How to Trim Peony Bushes

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Peonies are perennial bushes that lose most of their leaves during the winter and then bounce back for a beautiful bloom in the spring. These bushes produce large, brightly-colored flowers in red, white, yellow, or pink to brighten up your lawn and make your garden feel like springtime. You can keep your peony bush healthy by pruning it once in the fall and doing minor maintenance pruning during the growing season.

Method 1
Method 1 of 2:

Winterizing Peonies in the Fall

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  1. Most peony varieties bloom in the spring and die back in the winter. Wait until the leaves of the plant start to turn brown or yellow to start pruning. In most climates, this happens around late September or early October. [1]
    • The cuts you make in the fall will affect where new growth appears in the spring.
    • If you live in a super cold climate, your plant may start to brown as early as mid-September.
  2. Pick up a pair of sharp pruning shears and hold them at a 45-degree angle. Keep them at this angle whenever you make your cuts so that the branches of the peony bush end in an angled point. [2]
    • Cutting at an angle will prevent water from pooling on the cut ends of the stem, which could lead to disease or rot.
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  3. The buds, or the small bumps on each stem, are what produce flowers. As you make your cuts, try to leave the buds intact so that they can bloom into flowers in the spring. [3]
    • Leaving the buds intact will help your peony bush produce more flowers in the spring.
  4. If you want your peony bush to focus on making large flowers at the end of each branch, use your pruners to remove the smaller buds on the sides of the branches. Remember to hold your pruners at a 45-degree angle as you cut. [4]
    • If you want more small flowers, cut off the large bud at the end of the branch and leave the smaller buds intact.
  5. Although it is not common, peonies sometimes get pests like eelworms or caterpillars in and on top of their branches. If you see any branches that are covered in small insects, use your pruners to clip them back. [5]
    • If your peony bush has ants on it, you don’t need to worry. Ants are harmless to a peony bush.
  6. Take your pruners and hold them just below the diseased part of the branch. Cut it off at an angle so you remove the diseased part of the stem. If the base of the branch is not discolored, don’t cut it off. [6]
    • Clean your pruners with rubbing alcohol after each cut you make on a diseased branch. This will prevent the spread of the disease as you cut the rest of the peony bush.
    • Throw diseased and insect infested branches into the garbage, not your compost pile. That way, they won’t be able to infect any other foliage you have.
  7. Take a look around your peony bush and notice if there are any branches that cross or intersect. If there are, cut back the smaller branch to free them up and stop them from rubbing together. [7]
    • Branches rubbing together can rub a hole in the stems of your peony, which can leave it vulnerable to insects and disease.
  8. Even if the leaves of your peony bush are starting to turn yellow or brown, it’s important to leave them be so they can conserve energy for the spring. Don’t cut off any leaves and try to avoid ripping or tearing them accidentally as you prune. [8]

    Variation: Herbaceous peonies will lose their foliage on their own during the fall. If your peony is herbaceous, don’t be alarmed if all of the leaves fall off in late September or early October.

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Method 2
Method 2 of 2:

Maintaining Blooms in the Spring and Summer

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  1. As the temperatures start to rise in your area, keep an eye on the branches of your peonies to see if they become discolored or warped. You can also look at how many flowers they are producing and cut them back if you need to. [9]
    • In most areas, peonies start blooming around late March or early April.
  2. Branches that are yellow or brown are probably dead or dying, so they won’t produce flowers anymore. Look in the center of your peony bush to spot branches like these so they don’t infect the entire bush. [10]
    • If you do find diseased branches, use your pruners to cut them off at the base of the branch.

    Did You Know? Peonies can sometimes develop mold, which looks black or brown, or fungus, which looks white. [11]

  3. Getting rid of the dead flowers, or deadheading, won’t actually divert energy into new growth on a peony. However, if there are a lot of dead flowers on your bush and you’d like to get rid of them, make a small cut with your pruners just below the base of the flower to get rid of them. [12]
    • Getting rid of discolored flowers can protect your plant from rotting as the flowers die and fall off.
  4. After you’re done pruning, take a rake and use it to clean up the area beneath the peony bush. Make sure to discard of any foliage that fell off so it doesn’t rot as the ground gets wet. [13]
    • As long as the foliage isn’t diseased or insect infested, you can put it in your compost pile or yard debris bin.
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      Things You’ll Need

      Winterizing Peonies in the Fall

      • Pruners

      Maintaining Blooms in the Spring and Summer

      • Pruners
      • Rubbing alcohol
      • Rake

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      References

      1. ↑ https://www.missouribotanicalgarden.org/PlantFinder/PlantFinderDetails.aspx?kempercode=q400
      2. ↑ https://www.missouribotanicalgarden.org/PlantFinder/PlantFinderDetails.aspx?kempercode=q400
      3. ↑ https://gardentabs.com/cut-back-peonies/
      4. ↑ https://www.rhs.org.uk/Plants/182524/Paeonia-lactiflora-Gardenia/Details
      5. ↑ https://www.missouribotanicalgarden.org/PlantFinder/PlantFinderDetails.aspx?kempercode=q400
      6. ↑ https://ucanr.edu/sites/gardenweb/files/28952.pdf
      7. ↑ https://www.rhs.org.uk/Plants/182524/Paeonia-lactiflora-Gardenia/Details
      8. ↑ https://www.rhs.org.uk/Plants/182524/Paeonia-lactiflora-Gardenia/Details
      9. ↑ https://gardentabs.com/cut-back-peonies/
      1. ↑ https://www.rhs.org.uk/Plants/182524/Paeonia-lactiflora-Gardenia/Details
      2. ↑ https://apps.extension.umn.edu/garden/diagnose/plant/annualperennial/peony/flowersbrown.html
      3. ↑ https://www.missouribotanicalgarden.org/PlantFinder/PlantFinderDetails.aspx?kempercode=q400
      4. ↑ https://www.rhs.org.uk/Plants/182524/Paeonia-lactiflora-Gardenia/Details

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