Nutrients
Plums - Chlorosis
Symptoms
Symptoms start with marginal chlorosis on older leaves, spreading towards the inner area. Leaf veins and a seam along them remain green.
With ongoing deficiency, the leaf margins show dark brown, strictly delimited scorch.
Causes
Potassium deficiency
Plums - Chlorosis
Symptoms
Symptoms start with marginal chlorosis on older leaves, spreading towards the inner area. Leaf veins and a seam along them remain green.
With ongoing deficiency, the leaf margins show dark brown, strictly delimited scorch.
Causes
Potassium deficiency
Potassium deficiency made worse by
- Acidic soils (low pH)
- Sandy or light soils (leaching)
- Drought conditions
- High rainfall (leaching)
- or heavy irrigation
- Heavy clay (illite) soils
- Soils with low K reserves
- Magnesium rich soils
Potassium is important for
- More new growth in spring
- Leaves usually larger, greener and retained
- Fruit set increases
- Fruit larger with better colour and acidity
- Overall yield can increase, cold hardiness increases
