During the flowering period the need for phosphorus and potassium increases more and more.

Flowering results in propagation, a large amount of genetic material (DNA) is built up and is accompanied by an increasing demand for energy.

Both the energy molecules and the DNA strands contain a large amount of phosphate.

Potassium is crucial for the transport of water and particles into the roots up to the leaves.

It also regulates the uptake of carbon dioxide and influences the photosynthetic capacity.