Routine fertilization supports new growth and helps shrubs thrive. Willows are not heavy feeders, but they benefit from light feedings. Willows living in soil with low organic content benefit the most from fertilization. These shrubs and trees are vigorous growers and develop a deep root system to access sufficient nutrients and moisture. Once established, willows will only need an annual feeding to maintain vigor and produce abundant flowers and foliage.
How to Fertilize Willow
Willow shrubs grow best in rich soil with a neutral to alkaline pH. Avoid acid fertilizers and test the soil to determine if the pH should be addressed. Fertilize Willow shrubs using a water-soluble product that can be applied during a watering session or a granular product sprinkled on the ground above the root ball. Alternately, spread a thick layer of organic mulch around the base of the plant to provide a boost of nutrition.
Best Time To Fertilize Willow
Fertilize Willow shrubs in the spring before new growth appears. Wait until the temperatures are warm to fertilize. One fertilizer application in the spring is enough to sustain the plant throughout the growing season.
Best Fertilizer For Willow
Use a slow-release fertilizer with increased nitrogen levels for Willows. Nitrogen is the first number in the ratio, so a product like 20-10-10, with the first number higher than the other numbers is ideal. Increased nitrogen promotes foliage growth. Use a granular or water-soluble product, depending on your preference. Follow the dosing instructions on the packaging.
Willow Fertilizing Tips
- Apply fertilizer in early spring before new growth appears
- Use a slow-release fertilizer with increased nitrogen
- Topdress the soil with organic mulch