When the soil is protected by mulch, such as dried leaves, shredded wood or wood chips, roots grow more and plants are more vigorous. By blocking sunlight, mulch keeps weed seeds from sprouting. And over time, organisms in the soil will help nutrients to be released to the roots as they break the mulch down. That is ESPECIALLY why we recommend that you mulch with a great organic like Black Forest from Kellogg's Garden Products.
That's why mulching is not a one-time thing. The mulch in contact with the soil will steadily decay and the layer will get thinner over time. It needs to be replenished regularly to maintain the benefits for your garden.
Here are some tips for keeping up your mulch layer for healthier plants;
Spread it on top. There's no need to remove the old mulch. You can add more right over it.
Like with like. The garden will look best if the new mulch matches the old. A tree doesn't care — but sometimes a gardener does. If you can't find the same color of wood chips you used before, or if the old mulch has faded or you've run out of shredded leaves, simply rake out the new mulch to hide the old. One more reason to use Black Forest. It is always available here at the nursery, and looks so nice.
Not too deep. Spread mulch in an even layer about 3 to 4 inches deep around trees and shrubs. Don't pile it against the bark of a tree trunk or the bark of shrubs' stems. If there's still mulch left on the ground, add only as much as needed to reach that 3 to 4 inch depth. In perennial, annual and vegetable beds, 1 or 2 inches of mulch is plenty.
Water first. Mulch will hold moisture in the soil so you need to water less often in hot, dry weather — but that only works if there's moisture in the soil to begin with.