How To Fertilize Your Utah Plants, Shrubs and Trees
Depending on preference, you have an array of options on types of fertilizers and range of fertilizers. Arbor Day sells a 16-16-16 pellet option that we recommend using all year here in Utah. Usually the amount needed for each tree, shrub, perennial, annual, grass or vegetable is by size of the plant. The larger tree is going to need a couple of cups, whereas the small annual will need a sprinkle of pellets in its general area. Pellets are not the only option and liquid form can be used. Avoid using chemical fertilizer on the leaves and fruit of plants you intend to eat. We recommend you use organic fertilizer on edibles when possible.
The frequency of application is also based on preference, but the recommended number is four times per year. Gypsum, not technically a fertilizer, can be applied earlier in the spring and later in the fall than fertilizer. Minerals help enhance the fertilizer and give the plant an even longer boost, especially in the heavy nutrient deficient clay soils in Utah.
The pellets should be placed where the water will seep it into the ground for the roots to absorb and should, therefore, be distributed in a fashion that will most easily allow for that to happen. Depending on your landscape style, add the pellets to where the water will help the ground absorb the pellets. Water with a hose so the pellets can start to dissolve.