Hello i have recently planted fruit trees and my plum and apple trees have developed yellow leafs can anybody shed light on this as i am a complete novice in the gardening world Thanks
This sounds like an Iron or Magnesium deficiancy, You need to water on the soil around the base of the trunks with 'Multi Tonic', a good Garden Centre should sell it, and the pack will have the frequency of doses on it. Good Luck.