Battling Black Spot
When and how do I start treating roses for black spot?
When and how do I start treating roses for black spot? —Sandra Jennings, Cleveland, OH
Most roses—particularly hybrid teas—are susceptible to black spot, a fungal disease that can be devastating. If you already have roses with this problem, remove all spotted leaves from the plants (as well as any that have fallen to the soil) throughout the growing season. Before winter dormancy, get rid of infected leaves and trim or remove canes that show the same spotting.
Avoid overhead watering, especially late in the day, as moist conditions encourage the spread of black spot lesions. Make sure your roses are planted in sunny, exposed sites with good air movement so they’ll dry rapidly after rainfall. And next time you shop for roses, look for cultivars with some resistance to black spot.
In spring, once new foliage starts to unfurl, you may wish to begin a spray program with a recommended fungicide. (Check with your local cooperative extension service or a trusted garden center to find out which one is best for your location.) Fungicides won’t reverse damage that’s already present. They’re a helpful preventative, though, particularly during wet weather, when you can apply them as often as once a week.
Monday, August 30, 2010 5:42 PM
What do I use to stop my roses from being eated by ???????
Thursday, September 02, 2010 8:19 PM
Although I live within the city limits, I had a problem with deer eating my roses. I had tried commercial remedies, home remedies as well as marigolds none of which solved the problem. I have now erected a deer fence. I have 50+ roses in 3 different beds.
Thursday, September 09, 2010 2:09 AM
I have a beautiful red & white striped rose in a container that I planted last spring. The plant is approximately 4' high. This past summer it developed a fungus type of growth that spread out into a cobweb like disease. I used Bayer rose food and disease fighter on it twice, but that did not seem to help as much as constantly cutting off the sick leaves and scraping off this white powdery growth from the stems and the base of the buds. