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Harlequins Gardens

Harlequins Gardens

Boulder's specialist in well-adapted plants

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Home | Plants | Cutting Back Ornamental Grasses

Cutting Back Ornamental Grasses

Historically February is one of Colorado’s snowiest months, and finally we’re beginning to see evidence of that this year! Additionally, the forecast indicates more to come.  It remains to be seen how some of our marginally hardy garden plants have suffered from the below zero temperatures.

Many of us may have the tops of ornamental grasses and various perennials peeking out of the blanket of the snow, which provides habitat for overwintering beneficial insects and it helps to keep the plant roots and crowns warmer. But very soon it will be time to cut back Cool-Season ornamental grasses before their active growth begins, which will allow light to penetrate the entire clump.  See Eve’s instructions, below. 

Last fall we shared information on the three main types of grasses: cool season, warm season, and evergreen.  In addition, we profiled some of our favorite grasses in each grouping. Read the article.

Each season we add new and interesting grasses for your garden, and this year will be no different.  Some of our debut grasses include:

COOL-SEASON
Harpochloa falx ‘Compact Black’ (Compact Black Caterpillar Grass)
Heirochloe odorata (Sweet Grass)

WARM-SEASON
Eragrostis spectabilis (Purple Love Grass)
Bouteloua dactyloides (Buffalo Grass)
Muhlenberghia montana (Mountain Muhly)
Sporobolus cryptandrus (Sand Dropseed)


Following are instructions on how to best cut back your ornamental grasses

Cut down cool-season grasses in February, before spring growth resumes, leaving about 2” to 3” of the previous year’s growth. This will prevent tearing the leaf-tips of the new, early growth, and will admit light for the new growth to flourish.

Wear gloves and long sleeves, and use sharp hedge-shears, a scythe, or a power hedge trimmer, and try to make a level, flat cut. Blue Avena, Mexican Feather Grass, Blue Fescue, and some Sedges (Carex species) are evergreen or semi-evergreen and should not be cut down (dead blades can be ‘combed’ out with fingers or hand-rake). Even in a meadow setting, consider mowing or scything the grasses to simulate the effects of wildlife hoofs and foraging, which have benefits for the soil and the plants.

Cut down warm-season grasses in early April, before new growth begins as above, close to the ground (to 3 – 4”).  Wear gloves and long sleeves and use sharp hedge-shears, a power hedge-trimmer, or a scythe.

TIP:  Before cutting down a clump grass, especially a large, thick one, wrap and tie the clump tightly with twine or a bungie cord 1- 2’ above where you will cut. This will reduce the clean-up considerably.  You may also want to enlist the help of a buddy to hold the clump as you cut it.

(The photos below illustrate this technique, typically utilized with larger grass clumps.)

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We do not ship plants!

Our plants are for sale ONLY at our Boulder location. We DO NOT ship plants. Come visit us!

Hours by Season

MARCH HOURS
Thursday-Sunday, 9AM-5PM

APRIL-OCTOBER HOURS
Tuesday-Sunday, 9AM-5PM

Mondays, CLOSED

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Contact Us

303-939-9403 (Retail)
staff@nullharlequinsgardens.com

4795 North 26th St
Boulder, CO 80301

Sign-up for E-Newsletters!

Sign-up for our weekly e-newsletters to receive empowering gardening tips, ecological insights, and to keep up on happenings at Harlequin’s Gardens — such as flash sales and “just in” plants. We never share customer’s addresses!

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Our Hours

Seasonally, MARCH to OCTOBER.
MARCH HOURS:
Thursday-Sunday, 9AM-5PM

APRIL-OCTOBER HOURS:
Tuesday-Sunday, 9AM-5PM

Mondays, CLOSED

The plants we grow are organically grown. All the plants we sell are free of bee-killing neonicotinoid pesticides.