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Fertilizing Fir Trees

Steve-Maine

Steve-Maine

ArboristSite Operative
Joined
Feb 16, 2006
Messages
255
Location
Falmouth,ME
When I had my tree service over 20 years ago we used 10-6-4 fertilizer for evergreen trees. Been looking around and 10-6-4 isn't available many places. What would be a good fertilizer to feed them in the spring, thanks.
 
windthrown

windthrown

361 Junkie
Joined
Sep 24, 2006
Messages
10,854
Location
The longbar PNW
I would just use something like 10-10-10. Its common and available in pellets and for dissolving in water. Avoid grass fertilizer with ammonia or urea. They are too high in nitrogen.

You can also use wood ash (high in K) and rock phosphate (high in P), and some high nitrogen fertilizer watered down to 1/3 strength (like pee at 12:1 water to pee).
 
diezelsmoke

diezelsmoke

ArboristSite Operative
Joined
Nov 2, 2012
Messages
148
Location
wi
I use this product, Jobes fertilizer spikes and they work well. They have a whole line of produces for different tree, evergreens, shade trees, fruit, etc.
 

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