Nitrogen stimulates the growth on leaves and stems and increases the size of the plant.
Phosphates: stimulates root and stem growth and speeds up the flowering.
Potash: Stimulates the flowers and improves drought and disease resistance.
Calcium: Magnesium: Iron: Boron and Manganese: maintain the normal green colour of the foliage, Boron prevents leaflet distortion and calcium reduces die back on stems.
1)In Spring and then again in summer: apply 1oz of Powder or Granular fertiliser around each plant. This contains Nitrogen, Phosphate and Potash. Magnesium, iron and gypsum
2) Once in April/May/June & July: feed with a liquid fertilizer.
(such as bio plant food)
3) Then fortnightly between the applying 1 & 2 above, apply a foliar feeding, this is applied as a spray to the plant and is a supplement.
4) Mulch after pruning at the end of the flowering season.