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    Home » Gardening

    Dividing Perennial Plants

    February 2, 2016 by Patti Estep 2 Comments

    Hosta coming up in the spring ground.

    Do you grow perennial plants? If so, do you divide and transplant them on a regular basis? Dividing perennials is an easy and worthwhile task. Learn when and how and why you should divide perennials in your garden.

    Spring garden with blooming perennial geranium and wood anemone.

    Why You Should Divide Perennials

    Maybe some of your perennials are growing out of control. Or maybe, you wish you had more of the same plant in another part of your yard. Maybe you want to share some with a friend.

    These are all good reasons, however, the most important reason is that many plants have crowded roots after a few years and will not grow as well. Maybe you've noticed some plants starting to bald in the center and some are hardly blooming. Those are key signs that the plant needs to be divided.  

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    New growth in the spring.

    Sometimes grass creeps into my garden, so dividing really helps me get rid of it. Otherwise, it's pretty hard to pull out individual wayward grasses.

    When Should You Divide Perennials?

    I like to do this in the spring, which is when I am itching to get out and have lots of energy for garden work. Since the foliage is just starting to grow, it is easy to see what you are doing, and the ground is easy to work. Also, spring dividing gives the plants plenty of time to recuperate from the move.

    Note: (see the chart below) Some plants are best divided in the summer or fall, after flowering, and some do not like to be divided at all and are best left alone.

    Crowded hosta leaves in a lime color

    Try to work on a day that is cloudy, and one that is not too hot. If rain is in the forecast for the next day or so, you will be ahead of the game.

    Hosta leaves just emerging from the ground in the spring.

    Once three or four inches of growth appear, dig all around the plant a couple of inches away from the leaves, using a spade or a pitchfork. Then, try and lift as much of the root ball as you can.  Next, shake off the soil or gently hose it off, to see where you can easily separate the clump into two or three pieces by gently pulling or using a sharp knife.

    Peony shrub division showing one pink eye.

    Replant the divisions at the same depth they were growing in before, and try to add some compost to the new hole along with the garden soil. Give it a thorough drink of water mixed with a little fertilizer, and you are all set. Keep an eye on the plants, making sure that they do not dry out while they re-establish themselves.

    Division of penstemon in a nursery pot with a brown paper bag and bow.

    If you find yourself with a lot of extras, give them away to family, friends, and neighbors. Better yet, host a garden party and give them as favors, or plan a plant swap. It's so much fun to see what everyone else is growing, and chances are, if it grew well in your friend's yard, it will probably grow well in your yard too.

    Basics on Dividing Perennials

    Divide Perennials in the Spring

    Easy (just dig up and pull apart)

    • Black-eye Susan (Rudbeckia)
    • Coneflowers (Echinacea)
    • Hardy Geranium
    • Tickseed (Coreopsis)
    • Beebalm

    Harder - Use a sharp knife to cut through the plant material

    • Ferns
    • Hosta
    • Daylily
    • Ornamental Grass

    Dividing Perennials in the Fall or late Summer

    • Iris
    • Dahlia
    • Allium
    • Peony

    Perennials that Don't Like Dividing

    • Lavender (propagate by cuttings or layering)
    • Oriental Poppies (gather seeds)
    • Columbine (gather seeds)
    • Russian Sage (propagate by cuttings or layering)

    Here's a fun graphic about dividing perennials.

    Dividing Perennials Cheat Sheet

    Are There Any Perennials that Don't Need Dividing?

    Yes, there are some plants that you may want to divide for other parts of the garden or to give to friends but they will be just fine if you don't.

    • Hosta
    • Bleeding Heart
    • Peony
    • Lily of the Valley
    • Sedum

    Whether you want more plants for yourself or to gift. Or if you just want to keep your existing perennials happy and healthy consider dividing them this season.

    Patti signature

    More Perennial Plant Gardening Tips

    • 10 Cut Flower Perennials That Are Easy To Grow
    • Perennials for Containers
    • Pruning Perennials - Spring or Fall
     
    « DIY Essential Oil Diffuser For All Your Favorite Scents
    Primrose Passion - Beautiful Spring Blooms You'll Want in Your Garden »

    About Patti Estep

    Patti is the creator of Hearth and Vine, a home and garden blog filled with projects to inspire your creative side. She loves crafting, gardening, decorating and entertaining at her home in Pennsylvania. When she is not working on a project at home or searching for treasures at nurseries and thrift stores with her girlfriends, you’ll probably find her with family and friends, at a restaurant, or home party enjoying new and different food adventures.

    Reader Interactions

    Comments

    1. Susan

      May 11, 2014 at 8:09 am

      Loved this post! Gave me a few tips I'll be using today but wasn't overwhelming!

      Reply
      • [email protected]

        May 11, 2014 at 8:12 am

        Thanks. I'm so glad you feel that way. It's my goal to make it easy got everyone. Enjoy your day. I'm getting ready to head outside myself.
        Patti

        Reply

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