Northern Trees

Question

In general, when does sap start to run and is that a good time to fertilize them? Thanks for your help.
Rosa

Answer 1

As the weather warms, sap in trees "runs". The best time to fertilize is when new growth is visible. Depending on the variety of plant, new growth will be leaves and/or blooms. Just as there are "morning" people and "evening" people, some plants leave dormancy sooner than others.