Why is this rose struggling to wake up? Black spots on stems
Omar (Z6, Northwest Ohio)
11 days ago
Featured Answer
Sort by:Oldest
Comments (7)
jim1961 / Central Pennsylvania / Zone 6
10 days agoRelated Discussions
Black spots on roses- cut all leaves? :(
Comments (20)To all the blackspot sufferers, I feel your pain. For what seems to be no reason at all, my Hybrid Tea rose bed came down with the worst case of blackspot I've ever seen. Finally switched to Bayer Disease Control for Roses, etc. after I realized realized Ortho Rose Pride wasn't doing anything and Daconil wasn't much better but very expensive. For some reason, the Bayer products seem to do a better job for me. Also using Bayer's Merit as a drench on an ash tree-ash tree borer is a BIG problem here-and after three years, so far, so good. Here's a question: Planted a Cornelian Cherry Dogwood this Spring about 30 feet away from the rose bed. Could it possibly be a host for the blackspot. I have started spraying it as well as it also has a fungus attacking. Just wondering... MM...See MoreCleanup important if roses have black spot
Comments (23)I think I found a possible explanation for what I've observed often enough to keep bringing up that I don't strip on the first sign of leaf infection. If this does explain it (or if it's a good theory anyway), then it does seem to have to do with my choice of roses or the aggressiveness (lesion expansion rates) of the local strains of BS here. From http://www.rosehybridizers.org/Fall_2012_Zlesak_long_version.pdf "...We have blackspot resistance field data for the roses that are designated Earth-Kindî in the South Central US. As we correlate the mean lesion size in the lab with the percentage of defoliation due to blackspot in the field, r=0.62...So in this case there is a pretty strong trend that as lesion size goes up for a rose in the lab, the more defoliation we see for that rose in the field. Since different isolates of different races can be more aggressive and lead to different lesion expansion rates, it is very promising to see such a strong correlation in the midst of that variability. As more blackspot resistance data are collected from other ongoing Earth-Kindî trials involving some of these 70+ roses, it will be interesting to revisit the correlation between the laboratory and field data...." And the RHS has seen what I'm talking about, so at least I don't feel so crazy ;) http://apps.rhs.org.uk/advicesearch/Profile.aspx?PID=270 "Typically, a rapidly enlarging purplish or black patch appears on the upper leaf surface, with diffuse and radiating strands of the fungus sometimes just visible. Leaf tissues may turn yellow around the spots and the leaf often drops, even though other parts are as yet unaffected. At other times, the yellow colour does not appear, but infected leaves still drop. Sometimes, the spots remain relatively small and the leaf does not drop. [!]" I'm not trying to tell anyone how to do anything if it goes counter to their local experience, of course. I guess I'm saying that folks might wait a bit and see what happens if they don't strip leaves if the plant will be very defoliated if they did strip so many leaves that don't look too bad. See what happens, perhaps. Or not :) Here is a link that might be useful: Strategies and resources for breeding blackspot resistant roses, DAVID C. ZLESAK...See MoreOBF Wake Up It's Spring!!! April swap
Comments (91)Hey everyone! Remy! Love your video. That lilac did look super tough to be blooming for being so little. Michelle, So sorry to hear about your migraines! They are the worst!! I received my package from you today though :D In my package was: Iris: Maid of Orange (LOVE IT!) Iris: Batik...so pretty! Aloe baby Tropical Milkweed 3 mystery daylilies ( I can't wait to see them flower!) Will be planting them tomorrow for my mother's day garden day! :) And I received a beautiful card, miracle grow singles (I've never seen these before! They look way more easy to use than the big boxes I buy), and last but certainly not least the absolute cutest cactus I have ever seen!! I am not a cactus person, but this tiny little baby cactus is on a magnet flowerpot! And its alive. I love it!! Thank you Michelle!! everything was just wonderful! I hope you feel better soon! And everyone have a terrific weekend. Talk to you later! vina...See MoreBack from the dead - why I never give up on a wintered rose till June
Comments (16)nickjoseph and nippstress: The name of the rose is Spectra, and that is how it looked yesterday. In 2014 it emerged around July 15 after that brutal winter. It did not flower, and was a weakling in 2014. Now it has 12 basal breaks, and is back to normal. Spectra is a large flowered climber; in France it is considered a hybrid tea if memory serves me correctly. Usually we cannot grow large flowered climbers in the Midwest. I planted two of these elsewhere in town and they died within 2-years. Behind my office where this is grown I have a microclimate that is probably more like Zone 7, with a southern exposure. I have buildings on the West, my shorter building on the North, and a longer one on the East that block the wind. In other words this rose bed is in the inside of a U facing south. I planted a small bed of 5-roses about 15 years ago when I moved in and they grow amazingly well. I have had almost no disease issues in this bed. The Prince gets 4 feet wide, and 5-6 feet tall. Spectra when it comes up timely like it is this year usually gets 8-9 feet tall. About 8-years ago I put a cane in the ground and it grew into a rose bush (Polarstern). If you have any tips how to post pics, I'd appreciate it because it is hit or miss for me. I posted pics on this site more than a decade ago, and even 4-5 years ago on the fruit and orchard subsite, when this site had a different interface. Now, I cannot figure out how to reliably post pics within a post....See MoreOmar (Z6, Northwest Ohio)
10 days agoOmar (Z6, Northwest Ohio)
10 days agoMoses, Pittsburgh, W. PA., zone 5/6, USA
10 days agolast modified: 10 days agoMoses, Pittsburgh, W. PA., zone 5/6, USA
10 days agolast modified: 10 days agoSheila z8a Rogue Valley OR
10 days ago
Related Stories
GARDENING GUIDESGreat Design Plant: Callirhoe Involucrata Wakes Up Hot Garden Spots
Give a dry and sunny garden a jolt of violet-pink color summer to fall — and watch bees and butterflies flock to the nectar
Full StoryGARDENING GUIDES5 Favorite Yellow Roses for a Joyful Garden
Make 'cheery' the name of your garden game when you order your roses sunny side up
Full StoryGARDENING GUIDES6 Wonderfully Easy Roses for Any Gardener
Look like an expert even if you're just starting out, with these low-maintenance gems of the rose world
Full StoryPLANTING IDEASGreat 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
Full StoryGARDENING GUIDESYou’re Going to Want to Stop and Smell These Roses
See top picks from David Austin’s most fragrant roses in colors ranging from ivory to crimson
Full StoryBATHROOM DESIGNSpotted: Refrigerators in the Bathroom
You read that right. Before you protest, here are seven good reasons why people are chilling in the bath
Full StoryLIFEMorning Nook Tips for Sleepyheads to Get-Up-and-Goers
Whether you whack the snooze button or spring out of bed, these ideas can help you create a refreshing space that helps you on your way
Full StoryKITCHEN DESIGN12 Items Worth a Spot on Your Kitchen Counter
Keep these useful tools and accessories out in the open to maintain high function without spoiling the view
Full StoryGARDENING GUIDESRoses: Crowning Touch of Gardens
Whether you're the Miss or Mister America of gardening or take a hands-off approach, roses can be a winning addition to your landscape
Full StoryCOLOR11 Reasons to Paint Your Ceiling Black
Mask flaws, trick the eye, create drama ... a black ceiling solves a host of design dilemmas while looking smashing
Full Story
Moses, Pittsburgh, W. PA., zone 5/6, USA