Time to act:
Mar, Apr, May, Jun, Jul, Aug, Sep, Oct, Nov
For plants to successfully grow, flower and fruit they need nitrogen, potassium, phosphorous and different trace elements. Without one or more of these, plants will start to display physiological symptoms – low nitrogen causes weak, yellow leaves, while a potassium deficiency results in poor harvests and discoloured foliage. Trace elements include manganese and iron, and it's deficiencies of these that are most frequently encountered, resulting in yellow leaves and brown edges.
In summer, raspberries fail to thrive, the crop is poor and the leaves have a general unhealthy look.
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