When to trim back knockout roses and how much!!
jess2132000
16 years ago
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diane_nj 6b/7a
16 years agoTerry Crawford
16 years agoRelated Discussions
will knockout roses come back after hard prune?
Comments (5)You did nothing wrong! You could use a hedge trimmer to cut them down (though I don't recommend that) and they'd still grow back strong. Pruning any rose encourages new growth so you'll be surprised how quickly they'll spring back up. Make sure you've cut out all dead canes, canes that point directly into the center of the rose (to open the center for good air flow to prevent disease) and any crossing or rubbing canes. If you cut off the spent flowers after they bloom you'll get a bigger rebloom the next round. And you can cut them down some during the season if they're getting too tall or out of shape. It won't hurt them!...See Morepruning back Knockout roses
Comments (3)Rule of thumn: never take off more than a third of a plant. But you don't have to prune them to get them to booom again. Your KOs may not be blooming much now because of the heat. Roses, like you and me, don't want to do much in the heat. Blooming takes work and they prefer to preserve their energy and just kick back....See MoreKnockout Rose die back
Comments (7)I trim my original WAAAy back often as they get wild and weedy/The double is much more controlled. I have had a branch here and there die but not the entire bush I THINK they are still under investigation as to how well they do for how long(in our climate) I just saw they have one at the research lab garden.The gardener said they are seeing how it does here. Remember too all things have a life span. I figure plants to be like people.Some may make it to be octogenarians and some won't make it out of the nursery alive. Sad but true. tanya...See MoreHow large will my knockout roses grow?
Comments (4)At least here in my zone KOs can grown pretty big. I see them in flower beds here that are 6x5 but suspect they aren't pruned at all and if they are it is with hedge trimmers since they are shaped with some being boxy. My next door neighbor pruned hers down to about 24" tall in February and her bushes are now about 4x3'. Apparently it doesn't hurt them to prune them back that much if you want to keep them smaller...See Morebarb_r
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