If you have many trees to mulch and a big garden you.

May 20, The depth of mulch generally ranges from less than 1 inch to 4 inches deep, depending on the type of mulching material used, according to the Missouri Botanical Garden.

The general recommendation. Always mulch ” deep, never greater than 4” deep. Mulch that is too deep can inhibit the oxygen exchange that needs to happen between roots and the atmosphere. In other words, roots breathe oxygen just like we do! Most of the roots of a tree are located in the top inches of the soil, so make sure you’re not covering them up with too thick of a layer of mulch. Size.

Mulching is not developing a volcanic cone of wood mulch a foot or more high right up against the trunk.

The wider the mulch ring the. Apr 29, On the ground, circling out from your tree’s trunk, you’ll want a 2 inch layer of medium texture mulch. This size of mulch is perfect new tree mulch thickness allowing water to drain into the soil while safeguarding against excessive evaporation. Finally, finish off with a 1 inch layer of coarse treeclear.barted Reading Time: 4 mins. Once you have finished planting, you should place one to three inches of good quality mulch on top of the planting area and the top root ball of your tree.

When applying, make certain it is not placed against the trunk. The mulched area should resemble a doughnut around the plant.

Tree mulching is not heaping piles of mulch up and around the trunk.

Place mulch out from the root flare to the drip line, and even further if you are designing a landscape bed or you want to establish a mowing boundary around the tree.

(We advise this!) Out at this distance from the trunk, three or four inches is enough.