I put this on my land tour page but that probably doesn’t get much traffic so figured I’d ask here.
I have a bunch of apple trees coming Thursday and my ground is heavy clay, should I do anything to amend the soil or just loosen up the native soil as best as I can?
Good bad indifferent. This is what I did with my heavy clay soil. I rototilled as big as my weedmat will be, then I dug down about 2ft in the middle. I mixed it with a bit of lime and fertilizer, about a half coffee cup of each. The soil immediately touching the roots, I did not add fetilizer. I packed down the lower 1st foot 2ft deep hole. Put the tree in, put the fertilized soil around the sides. Left about a 1/2 of a 5 gallon buckets of soil w/o fertilizer. right on the roots. This stuff got well chopped up so, there little to no air pockets. I push the soil around all the roots, but not too agressively as to damage smaller roots. Dig extra if needed so no root is coil back in, you want them spread out. Water as you go. Then water them the next day or so.
If you feel the need a bit of finer stuff could be added. Keep in mind 2 problems. The loose soil in heavy soil ends up being a water bucket to drown the roots in. Easier to dig and more fragrant soil attracts voles.
Many folks have donw well with the common B118, M111, antonovka, and dolgo rootstocks in heavier soil.
Some folks or tree nursries say fertilize is good, some say not to in the soil when you dig. Potassium and phosphorus has trouble going down in the soil. Nitrogen can burn the tender roots. So, I use 6-24-24. In addition to the 6-24-24, I put in a few agriform fertilzer tablets a few inches away from the root edge. 3 or 4 21gr ones.
I transplanted plum trees from pots in loose nice potting soil. Voles wrecked most of my plums. I ammended the soil maybe 1-2% peat moss and about 5% potting soil with the rototiller with some antonovka bareroots and mulched them, they all survived just fine. Reading peoples experiences on this site, I didn't peat moss or added potting soil to the last tree round. I also used crushed stone instead of wood mulch. I feel I went a bit overkill, but if my success rate is high, so be it. Used 3ft tall aluminum window screen as a vole guard around the trunk, then 2x4 mesh to keep the rabbits n deer out. I initally used 4' tall 10ft of material. I know these trees will survive, but some branches will get bothered some. I have 6ft tall stuff to put in instead. Folks on here say 5' tall and 10ft of fencing works good. Whitetail crabs told me if using 4' then apply 15ft of it.
I hae not staked any trees yet, but will do so this summer. Get the tree upright, also the less the tree moves in the wind, the better it is for the root system. I have had plants barely grow because it kept breking roots from swaying in the breeze. Then I staked them, and they start growing alot better. Mostly with dwarf potted citrus tree collection and cacti I put outside in the summer here in NY. Not a big deal breaker if you cant when you plant, and quite a few folks have nice mature trees that weren't staked either.
I pruned my trees when they came. Growth in the right place is better than untamed messy trees. Improper branch location or bad crotch angles will be broken limbs of less than ideal fruit. Double leaders, or branches than start turning up towards the sky, get rid of them. You can always leave a branch for a year then prune it off, if you don't have alot of material to work with, or had to remove a major chunk of the tree to get it growing to a proper central leader.