Plant guide:🥦 Broccoli
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⚠ Minor🩺
Nutrients
Yellowing Leaves — Nitrogen Deficiency in Broccoli
Commonly affects: Brassica oleracea var. italica (Broccoli)
Older leaves turn pale yellow-green uniformly while new growth stays a healthier colour, and overall plant size and head development are reduced.
Potential Causes
- 1Insufficient nitrogen for this heavy-feeding brassica
- 2Heavy rain leaching nutrients from the root zone
- 3Depleted soil that hasn't been amended with compost or fertiliser
Solution Steps
- 1Apply a balanced, nitrogen-rich fertiliser at planting and again mid-season
- 2Side-dress with compost or aged manure during active growth
- 3Feed consistently, since broccoli needs steady nutrition to develop a good-sized head
Prevention Tip
Broccoli is a genuinely heavy feeder — consistent nitrogen through the growing season, not just at planting, produces the best heads.
