The first and most important food to give your weeping cherry begins upon its planting. Choose a sunny, elevated location that offers good drainage and air circulation. Test the soil to assure a pH acid level of 6.1 to 6.5. Add peat moss to your planting hole, supplemented with an organic mix of beneficial mycorrhizae to encourage root production and expansion.
Even before you plant, you should test the hole to assure proper drainage. When first planted, water your weeping cherry twice a week with a slow trickle from your hose. Soak fully. Once established, nature should supply sufficient water unless your area experiences drought.
Allow your tree to establish healthy roots and new growth before supplementing with any fertilizer.
Fertilize in early spring after the last frost using a slow-release granular fertilizer of nitrogen-phosphorus-potassium, 10-6-4. You can also apply liquid fertilizer by soil injector.
Although not necessary for its nourishment, a regular wash from a high-pressure spray will help keep aphids and spider mites from nesting on your tree.