Fertilising guide

How to fertilise Kalamata olive (Olea europaea 'Kalamata')— schedule & NPK

Also called Kalamata olive, Greek olive, Calamata olive.

More about kalamata olive

About Kalamata olive

Olea europaea 'Kalamata' · also called Kalamata olive, Greek olive · edible

Kalamata is a renowned Greek table olive cultivar named after the city of Kalamata in the Peloponnese. Its large, almond-shaped, dark purple-black fruit has a rich, fruity flavor that makes it the defining ingredient of Greek-style olives. The tree is vigorous, alternate-bearing, and relatively cold-hardy for an olive. It requires hot dry summers and excellent drainage to thrive.

Growth habit: Evergreen medium to large tree with a broad, spreading crown; alternate-bearing — heavy crops one year followed by a lighter crop the next; more upright habit than some cultivars

What fertiliser kalamata olive actually wants — and why

Kalamata olive is grown entirely for its leaves, so nitrogen is the priority — steady, nitrogen-leaning feeding keeps it growing fast, tender and unbolted.

For the language behind the three numbers on the bottle — what nitrogen, phosphorus and potassium each do — see the NPK ratio explained entry. The short version for kalamata olive: match the feed to the job the plant is doing right now, not to a generic “plant food” on the shelf.

How often to feed kalamata olive, and which months

Feeding only earns its keep while the plant is in active growth and can use the nutrients — pour feed into a dormant or low-light plant and it simply builds up as root-burning salt. For kalamata olive:

The dormant-season rule matters more than the exact interval: skip feeding entirely when kalamata olive is resting. For the wider context on indoor feeding rhythms across the seasons, the houseplant fertiliser schedule walks through the year month by month.

What strength to mix for kalamata olive

Use the vegetable-feed label rate for kalamata olive. Steady availability matters more than a strong dose — a check in growth makes leaves tough and can trigger bolting.

Feeding always goes onto already-damp soil, never dry roots — water kalamata olive first if the soil is dry, then apply the diluted feed. The companion question is when to water at all, covered in the kalamata olive watering schedule.

Signs you are over-feeding kalamata olive

Over-feeding is far more common — and more damaging — than under-feeding for most plants. The classic tells for kalamata olive:

Very soft, floppy, dark-green growth that attracts aphids.
Excess leafy growth at the expense of hearts/heads in cabbage and the like.
Salt crust and scorched leaf edges in containers; nitrate-heavy leaves.

Signs you are under-feeding kalamata olive

Pale, yellow-green leaves, oldest first, and slow growth.
Small, tough, bitter leaves and premature bolting.
Weak, stunted heads in cabbage, broccoli and cauliflower.

If the symptoms point at watering, light or roots rather than nutrition, the full kalamata olive care brief covers soil, humidity and the common problems for this species.

Flushing and leaching the salts

For container-grown kalamata olive, water until it drains freely each time and flush pots monthly with plain water to stop nitrogen salts accumulating; in the ground, good compost levels naturally buffer this.

Organic vs synthetic feeds for kalamata olive

Organic options

Well-rotted manure or compost dug in, plus nitrogen-rich liquid feeds like diluted chicken-manure pellets or nettle feed. UK: pelleted chicken manure or Westland; US: Espoma Garden-tone or blood meal. Steady and soil-building.

Synthetic / liquid feeds

A balanced feed at planting then a high-nitrogen liquid or granular side-dress — UK: Growmore then a nitrogen feed or Phostrogen; US: a 10-10-10 then a high-N (e.g. 21-0-0) side-dress or Miracle-Gro.

Brand names are examples, not endorsements, and UK and US ranges differ — check the label’s own NPK and dilution rate, since formulations change.

Fertilising kalamata olive — frequently asked questions

What fertiliser does kalamata olive need?

A nitrogen-leaning feed (higher first number) or compost-rich soil — nitrogen drives the fast, tender leafy growth this crop is grown for. Phosphorus and potassium matter far less here than for fruiting crops. Kalamata olive is grown entirely for its leaves, so nitrogen is the priority — steady, nitrogen-leaning feeding keeps it growing fast, tender and unbolted.

How often should I feed kalamata olive?

Apply a slow-release balanced granular fertilizer (10-10-10 or similar) at bud break in early spring, at 0.5–1 kg per mature tree. A second potassium-rich feed in early summer (e.g., sulfate of potash) improves fruit color and oil content. Avoid high-nitrogen feeds after midsummer. Apply a slow-release balanced granular fertilizer (10-10-10 or similar) at bud break in early spring, at 0.5–1 kg per mature tree. A second potassium-rich feed in early summer (e.g., sulfate of potash) improves fruit color and oil content. Avoid high-nitrogen feeds after midsummer. In practice: a balanced or compost-rich start, then a nitrogen side-dress or liquid feed every 3-4 weeks through the cropping period in the main season (spring through early autumn).

What strength of feed for kalamata olive?