Over on GardenRant I offered my succinct 39 Words on how to garden in the summer and thought I was done with the subject. But then I remembered HACKING BACK, one of my favorite activities in the garden. If you’re not familiar with the notion then I bet you haven’t read Tracy DiSabato-Aust’s best-selling Well-Tended Perennial Garden. No problem; I’m sure they’ll just keep printing the thing until we all have one - and learn to grow healthier and better-looking perennials.
Here’s how it works. The asters in the foreground of this photo, if left to their own devices, would grow tall enough to be flopping failures as plants; let’s face it. So I do just what Tracy tells me to do - I hack ‘em back to half their height twice, once in May and once in mid-June. So they’ll bloom a tad later but they’ll never flop on me.
Just behind the asters you see the Echinacea purpurea or purple coneflower just starting to bloom, which I’d hacked back once in May. Tracy says you can either do what I did, hacking back early, or cut off about a foot of the plant while in bud in early July, noting they’ll "recover and flower nicely from mid-August until early October." Well, in my copy of her book I wrote the decisive marginalia "NO" next to that point, so don’t say I didn’t warn you. Just goes to show once again that even the smartest of experts can’t predict exactly how plants will behave in our own gardens.






{ 7 comments… read them below or add one }
Heather 07.10.06 at 6:45 pm
Ah! Where has this book been all my gardening life? Appears there’s an “expanded edition” coming out. I believe I shall instruct Amazon to pre-order it for me, TYVM. Thanks, Susan! I’ve been thinking for 2 weeks if I should shear back my new coreopsis. Don’t suppose you could fill me in on that one before my copy of the book arrives?
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Takoma Gardener 07.10.06 at 7:03 pm
Okay, Heather, but only for you. A preview: assuming you’re talkiong about C. verticillata, Tracy says first-year plants bloom all summer w/o deadheading, but after that they benefit from it. Says for stronger rebloom, plants can be sheared in august using hedge shears or a string trimmer.
OldRoses 07.11.06 at 9:44 am
I have to get this book! You wouldn’t believe how tall my asters get. They flop every year. heck, they’re starting to flop now!
Judith 07.11.06 at 10:23 am
Hacking back is good advice. It’s helpful to put a ‘hack back date’ on just about every perennial in the garden. I was hacking back last night & it is quite satisfying. I have the book, Well-Tended Perennial Garden–thanks for reminding me it is sitting on the shelf!
Heather 07.11.06 at 5:16 pm
Thanks Susan! I’ll leave it alone as it’s a new baby in the garden.
Repellent Review 07.13.06 at 10:34 am
That’s a nice tip. My asters always go crazy and I’m not sure what do do with them.
Annie in Austin 07.13.06 at 11:56 am
You can keep the full size Platycodon/Balloon flowers from flopping by cutting them back, too. Cut the stems in half once the plant is about 16-18 inches tall, which makes them bushier but does delay the bloom. Do any gardeners still plant these old-fashioned tall Balloon flowers? The nurseries carry mainly small varieties like ‘Sentimental Blues’ or ‘Miss Tilly’.