Crop Builder Onion & Garlic Feed

Crop Builder Onion, Garlic & Leek Feed

Crop Builder Onion, Garlic & Leek Feed is a specialist, all-season fertiliser formulated to meet the specific nutritional needs of bulb and root crops. With a balanced blend of nutrients and a high phosphorus content, it promotes strong root establishment and consistent bulb development for reliable, high-quality yields. Perfect for Onions, Garlic, Leeks, Shallots and other alliums.

Containing an NPK ratio of 5-19-10 + 3Mg, this fertiliser delivers the ideal balance of nutrients for sustained growth. The phosphorus supports deep root and bulb formation, potassium strengthens plants against disease, and nitrogen encourages healthy top growth. Added magnesium enhances leaf colour and photosynthesis, helping plants make the most of every ray of light.

Application rate: Apply evenly at 70–100g per m² before sowing or planting and lightly work into the soil. For established crops, apply every 4–6 weeks during the growing season as a top dressing. Water in thoroughly after application to activate nutrients.

Also highly effective as a base fertiliser or top dressing for trees, shrubs and hedges, and when re-seeding turf. Suitable for use in vegetable beds, raised planters and allotments.

Common Questions

When should I use Crop Builder Onion, Garlic & Leek Feed? Apply before planting to prepare the soil and again during the growing season to maintain steady growth and bulb development.

Is it suitable for all alliums? Yes. It’s perfect for onions, garlic, leeks, and shallots, promoting strong roots and large, healthy bulbs.

Can I use it on other plants? It’s also effective for trees, shrubs, hedges and lawns, especially when re-seeding or encouraging new root growth.

Why does it include magnesium? Magnesium improves chlorophyll production, keeping leaves green and efficient at producing energy for healthy crops.