Oakleaf Hydrangea

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  1. How Do You Get a Hydrangea to Bloom Every Year?
  2. How Do I Prune the Oakleaf Hydrangea?
  3. How to Root Oak Leaf Hydrangea Cutting
  4. Soil Type
  5. Oakleaf Hydrangea
  6. Perennial Garden Leaf Issues
  7. Making Bushes Bloom
Asked by gardenguy on February 20, 2011
How Do You Get a Hydrangea to Bloom Every Year?

I have five hydrangeas in my yard. One I recently purchased, Oak leaf. Another I dug up from a house that was about to be bulldozed down and two smaller ones that I have had for many years. The rescued hydrangea is big and blooms without any help from me. The oak leaf, even though it is still small, blooms very well. But the other three have maybe one bloom, if any. They are on the northeast and northwest corners of my home. What am I doing wrong?

ANSWERS
Nikki
Certified GKH Gardening Expert
Asked by char on April 10, 2011
How Do I Prune the Oakleaf Hydrangea?

How do I prune the Oakleaf Hydrangea?

ANSWERS
Nikki
Certified GKH Gardening Expert
Asked by Anonymous on April 25, 2011
How to Root Oak Leaf Hydrangea Cutting

Last year I ‘tried’ to root an Oak Leaf hydrangea cutting. It just didn’t happen, even with rooting hormone. I now have another cutting. Since the ‘stem’ is rather woody on the Oak Leaf, can you tell me the best/easiest way to root these?

ANSWERS
Nikki
Certified GKH Gardening Expert

I would try again with traditional rooting methods. Even the best professional gardeners do not have a 100% success rate. Keeping humidity up around the cutting it key to success though.

Honey is not a rooting hormone like willow water, but it can help in rooting cuttings. It is anti-bacterial and helps to keep disease away from the open wound on the cutting, which means that the cutting will have a better chance at rooting.

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Asked by Anonymous on May 6, 2011
Soil Type

What type of soil is under an evergreen tree? I planted an oak hydrangea around the tree and it is dying. There are a lot of needles on the soil from the tree.  Should I move the plant?

ANSWERS
Nikki
Certified GKH Gardening Expert

The soil under pines tends to be high in acid. But more likely, the tree is using up all the water in the area and this is what is killing the plant. This is common. It would be probably best to move it.

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Asked by Anonymous on May 29, 2011
Oakleaf Hydrangea

My hydrangea has black spots all over the leaves. What is this, or is it normal?

ANSWERS
Nikki
Certified GKH Gardening Expert

It has fungal leaf spot. Control options include cleaning up and disposing of any fallen leaves or removing those still on hte shrub to prevent spreading. Avoid overhead irrigation, which wets the leaves, and use drip irrigation, soaker hoses or a watering wand instead. It is helpful if your oakleaf hydrangea is planted in an area where there is good air circulation. Make sure it is not crowded by other plants. This permits the leaves to dry quickly after rain, which helps prevent leaf spot diseases. You can also apply a fungicide.

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Asked by Anonymous on July 4, 2011
Perennial Garden Leaf Issues

I have several plants – Oakleaf hydrangea, black-eyed Susans, and coneflower – where the leaves have holes in them and may also have rust disease. The plants are growing, but they do not look very healthy. I am unable to find any information on treatment. I have tried water and soap, but it does not appear to help. I have not tried soap, oil and water, which was my next option. Removing the damaged leaves would leave the plant almost bare.

ANSWERS
Nikki
Certified GKH Gardening Expert
Asked by Anonymous on July 14, 2011
Making Bushes Bloom

I’ve got an oakleaf hydrangea and a smoke bush which both grow huge and healthy looking each summer, but neither has flowered for over 10 years (they were planted 11 years ago). I prune them back in late fall. What can I do to get them to bloom?

ANSWERS
Nikki
Certified GKH Gardening Expert

I would suspect that they have too little phosphorus, especially if they are planted near a lawn area that gets regularly fertilized. This article will explain more: https://www.gardeningknowhow.com/garden-how-to/soil-fertilizers/phosphorus-plant-growth.htm

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