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Gardening Know How Questions & Answers - https://questions.gardeningknowhow.comAfter the beetles have eaten about half the rose leaves and have been killed by Sevin spray, should the bushes be trimmed back or what?
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1 Comment To "Caring for Knockout Roses Damaged by Japanese Beetles"
#1 Comment By roseman On 06/28/2012 @ 8:02 pm
Leave them alone for a while and see where the new growth comes in at. Then you can prune back as needed to re-shape the rosebushes. Pruning them back now would add more stress to them and would also probably be far more pruning than is needed. If you can find a product called Super Thrive where you are, mix a tablespoon or two of that with some root stimulator in a big watering can. Water the rosebushes with that mix a couple times about 10 days apart. It helps with shock and stress.