skip to main content

Knockout roses twisted leaves & small blooms

11 years ago

Second year since planting and doing great but seeing patches of twisted leaves in certain areas of the plant

Almost like insect or disease related but nothing dead or apparent

Trying to attach a couple pics but can't

My email is jp4120@live.com if anyone interested in receiving a pic

Wondering if anyone has seen this?

JP

Featured Answer

Sheila z8a Rogue Valley OR

8 months ago

I've heard that 3 in one is not good for plants. Maybe skip that.

Sort by:Oldest

Comments (13)

dublinbay z6 (KS)
11 years ago
To post a picture, get a free account at photobucket.com. Follow their easy-to-follow directions on how to upload your pics to their site. Find the "HTML CODE" (it must be the HTML CODE)--copy and paste it over here in the message box. Click on PREVIEW to see the pic.

You can type before and after the pic (HTML CODE) if you wish and/or add several pictures.

Hope that helps.

Kate
jerijen
11 years ago
Also -- It would be helpful to know where you are located.

Jeri
Coastal Ventura County,
SoCal
Related Discussions
Knockout rose blooms 1/1/2010 in 30 degree temps
Q
Comments (8)
Not a big deal really. All the visible roses in town here, at the parks, in front of the court house, at the bank are all Knockouts and all blooming profusely. The temps the last several days have been in the teens at night and only in the thirties during the day. To have this sort of wintry blast here in southeast Georgia is very unusual, but evidently Mother Nature hasn't told the Knockouts yet. Any day now, I expect my Oldblush to burst into bloom, as it does every year at about this time.
...See More
knockout roses - help! leaves looking awful - photo included
Q
Comments (12)
That's definitely a bag worm. Usually I find them on my Aroborvitaes and Junipers, but a few can end up on other plants as well. They can really do some damage if left unattended and are particularly hard to treat on tall evergreens. Every one of the bags left behind can contain as many as 200 eggs which will be ready to infest your plants again next year. They usually begin to feed and form bags around the first of June in my area of NE OK., so be on the lookout next year about this time. If you can catch them when they first appear BT works as well as anything and won't harm beneficials. You will need to spray more then once to catch new hatchlings. Make sure the BT is fresh. We weren't having much luck with BT and discovered there's a world of difference between fresh and old. Use a spreader sticker. Some people not familiar with our area may not understand just how hot AND humid it is now. So be careful when you spray. You need to spray ideally when the temperature is 85 or below and make sure that in this drought your plants are fully hydrated before you do spray. I've burned plants spraying when it was too hot. Best time of course is in the cool of the morning...Last year we had a major infestation on our Arborvitae and sprayed 3 times with frest BT. This year (fingers crossed) I haven't seen any hatchlings - yet. ........Maryl
...See More
My Knockout Rose Bushes- Did I kill my rose bushes?
Q
Comments (2)
Right, don't fertilize until they have recovered and have put out plenty of leaves. Bloom Buster is the wrong kind of fertilizer--regular Miracle Gro or Miracle Gro for Roses is fine, or any reasonably balanced fertilizer such as 10-10-10 or 18-6-12. Watering correctly is the most important thing. Keep a 2" mulch of leaves or bark around the roses. When the soil under the mulch feels dry-ish, water thoroughly with 2-3 gallons for small plants or 5 gallons for larger, plus or minus for extremely hot or very mild, cloudy weather. Usually once a week is fine. For new plants, I divide the ration in half and water twice a week.
...See More
Knockout Roses only bloomed once
Q
Comments (13)
Probably fall is not the time to apply granules. I am not an expert on this, but I believe the recommendation is to apply granules at bud-break in spring. The midge pupa overwinter in the soil in cocoons. Only a small percentage survive winter and emerge as winged adults, which fly up to lay eggs on the new shoots. These hatch into tiny maggots which do the damage. There are several generations per season, each larger than the previous. After feeding for a couple of weeks, the maggots drop off to pupate in the soil, at which time they are vulnerable to insecticide in the soil. You can also spray the top growth to catch the active larvae. Recommended chemicals are imidacloprid for the soil and cyfluthrin for the spray. These names appear in the fine-print active ingredients, regardless of brand names. "Merit" is a brand name for imidacloprid.
...See More
cecily
11 years ago
I've had a cool, wet spring in northern VA then suddenly the weather turned HOT (mid 90's) and the new growth on several roses is blackened and crispy. Have you had an extreme weather change?
Brittie - La Porte, TX 9a
11 years ago
Aphids or hot weather was my first thought.
michaelg
11 years ago
Or a whiff of herbicide. Roses are extremely sensitive to them.
hartwood
11 years ago
Without knowing where you are, my initial inclination lately when I hear of abnormal, twisted grown in Knock Out is to suspect Rose Rosette Disease. Herbicide damage can also cause abnormal growth. The two types of damage look similar, but distinctly different from each other. If that makes any sense.

