The Secret to Deadheading Plants

Picking off dead flower heads not only tidies up a plant but also channels its energy into growth and the production of new flowers.
Related To:
Deadheading Zinnia

Deadheading Zinnia

Removing spent blooms encourages plants to form new flower buds.

Photo by: Julie Martens Forney

Julie Martens Forney

Removing spent blooms encourages plants to form new flower buds.

What to Deadhead 

Although not an exact science, there are a few guidelines: 

  • Large flowers, such as those of some pelargoniums, can be snapped off individually. The soft stems of most perennials are easily pinched through. 
  • If the tall flowering stems of delphiniums, lupines, and foxgloves (Digitalis) are cut off, new smaller heads might sprout lower down. 
  • Dainty plants with small flowers such as lobelias are best trimmed using scissors. 
  • For repeat-flowering roses, cut off blooms with pruners at the cluster point, either one by one, or just above a leaf. 

Shearing Back

An easy way to deadhead some plants is to trim them back with shears. Trim after flowering for more flowers, fresh foliage, or both. Try this with border campanulas, catmint (Nepeta), hardy geraniums, knapweeds (Centaurea), border salvias, and pulmonarias. 

In early spring, shear back growth of winter-flowering heathers (Erica carnea), ling (Calluna), periwinkles (Vinca), St. John’s-wort (Hypericum calycinum), and ornamental grasses, taking care not to cut into the new shoots. Also shear off old leaves on epimediums in late winter, before they flower. Cosmos will bloom almost continuously throughout summer and up to the first frost if you continue to deadhead it. Take the long flower stems back to the ferny foliage below.

Leave to Seed 

Not all plants need deadheading. Some will not produce more flowers, and may develop seedheads if flowers are left in place. These may be very attractive, especially in winter, and the scattered seed could result in a crop of seedlings the next year. Try leaving the flowerheads on the following plants: 

  • Achillea 
  • Astilbe 
  • Clematis like C. tangutica, C. orientalis, and their hybrids 
  • Eryngium 
  • Ornamental grasses 
  • Poppies 
  • Sedum 
  • Teasel
Keep Reading

Next Up

How to Plant Perennial Flowers & Plants

Perennials are the mainstay of the traditional flower garden. When planted correctly, they are long-lived.

Garden Plants and Flowers

Learn how to discover which plants underscore and help define a specific garden design style.

Planting Annuals: When and How To Plant Annual Flowers

Learn the ins and outs of planting annuals, including when to plant annuals and techniques you can use to boost success.

The 10 Essential Steps to Planting Perennials

Get your perennials off to a solid start and they’ll reward you with many seasons of color.

How to Plant Evergreens in Containers

Learn how to properly plant evergreens in containers to keep color alive in your garden all year around.

How to Plant Blueberry Pots

These berries are regarded as superfoods because they're high in vitamins and antioxidants. Here's how to grow blueberries in containers.


Follow Us Everywhere

Join the party! Don't miss HGTV in your favorite social media feeds.