The first part of the fertilizer should be applied in early spring, before the buds appear, but after spring pruning.
During this period, nitrogen agents should be added so that the tree has strength and a lush green mass appears. Ammonium nitrate or urea will do.
Then, before flowering, potassium and phosphorus should be added.
It is advisable to apply them in the fall, but in extreme cases, if time has been lost, you can return to the procedure in the spring, but first all the products must be diluted in water.
These elements will help you get sweet and large berries.
You can pay attention to organic fertilizers, for example, infusion of chicken manure or mullein, they also contain elements that are necessary for cherries.
In addition, as gardeners note, you can give calcium fertilizer.
This is relevant if the soil is acidic and there is a calcium deficiency.
