Symptoms
Plants show red discoloration on the edges of older leaves, with a yellowgreen transition zone. Leaf size is not affected.
Reasons
Phosphorus deficiency (right)
Phosphorus is important during early growth, especially for root development. However, deficiency is rarely seen as brassicas are efficient in extracting P from soil. Undersupply is often connected with cold soils and drought.
Broccoli is more sensitive to P deficiency than cauliflower, cabbage and brussel sprouts.
Broccoli - Discolouration
Symptoms
Plants show red discoloration on the edges of older leaves, with a yellowgreen transition zone. Leaf size is not affected.
Reasons
Phosphorus deficiency (left)
Phosphorus is important during early growth, especially for root development. However, deficiency is rarely seen as brassicas are efficient in extracting P from soil. Undersupply is often connected with cold soils and drought.
Broccoli is more sensitive to P deficiency than cauliflower, cabbage and brussel sprouts.
Broccoli - Discolouration
Symptoms
Plants show red discoloration on the edges of older leaves, with a yellowgreen transition zone. Leaf size is not affected.
Reasons
Phosphorus deficiency (left)
Phosphorus is important during early growth, especially for root development. However, deficiency is rarely seen as brassicas are efficient in extracting P from soil. Undersupply is often connected with cold soils and drought.
Broccoli is more sensitive to P deficiency than cauliflower, cabbage and brussel sprouts.
Broccoli - Growth retardation
Symptoms
Plants show red discoloration on the edges of older leaves, with a yellowgreen transition zone. With severe P deficiency leaf size and plant growth are stunted.
Reasons
Phosphorus deficiency (right)
Phosphorus is important during early growth, especially for root development. However, deficiency is rarely seen as brassicas are efficient in extracting P from soil. Undersupply is often connected with cold soils and drought.
Broccoli is more sensitive to P deficiency than cauliflower, cabbage and brussel sprouts.
Broccoli - Discolouration
Symptoms
Starting from the leaf margins, affected plants show red discoloration on older foliage. With severe P deficiency leaf size and plant growth are stunted.
Reasons
Phosphorus deficiency
Phosphorus is important during early growth, especially for root development. However, deficiency is rarely seen as brassicas are efficient in extracting P from soil. Undersupply is often connected with cold soils and drought.
Broccoli is more sensitive to P deficiency than cauliflower, cabbage and brussel sprouts.
Phosphorus deficiency vs. healthy plant made worse by
Acidic or very alkaline (calcareaus) soils
Low organic matter
Cold or wet conditions
Crops with a poorly developed root system
Soils with low P reserves
Soils with a high phosphate capacity
Iron rich soils
Phosphorus is important for
Early growth, especially for root development
Increases vigor in shorter season crops especially in adverse conditions
Improves marketable yield
Yara recommended fertilizers for Phosphorus
YaraMila™ UNIK™ 16
Broccoli:
Apply 5-10 grams per hill at transplanting.