when to fertilize hydrangeas

Hydrangeas are a beautiful addition to any garden, with their big, fluffy blooms in shades of pink, blue, and white. But to get the most out of your hydrangeas, it’s important to fertilize them at the right time. In this article, we’ll cover everything you need to know about when to fertilize hydrangeas.

Understanding Hydrangeas

Hydrangea Plant

Before we dive into the specifics of fertilizing, it’s important to understand a little bit about hydrangeas. There are several types of hydrangeas, but the most common are bigleaf (Hydrangea macrophylla), panicle (Hydrangea paniculata), and smooth (Hydrangea arborescens).

Hydrangeas prefer partial shade and moist, well-drained soil. They also require regular pruning to keep them healthy and promote good blooming.

When to Fertilize Hydrangeas

Fertilizer For Plants

The best time to fertilize hydrangeas depends on the type of fertilizer you’re using. For most hydrangeas, it’s best to fertilize in early spring, just as new growth is starting. This will give the plant the nutrients it needs to produce healthy leaves and blooms.

If you’re using a slow-release fertilizer, you can also fertilize in late spring or early summer. This will give your hydrangeas a boost of energy as they start to bloom.

It’s important not to fertilize hydrangeas in late summer or fall. This can encourage new growth that may not have time to harden off before winter, leaving the plant vulnerable to damage.

Choosing the Right Fertilizer

Organic Fertilizer

When it comes to choosing a fertilizer for your hydrangeas, there are a few things to keep in mind. First, look for a fertilizer with a balanced ratio of nitrogen, phosphorus, and potassium (NPK).

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Second, consider using an organic fertilizer. Organic fertilizers are made from natural materials and help improve soil health over time. They’re also less likely to burn your plants than synthetic fertilizers.

Finally, avoid using a high-nitrogen fertilizer on your hydrangeas. Too much nitrogen can encourage leafy growth at the expense of blooms.

Applying Fertilizer

Fertilizer Application

When applying fertilizer to your hydrangeas, it’s important to follow the instructions on the package. For most fertilizers, you’ll want to sprinkle the granules around the base of the plant and then water thoroughly.

Be careful not to over-fertilize your hydrangeas. Too much fertilizer can burn the roots and damage the plant. If you notice yellowing or browning leaves, it may be a sign that you’re using too much fertilizer.

Other Tips for Healthy Hydrangeas

Hydrangea Care

While fertilizing is important for healthy hydrangeas, there are a few other things you can do to keep your plants looking their best:

  • Prune your hydrangeas after they bloom to promote new growth and keep the plant tidy.
  • Water your hydrangeas regularly, especially during hot, dry weather.
  • Provide partial shade to protect your hydrangeas from the hot afternoon sun.
  • Avoid overhead watering, which can lead to fungal growth and disease.


In summary, fertilizing your hydrangeas at the right time is essential for promoting healthy growth and beautiful blooms. Follow the tips outlined in this article, and your hydrangeas are sure to thrive!

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