Question

is phosphorus needed in plant growth

Answer 1

yes phosphorus is needed in plants growth. It helps the to plant convert other nutrients into usable building blocks which helps to grow.
  i hope it helps...........................^_^

Answer 2

Yes.Phosphrous is an important component for the growth of plant.For example the fertilizer NPK which contains Nitrogen,Pottassium,Phosphrus. Hope it helps and pls mark as the best answer. :-)