What Kind of Fertilizer and How Much to Apply for Green Giant Arborvitae Thuja and Murray Cypress?
Even most good things have a ceiling, a volume beyond even a good thing fails to deliver a positive impact and is probably even harmful.
When it comes to compost and manure, spread all you want on top of the soil. It is impossible to hurt trees by this method. It would not be unusual to see a tree on a farm right next to the manure pile and no harm done.
It is a much more delicate issue when we fertilize with inorganic fertilizers bought at a store. A good fertilizer to use is 10-10-10 as it is inexpensive and works well.
“Triple ten” fertilizer, if you have trees you should never run out of it.
A rule of thumb is to apply about a single fistfull at the base of the tree four times a year. For larger trees this can be more, but instead of throwing a double fistful at the base of the tree, it would be more prudent to use a spreader.
It is important to note that trees will survive even without fertilizer, but will not reach their best growth rate. Such would be around 4 feet a year for Green Giant Arborvitae (Thuja) or Murray Cypress. Without fertilizing they may grow only at 50% speed.