do NOT fertilize recent transplants

their need is water.. not organic chemistry ...

i grow in mineral sand.. and have NEVER fed a conifer in my life.. they simply dont need it ...

and fert will not aid in getting over the stress of transplant.. which will take up to two years ... on a 6 foot tree

ken

Just to add to Ken's comments.....one doesn't fertilize to stimulate rapid growth. If fertilizing is required, it is done in response to a deficiency of necessary nutrients. Fertilizing for fast growth - and that means faster than typical growth - often results in the development of weak wood and highly succulent growth more easily prone to insect and disease problems. And Leylands grow faster than greased lightening anyway. Just water well through summer and stand back!

If there is foliage discoloration then you would want to fertilize - regardless of how recently they were planted. There is nothing to be gained from letting them sit there for months or years in a stunted condition, because it hadn't been one or two years yet since they were planted.

However, you would first want to determine that the discoloration was in fact the cause of the poor coloring, typically by sampling the soil and having it analyzed by a soils lab. Impeded drainage, pests and pathogens can also cause foliage discoloration.

If instead they look as green as you have ever seen this tree then the implication is they don't need fertilizer.