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The plant is abut 5 years old, it gets lots of leaves and looks great in spring, but now it lost most of the leaves and the subsequent flowers do not bloom fully and the japanese bug gets into the bud and the flowers does not even bloom. I tried the bayer spray, but it didn't help. Do we need to put some fertilizer for rose plants ? The brown spots on the leaves is cause of the spray or the japanese bugs?
Location: East of Seattle since 1992, 615' Elevation, Zone 8b - originally from SF Bay Area
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You have Blackspot, which is very common in our area. It's a fungal problem that turns the leaves yellow with black spots and weakens the plant. You should snip off all of the affected leaves and put into the trash, do not leave nearby or it can spread. The best product for this is Rose Defense, which contains not only fungicide but also some insecticide and miticide to control other pests. Normally fungicide treatment would be done after early spring pruning (as above) and removing any leaves left over from last season or new ones that came in too early. Then repeat about every two weeks until the rains stop. The smell/taste also helps keep deer from eating the leaves, if you have that problem.
Looks like your variety is susceptible to black spot and that, along with other issues (fertilizer, pruning) is causing your issues.
Easy rules of rose pruning-
ALWAYS sterilize your pruners between bushes and after use.
Throw away anything that looks diseased - do not compost.
Clean up ALL leaves around the plant.
This is why I no longer grow hybrid teas, old garden roses, English roses or anything other than Knockouts, and even they have their problems. I had 25 high-maintenance roses in Chicago. Moving to Kansas was hard for me, but knowing I was leaving those rose bushes behind made it so much easier.
As for Japanese beetles, I had battles with them from earaly June until mid August every single year. They ate all the rose blooms. No pesticides worked, not even the really nasty ones. When we moved to Kansas, we moved away from the beetles, too, though they are just beginning to appear here now.
I've moved two plants like 4 times in the past 6 years and the poor things keep taking the abuse. I feel sorry for how badly I treat them and they keep blooming and blooming.
I love, love the knock outs....I moved from a home where I had put in the carpet roses, another low maintenance rose, and was thinking the roses I had were knock outs and bought some. It wasnt until i was recently rummaging thru my garden wagon, found the capet rose tags, and was reminded once again my memory has gone to shizzle.
Both fabulous, easy, almost 100% maintenance free roses.
OP, yes . . . those roses need feeding! Also be sure they get 1" of water per week, and see a book or youtube on how to prune roses this fall. I wonder if you're getting blackspot because there is too much shade? Roses like at least six hours of direct sunlight.
I agree about the Knockouts. However if the OP has kept this bush going for 15 years, s/he might be really attached to it and want to try reviving it.
OP, if not, consider Knockout roses, as mentioned. As long as they have enough light and water, they are almost problem-free. Certainly, they've had the fewest problems (like zero some seasons) in my gardens.
OP, yes . . . those roses need feeding! Also be sure they get 1" of water per week, and see a book or youtube on how to prune roses this fall. I wonder if you're getting blackspot because there is too much shade? Roses like at least six hours of direct sunlight.
I agree about the Knockouts. However if the OP has kept this bush going for 15 years, s/he might be really attached to it and want to try reviving it.
OP, if not, consider Knockout roses, as mentioned. As long as they have enough light and water, they are almost problem-free. Certainly, they've had the fewest problems (like zero some seasons) in my gardens.
thanks to all the replies...this rose flower is huge and beautiful, it is almost the size if you open your palm! So, would like to keep it there and do some pruning in fall and make it short! have other roses which i am replacing with knockouts!
Mine aren't the greatest but I get a few good color roses.
I cut mine down a lot each year. I spread Holly Tone or Rose Fertilizer every Spring.
thank you! i love your purple flowers! what are those ?
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