Fertilizer/Fertilizing Leyland Cypress
david watterson wrote at 2008-03-14 16:07:04
Watterson tree farm has been growing and planting Leylands in NC for years. I have used Hollytone, but my favorite is from Lesco, 14-14-14 slow release, use 1 lb per inch of trunk diameter, sprinkled around the "drip-line" of the tree. I apply that much around April 1 and also Sept 1, Leylands grow best in Spring and Fall. The slow release is the most import and part of these instructions!
Block out your neighbors wrote at 2015-04-26 01:18:26
I planted 21 Leylands in sizes ranging from 3' to 6' tall. I also planted 3-3' and 13 6' tall Green Giants. I'm in zone 8 and have clay soil after about the first 4" of ground.
Being the red clay soil is impervious for excellent drainage, I dug the holes twice as wide, broke up the sides and bottom. I left at least 1-2" of the root ball above the existing grade because of this poorly draining soil. Next, right in the center of the hole, I used a post hole digger and went down 2-3' below the hole bottom and re filled that hole with medium sized river pebbles up to the floor level of the hole where the bottom of the tree ball will rest. This will act as a sump incase the heavy rain soaking in wants to cause "wet feet" syndrome to the root balls. Keep the water way down and away from the root ball as a safety precaution.
Now to the fertilizer part you asked about. I use Milorganite and poured it directly into the bottom where the root ball will rest and mixed it in with the chopped up bottom dirt as well as mixing it in with the natural dirt I removed when digging and using it to backfill the root ball. I watered in the backfill dirt when I was half way through backfilling and then added the remaining milorganite dirt around the root ball. I also agitate the dirt out from the dripline with a garden weasel tool and work more Milorganite into the dirt approx. 2" deep as this ground is hard, even the top layer of topsoil.
I added 2-3" of pine bark mulch to the root ball and out past the drip line of the branches. Make sure you do not heap up the mulch against or around the tree trunk.
They all seem to be doing excellent and the organic Milorganite is time release so, those babies should have some great dirt available and worms love ground that has it mixed in it. The mulch aids in moisture retention during the hot humid summers we have here.
I hope this helps out and worked best for me in heavy clay soil.