Chelsea Chop is the catchy new name for a classic gardening technique
And that's a good thing because it popularizes a useful technique.
What's involved in the chop
The method involves pruning certain perennials — those with clumping roots, like coneflower (Echinacea), black-eyed Susan (Rudbeckia), goldenrod (Solidago), sneezeweed (Helenium), Salvia and yarrow (Achillea) — by cutting each stem back by one-third to one-half its height in spring. Cuts should be made on the diagonal, just above a leaf node.
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The 'chop' forces plants to produce bushier growth, resulting in sturdier, tighter and fuller plants that aren't as likely to grow leggy, require staking or flop over by the end of the season. It also delays blooming, which can benefit the late-summer garden.
You might get creative and prune only alternate stems so that some bloom earlier and others later — or prune only half of your plants — to extend the blooming season.
Do not attempt this with one-time bloomers, single-stemmed plants or those with woody stems; the amputations would be homicidal to the current season's flowers.
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This image provided by Jessica Damiano shows the pruning of the top third of a chrysanthemum plant. Three such carefully timed prunings each year will result in fuller, sturdier plants.
Jessica Damiano/Associated Press
When should you chop?
Gardeners should consider their climate and prune when their plants have grown to half their expected seasonal height, whenever that may be. (The Chelsea Chop is done at different times in different places, depending on plant emergence and growth.)
A variation for late-summer and fall bloomers
To take things a step further, some late-summer and fall bloomers, like Joe Pye weed, chrysanthemum and aster, would benefit from three annual chops.
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In my zone 7, suburban New York garden, that means cutting them back by one-third each in the beginning of June, middle of June and middle of July. Customize the schedule for your garden by shifting one or two weeks earlier per warmer zone and later per cooler zone, taking the season's growth and size of your plants into account. Make the first cuts when plants reach half their expected size, the second two weeks later and the third about a month after that.
I'd like this fall-plant pruning tip to catch on as well as the Chelsea Chop has. Maybe I should call it the Damiano Downsize and see what happens.
Jessica Damiano writes weekly gardening columns for the AP and
publishes the award-winning Weekly Dirt Newsletter.
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