Q&A for How to Prune Hydrangeas

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  • Question
    Why are my hydrangeas not blooming?
    Maggie Moran
    Home & Garden Specialist
    Maggie Moran is a Professional Gardener in Pennsylvania.
    Home & Garden Specialist
    Expert Answer
    Sometimes, hydrangeas won't bloom because the old wood is dying back. It can also be caused by pruning at the wrong time and cutting off new growth.
  • Question
    Are you supposed to deadhead hydrangeas?
    Maggie Moran
    Home & Garden Specialist
    Maggie Moran is a Professional Gardener in Pennsylvania.
    Home & Garden Specialist
    Expert Answer
    Yes, you can deadhead hydrangeas. It mainly depends on what time of year it is.
  • Question
    Do I have to prune my hydrangeas?
    Maggie Moran
    Home & Garden Specialist
    Maggie Moran is a Professional Gardener in Pennsylvania.
    Home & Garden Specialist
    Expert Answer
    No, you don't have to prune them, unless you feel the shrub is too large and takes up too much space.
  • Question
    When should hydrangeas be pruned?
    Maggie Moran
    Home & Garden Specialist
    Maggie Moran is a Professional Gardener in Pennsylvania.
    Home & Garden Specialist
    Expert Answer
    As with most plants, pruning should be done when the plant is dormant. This is typically in late winter or early spring.
  • Question
    Do I need to remove the dead flowers from my standard hydrangeas in order for them to bloom in the spring?
    Maggie Moran
    Home & Garden Specialist
    Maggie Moran is a Professional Gardener in Pennsylvania.
    Home & Garden Specialist
    Expert Answer
    It is recommended to deadhead, or remove the spent blossoms on your hydrangea in summer. This will encourage growth for the next year.
  • Question
    What are the brown spots on the leaves? They appear on our plants all summer.
    Maggie Moran
    Home & Garden Specialist
    Maggie Moran is a Professional Gardener in Pennsylvania.
    Home & Garden Specialist
    Expert Answer
    These spots are generally caused by fungal spores. Usually, the spots appear on the leaf and the leaf turns yellow and falls off, allowing the rest of the plant to survive.
  • Question
    Are hydrangea leaves supposed to go brown in the fall?
    Community Answer
    Dry, brown leaves appear naturally in fall as hydrangeas prepare for winter dormancy.
  • Question
    What do I do if there is not much regrowth after I cut my hydrangea back too much?
    Community Answer
    Try leaving it alone. Hydrangeas don't ever need to be trimmed. They will naturally grow into a large, circular plant with little intervention.
  • Question
    What would cause hydrangeas not to bloom very well?
    Community Answer
    Bugs and climate change. Prune the dying ones and take them inside on a windowsill so they can still get sun. When the climate and bugs get better, take the plants out again.
  • Question
    If the flower has turned brown, should I cut it off or leave it?
    Community Answer
    Leave it till spring. I don't prune my plants at all, but we have a harsh winter so they stay small.
  • Question
    How can I keep blue hydrangeas blue?
    Community Answer
    I put pennies in the soil when I planted my shrub, and it is blue with some purple heads of flowers.
  • Question
    Do I need to remove the dead flowers from my standard hydrangeas in order for them to bloom in the spring?
    Community Answer
    Yes, you should remove the dead flowers.
  • Question
    My hydrangeas are probably 20 years old, and they are huge. How can I tell what kind they are so I will know when to prune them?
    Community Answer
    Ask a specialist to come and see, or take a few pictures of them and bring the pictures to a garden center.
  • Question
    Can I change my pink hydrangea to blue?
    Community Answer
    No, you won't be able to turn a pink hydrangea into a blue hydrangea.
  • Question
    My endless summer has what looks like wild shoots growing with the branches that have blossoms. Is it a wild shoot or just new growth?
    Community Answer
    It depends. If it usually grows like that, it isn't a wild shoot.
  • Question
    I live in New South Wales, Australia - when do you suggest I prune?
    Community Answer
    You should prune your hydrangeas after the flowers start to fade in late summer.
  • Question
    How should I prune hydrangeas that have become limp?
    Community Answer
    The hydrangeas are most likely limp because they did not get enough water. Wait until they begin to straighten out and then only prune the top.
  • Question
    My Merritt's supreme hydrangea has 6 buds on each stem, but they're very slow to bloom. Why?
    Community Answer
    You may not have enough nutrients in your soil, or you are not watering them enough.
  • Question
    When I brought my blue hydrangea home, it had several flowers on it, but now it has stopped blooming. What could I have done wrong?
    Community Answer
    It doesn't like where it is, most likely. Hydrangeas do not like steady full sun, either morning or mid afternoon sun. Also, they like acidic soil. Mine, planted under and around pine trees are thriving.
  • Question
    Can hydrangea plants be divided?
    Community Answer
    Yes, they can. I recommend doing so in the early springtime.
  • Question
    My vanilla strawberry hydrangea has become so tall that the branches are falling down from the weight. How can I prevent that from happening next year?
    Community Answer
    I trim mine back in the fall. Cut off the dead flowers and a few inches of the stems. I tend to keep it at about 3.5 feet tall. It grows new leaves and buds in the spring.
  • Question
    It said to leave the dead blooms to protect next year's growth. Is this true?
    Savannah Vold
    Community Answer
    Yes. Leaving the dead blooms (dried, brown flowers) till the summertime encourages new growth. Once the summer hits, prune the dead blooms from your hydrangea bush by cutting off the dried bloom directly under the head at the top of the stem.
  • Question
    Can I cut my hydrangea back when it stop blooming and the leaves turn brown?
    Savannah Vold
    Community Answer
    Yes, but it's best to prune the dead and dying blooms and canes in mid-summer when there's a lesser likelihood of accidentally cutting off any new growth.
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