Ask a Question forum: Hydrangeas

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Saginaw, Michigan
Jul 23, 2017 12:22 PM CST
We live in Michigan and had 7 hydrangea plants put in last August. We cut them back as directed. This year, the plants got leaves and looked real good. All of a sudden the leaves started to dry up and fall off until the plant is bare. No we have a few new leaves growing again. We have had a lot of rain all spring and summer, so they go enough water. My husband saw some mites on on plant and sprayed them all. They are not all together. We have 2 on the east side, 2 on the north side, and 3 on the south side. They all have the same problem. We took a small branch back to the nursery and they said it was mites. But we are not sure as no other plants have the problem. Some are planted by roses (east side), some are planted alone (south side) and some are planted by evergreen type plants and a small tree (north side). Could they have had something from the nursery when we got them or is it the mites?
Saginaw Michigan.
Sue Matzke
Name: Christine
Saugerties, NY zone 5a
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Jul 24, 2017 6:13 AM CST
A picture would be a huge help, when did you cut them back?? Hydrangea's shouldn't really be cut back. Other members will give you better advice Smiling

Name: Philip Becker
Fresno California (Zone 8a)
Jul 24, 2017 2:46 PM CST
Look up your variety to see how and when to prune.

You and nursury, said spider mites. Thats probably what is.
Mites, take several spraying to get rid of. Blasting with hose between spraying helps get rid of some, but, really gets rid of webs that are suffocating leaves.
Spray with 1 Tbl regular Dawn dish soap to 1 gallon water. Every 2 or 3 days. It may take a couple weeks, till there all gone. Be sure to spray undersides and uppersides of leaves.
Some bugs prefer certain plants over others. When there preferred plant is gone, they will go to other plants. So be on lookout for them on your other plants.
Anything i say, could be misrepresented, or wrong.

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