The attached photo is a fairly advanced case of RRD that I photographed while sitting in the drive-through line at Sonic in Ashland, Virginia.

(I'm attempting GW's new image file upload ... wish me luck.)
jerijen
11 years ago
Worked great.
Looks awful. :-(

Jeri
michaelg
11 years ago
I trust hartwood's understanding, but, with only that long-distance shot to go on, my first guess about the Sonic rose would be Roundup damage rather than rosette disease. If it spread gradually through the plant, it is rosette. If it happened all at once, it is Roundup. A closeup might show that it is rosette, but the thin, curly, wiry look does commonly go with Roundup.
professorroush
11 years ago
Wow Connie, that's what I call a "teaching picture"....bad enough so everyone winces.
c_lejune
6 years ago
Wondering if roundup damage to knockout roses can be salvaged or if they will come back? Please help.
HU-872606999
8 months ago
Ok i have a petite pink drift knockout.. which after replanting to a pot developed a similar sounding problem…first off i realized pot was not draining well so took it out of the pot washed off roots and repotted with new soil. trimmed the branches that had curling leaves back, used Bayer 3 in one fertilizer, antifungal, insecticide granules and worked into soil around base and watered from under foliage. repeated again this season and noticed same with curling leaves and shimmery white coating as well. i cut it back leaving only healthy clear stems and leaves..removed all debris off soil and bagged and tossed. reapplied Bayer and its looking much better. I’ll give it one more season before I rip it out! 😂👍
Vaporvac Z6-OhioRiverValley
8 months ago
Any chance of a picture? Could be a lot of things so best to See what it might be.

Related Stories

FLOWERS 8 Knockout Flowers for a Fall Container Garden

Your cups will overfloweth with color and interest this fall when you plant these vivid seasonal garden classics

PLANTING IDEAS Great Garden Combo: Rose + Clematis for Small-Space Impact

We all need somebody to lean on. And when a rose supports a climbing vine, the results can totally transform a small garden

WINTER GARDENING Pruning Secrets for Exquisite Roses

By Annie Thornton

Encourage gorgeous blooms year after year with this time-tested advice on how to prune your rosebush in winter for health and shape

LANDSCAPE DESIGN Give Curb Appeal a Self-Serving Twist

By Billy Goodnick Garden Design

Suit yourself with a front-yard design that pleases those inside the house as much as viewers from the street

HOUSEPLANTS How to Force Amaryllis Bulbs Indoors

By creative jewish mom.com

Enjoy vibrant red blossoms even as gardens turn snowy white, by teaching this hardy repeat performer to ignore the calendar

GARDENING GUIDES Top 12 Summer-Blooming Perennials for Deer-Resistant Drama

Can you have garden color, fragrance and exciting foliage with hungry deer afoot? These beauties say yes

GARDENING GUIDES Great Design Plant: Amelanchier Signals Spring With Airy White Blooms

By Ellen Sousa/Turkey Hill Brook Farm

With roughly 20 species of serviceberry native to the U.S., bees can feed on the early-season blooms while birds enjoy the summer berries

GARDENING GUIDES Great Design Plant: Knock Out Roses

By J. Peterson Garden Design

As glorious as their high-maintenance kin for a fraction of the work, Knock Out roses make even beginners look like garden stars

GARDENING GUIDES Learn the Secret to Bigger and Better Roses

By Noelle Johnson Landscape Consulting

Grow beautiful roses using both ordinary and unusual soil amendments

GARDENING GUIDES What Kind of Roses Should You Grow?

By Noelle Johnson Landscape Consulting

Want to add the beauty of roses to your garden? Find out which ones, from old-fashioned to modern, are right for you

Sponsored

Integrity Woodworking Inc

4 Reviews

Franklin County's Preferred Custom Cabinetry Professionals

More Discussions

4

Teasing Georgia is nice pale or bright

10

This May is Not Gray

5

Kate roses? Japanese roses in SoCal

1

Questions About Feeding These To Container Roses

10