How To Fertilize Your Hydrangeas Right Now

Hydrangeas are garden favorites thanks to their big, showy flowers. But if yours aren’t blooming as much as you’d like, the right fertilization routine can make a big difference. Here’s how to feed your hydrangeas for lush growth and impressive blooms.

Know Your Type

Before you fertilize, identify what kind of hydrangea you have. Bigleaf (macrophylla), panicle (paniculata), smooth (arborescens), and oakleaf (quercifolia) hydrangeas each have slightly different needs. Bigleaf types are the most sensitive to soil nutrients, especially when it comes to flower color.

When to Fertilize

The best time to fertilize is in spring, just as new growth begins. For most hydrangeas, a second light feeding in early summer can encourage more blooms. Avoid fertilizing after August. Late-season feeding can promote tender growth that may not harden off before winter.

Choosing the Right Fertilizer

A balanced, slow-release fertilizer like 10-10-10 or 14-14-14 works well for general health. For more blooms, try one slightly higher in phosphorus (the middle number). Avoid high-nitrogen formulas, which can push leaf growth at the expense of flowers.

You can get dedicated hydrangea feeds like this one. But any flower food will work well, especially if it has a high phosphorus content, because of this tomato feeds also work very well.

Many people also swear by homemade banana fertilizer, made by adding banana peels to water and letting them sit for a few weeks. This is perfect for hydrangeas and I have used it to great success.

I show you how you can make your own banana peel fertilizer here.

How to Apply

Apply granular fertilizer around the base of the plant, not directly on the stems. Water it in well to help nutrients soak into the soil. Follow package directions to avoid overfeeding, which can stress the plant.

Liquid feeds are usually added into your watering can and then watered around the base of the plant. Again, ensure you check the instructions to ensure you dilute to the correct amount.

Compost or organic mulch can also improve soil health and feed slowly over time.

Other Bloom-Boosting Tips

Proper pruning and good light are just as important as feeding. Bigleaf and oakleaf types bloom on old wood, so avoid cutting them back hard in fall or spring. Panicle and smooth hydrangeas bloom on new wood and can be cut back in late winter. Make sure your plants get morning sun and some afternoon shade for best results.