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Perennials: Suggestions for a Leggy Agastache "Heatwave"?

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a5footsea
North Vancouver, BC
(Zone 7b)

December 4, 2011
9:38 AM

Post #8915928

Hello there ... this forum has been quiet lately, but I'm hoping someone can help me with this question.

My 3 year old Agastache "Heatwave" suddenly sprang up to 6 feet high, with an extremely leggy habit. It's in a west-facing garden.

Could I pinch off the new growth to get the habit back down to its advertised height - 36", or will that just prevent flower growth? Does pruning back encourage more growth from the crown?

Any help is appreciated.

Thanks,

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K_Carter
Elk, CA
(Zone 9a)

December 4, 2011
5:44 PM

Post #8916405

Cut it to the ground for the winter. It should grow back abundantly in the Spring. Other than limiting the water -which may be difficult in BC - I know no other way without PGRs to keep these wild growers short.

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