Role of Nutrients by Wine Grape Growth Stages
Winter Rest – Budbreak
- Nitrogen and Potassium – promote strong early growth and maximize leaf area
- Phosphorus – maintain long-term productivity
- Calcium - boost new leaf and bud growth
- Magnesium – maximize photosynthetic activity and early growth
- Sulfur and Manganese – maximize photosynthetic activity
- Iron – strengthen leaf development and vine productivity
- Boron and Zinc – ensure good shoot growth and strong fruit set
- Molybdenum – maximize floral development
Berry Set - Veraison
- Nitrogen – ensure strong set and early grape growth
- Potassium – maximize growth potential
- Calcium – maintain healthy vine growth and grape production
- Magnesium – maintain growth and berry development
- Boron and Zinc – maximize healthy berry development
Veraison – End of Harvest
- Nitrogen – foliar forms to maximize crop potential and improve grape color
- Potassium – ensure good, strong fruit-fill, increase grape sugars, and provide a high K:N ratio to minimize botrytis
- Calcium – ensure strong skins and minimize fruit disorders and diseases
- Magnesium – minimize bunch stem necrosis
- Boron – improve berry shape, size and sugars
- Zinc and Iron – increase grape sugars
Post Harvest
- Nitrogen – build vine reserves before dormancy
- Phosphorus – build root system after harvest
- Calcium - boost root development and wood maturity (winter hardiness) after harvest
