Prune. Prune in late winter or early spring to open the canopy to light and air, remove crossing or dead wood, and keep the size in check. Olives fruit on the previous season's growth, so prune to shape rather than shearing hard.
- Pollinate. Arbequina is self-fertile, so a single tree will bear. Planting a second compatible olive nearby, or simply being in a breezy spot, can still bump up fruit set.
- Pests & disease. Watch for scale, and in some regions olive fruit fly and the fungal disease peacock spot (olive leaf spot). Good air circulation, sun, and quick cleanup of dropped fruit and leaves go a long way.
- Harvest. Fruit ripens roughly July through October. Pick olives green for a milder cure or let them darken on the tree for richer, oilier fruit; raw olives must be cured (brine, water, or salt) before eating.