NUTRIENT SYMPTOMS
Nitrogen (N) |
Visible on old leaves first, Uniform pale green colour. Small leaves, weak shoot growth. Small fruit with good red colour. |
Phosphorus (P) |
New leaves small, bluish green. Purple leaf veins, margins. Soft flesh on stonefruit. Not a big problem for fruit. |
Potassium (K) |
Visible on old leaves first. Small leaves with curled or rolled edges, especially on peaches or pears. Abundant flowers but poor fruit set. Small fruit with poor colour. |
Calcium (Ca) |
Symptoms often visible on fruit first as cork spot or bitter pit. Appears on new leaves first. Yellowed leaf margins. Shoot dieback.. |
Magnesium (Mg) |
Shows up on middle age and old shoots first. Yellowed margins and area between veins. Premature fruit maturity and fruit drop. |
Sulphur (S) |
Uniform yellowing of leaves. Leaves often take on an orange/red cast. Thin woody shoots. |
Boron (B) |
Small misshapen young leaves. Abnormal flower development. Fruit and/or bark corking. Wilting & shoot dieback. |
Copper (Cu) |
Whitish colour between leaf veins. Tip wintering and leaf fall. Poor fruit set. Small, poor quality fruit. |
Iron (Fe) |
Seen in tip leaves first. Netted yellowing pattern. Leaf tips and margins die. |
Manganese (Mn) |
Occurs on older, mid shoot leaves first. Bands of yellow between veins. Paper thin leaves. Poor fruit size and colour. |
Zinc (Zn) |
Leaves on tip of branch stunted. Grow in tight rosetee. Irregular, rolled leaf margins. Poor bud break. Reduced colour set on some but not all branches. |