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Knockout Rose Bushes

Q.My Knockout Roses Were Blooming, but Have Quit

sthancock added on April 30, 2011 | Answered

My knockout roses were blooming, but have quit. Do I need to fertilize them?

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Answered on May 15, 2011

If the temps are in the high 90's to 100's where you are the rosebushes could be just taking a break to gain strength back. Heat stress will do this. Sometimes they do take a break between bloom cycles to regain strength. If you have not fertilized them at all or it has been a month or more, then yes fertilize them now. Make sure the soils moisture is good before and after feeding them as well.

Stan the Roseman
Consulting Rosarian

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