Olive is a drought-tolerant perennial tree whose yield and oil quality improve markedly with balanced nutrition. One of its biggest challenges is alternate bearing (on-year/off-year); the right nutrition softens this swing. This guide presents a stage-by-stage olive fertilization program with product recommendations.
The Foundation: Soil Analysis
Olive mostly grows on calcareous, poor soils, which makes managing elements like boron and iron important. The program should start with a soil analysis, with results interpreted by our agricultural engineers.
Fertilization Program by Growth Stage
1. Spring Shoot and Flowering Stage
Boron and amino acids are critical for flower bud development and flowering; boron deficiency causes flower and set loss. Apply Power NPK for balanced macronutrients and AminoWork for flowering and stress. AminoWork also helps soften the on-year/off-year swing.
2. Fruit Set Stage
In this set-determining stage, amino acid and boron support reduce physiological drop. Avoid excess nitrogen, which can boost vegetative growth and weaken set.
3. Pit Hardening and Fruit Growth Stage
Balanced nutrition continues here while avoiding water and nutrient stress. For stress resistance and trace-element uptake, seaweed-based RapidAlg is beneficial.
4. Oil Accumulation and Ripening Stage
Potassium drives oil content and fruit quality, so potassium-led nutrition supports oil accumulation. Nitrogen is reduced in this stage.
5. Post-Harvest
After harvest, the tree's recovery and nutrient storage for next year matter; balanced support reduces alternate bearing.
Common Nutrient Problems in Olive
- Boron deficiency: reduced flower and fruit set and shoot-tip disorders; boron management before flowering is essential.
- Iron chlorosis: young-leaf yellowing on calcareous soils; corrected with FerroPlus (chelated iron).
- Copper deficiency: apply DoraCop foliarly; see the copper deficiency guide for symptoms.
Application via Fertigation
In modern drip-irrigated olive groves, delivering nutrients to the root zone saves water and fertilizer. For EC/pH management, see our fertigation guide, and for ratio selection the NPK selection guide.
Olive yield and oil quality come from boron at flowering, potassium at ripening, and a continuous, balanced nutrition that softens alternate bearing.
For a program tailored to your grove, contact us; share your soil analysis and we will build the plan together.
