With every emerging month in the garden comes certain tasks and responsibilities you must take care of.
October is one such month when pruning proves to be important and beneficial to promote strong growth next spring.
In today’s article, we’ll take a look at all the perennials you should be pruning in October to achieve a stronger spring garden in the near future. Let’s dive straight into it!
Why Prune Perennials In October?
Pruning certain perennials in October can be beneficial for many reasons.
All in all, improved productivity, tidiness, disease prevention, and stronger regrowth are the main reasons you should consider pruning your perennials this month.
Because most perennials will have grown quite a lot by the time October comes around, removing spent stems and foliage not only redirects energy toward stronger growth but also keeps fungal problems like mildew or botrytis from overwintering in the garden.
In most cases, pruning also tidies the crown and encourages fresh shoots once the soil warms.
If you’re also wondering what else to plant this month, this guide on what to plant in October by zone will help you line up the right crops for your garden.
Perennials To Prune In October By Zone
Zones 3-5: Cold Climate Perennials To Cut Back
For peonies, if you’re unsure how far to cut, this article on fall cut back or leave through winter, it goes into more detail.
Zones 6-7: Moderate Climates, Longer Fall Season
Zones 8-10: Mild Winters & Extended Growing
If you’d like your garden to stay beautiful and help critters through winter, take a look at which plants not to cut back in fall if you want to help the birds.
Some Perennials To Leave Alone In October
Sedums:
Sedums generally hold their shape through frost and snow pretty well. To add to that, their seedheads look absolutely stunning in an icy garden landscape.
Black-Eyed Susans:
Black-eyed Susan seedheads serve as food for finches and chickadees in the wintertime, so it’s best not to trim them down for now.
Coneflowers:
Even though I also listed coneflowers among the perennials you can prune in October, I’d rather leave them standing! Their seedheads are a winter feast for birds.
Russian Sage:
Silvery Russian sage stems and their gorgeous foliage are perfect for adding visual interest to the garden during the cold season. Trim back this dense-growing perennial in spring only.
Lenten Roses:
Evergreen lenten roses (or hellebores) foliage helps protect the crowns in winter, so you might want to consider trimming bad foliage in early spring instead.
If you’re planning ahead for more color, this list of flowers to sow in fall for spring blooms by zone is full of ideas that pair well with a tidy perennial bed.
Let’s Conclude
Now that you’ve understood your garden duties for the month of October, it’s important that you fulfill them timely and not delay pruning any later than this.
The reason I say this is because the more you wait, the deeper the trouble your perennials can potentially get into due to the emerging cold.
You want to remain agile and take quick action, especially in the month of October, when the stakes can be somewhat high compared to pruning in mild or slightly warm conditions. Good luck!
When should I cut back reed grass? Does this multiply?
Hi Katie! 😊 I cut my reed grass back in late winter or very early spring, before new growth starts. And yes, it can spread a bit over time, you can divide it every few years to keep it tidy.
I need advice for a couple large butterfly bushes in big pots, not in ground. They overwintered in my unheated garage from November-March (southeast Missouri) and I pruned some in early spring. They are quite large again. Am I caring for them correctly?? Thanks.
Hi Jane! 😊 Sounds like you’re doing great! Keeping them in the garage over winter is perfect for your zone. Just cut them back again in late winter or very early spring before new growth starts, they’ll bounce right back.
Thanks for this guide to pruning. Should I prune my Hydrangeas? Also I was given a Mother’s Day gift of hydrangeas which I planted. It seems stunted in growth. What causes this? Also it had no blooms this year except for the initial blooms when it was given to me. Can I expect blooms next year? Thanks!
Hi Judy! 😊 It depends on the type! Some hydrangeas bloom on old wood, others on new. If yours bloomed when gifted but not after, it’s likely an old-wood type, so skip pruning this fall. Give it some compost in spring and it should bloom again next year!
I found your comments & information very helpful & interesting…. much U didn’t know. I’ve gotta look up to learn my area zone for plant care.
Hi Joyce! 😊 I’m so glad it helped! Finding your zone makes everything easier, it really changes when and how you prune or plant. You’ll love how much smoother gardening gets once you know it!
What about roses do I need to cut them back now
Hi Lori! 😊 I’d wait a bit, just remove dead or damaged stems now, but do the main prune in late winter or early spring once the hardest frosts have passed.
What about zone 8? Texas can be zone 7 or 8
Hi Melanie! 😊 In Texas, most perennials can be cut back a bit later, usually late fall or even early winter once they’ve fully gone dormant. Just hold off until the foliage dies back naturally to protect them from any early cold snaps. Salvia, coreopsis, Shasta daisy, Veronica, and coneflowers can all be trimmed in fall once blooms fade. Just leave a few inches of growth to protect the crowns through winter.
How take care lantana in a hanging basket in Colorado. Thinking of wintering in my garage. Might have room in maintenance closet with heater that comes on at 50 degrees. Want to plant in big pots come spring.
Hi Judy! 😊 Lantana can handle a bit of chill, but not freezing temps. Your heated closet at 50°F sounds perfect, cut it back lightly, water just enough to keep the soil barely moist, and it should wake back up nicely in spring for your pots.
When should cut back zebra grass?
Hi Meg! 😊 I wait until late winter or very early spring to cut back zebra grass, just before new growth starts. It adds nice winter texture and protects the crown from cold.
I love the Rio plants. So pretty, deadheads themselves, drought tolerant loves sun. Can I save them? They are annuals….
Hi Coleen! 😊 Rios are gorgeous, but sadly they’re true annuals, they won’t survive once the season ends. The best you can do is collect seeds and replant next year. They’re super easy to start again in spring!