3. Fertilizing at the Wrong Time
Timing is everything when it comes to fertilizing hydrangeas. Applying fertilizer too early or too late in the season can disrupt the plant’s natural growth cycle. The best time to fertilize hydrangeas is in early spring, just as the plants begin to leaf out, and again in mid-summer if needed. Avoid fertilizing in late fall, as this can encourage new growth that may not survive the winter.
4. Ignoring Soil pH Levels
Soil pH plays a significant role in the availability of nutrients to hydrangeas. These plants are unique in that their bloom color can change based on soil pH. Acidic soils (pH below 6) produce blue flowers, while alkaline soils (pH above 7) result in pink blooms. Ignoring soil pH can lead to nutrient deficiencies and affect bloom color. Regularly testing your soil and adjusting pH as needed is essential for healthy hydrangeas.
5. Not Considering the Hydrangea Variety
Different hydrangea varieties have different fertilization needs. For example, bigleaf hydrangeas (Hydrangea macrophylla) are more sensitive to soil pH changes than panicle hydrangeas (Hydrangea paniculata). Understanding the specific needs of your hydrangea variety will help you tailor your fertilization approach for the best results.
The Right Way to Fertilize Your Hydrangeas
To fertilize your hydrangeas correctly, start by selecting a balanced, slow-release fertilizer with an N-P-K ratio of around 10-10-10. Apply the fertilizer in early spring, following the package instructions for the appropriate amount based on your plant’s size. Water the fertilizer in thoroughly to help it reach the roots. Consider a second application in mid-summer if your plants show signs of nutrient deficiency.
Creating a Balanced Fertilization Schedule
A balanced fertilization schedule involves regular applications of the right type of fertilizer at the right times. Begin in early spring with a slow-release granular fertilizer, and supplement with a liquid fertilizer every 4-6 weeks during the growing season if necessary. Always monitor your plants for signs of over-fertilization, such as burnt leaf edges or excessive leaf growth.
Recipe for Homemade Liquid Fertilizer
For those who prefer a DIY approach, you can create a homemade liquid fertilizer using household ingredients. Combine 1 tablespoon of Epsom salt, 1 tablespoon of baking soda, and 1 tablespoon of ammonia in a gallon of water. This mixture provides essential nutrients and can be used as a foliar spray or soil drench every 4-6 weeks.
ADVERTISEMENT
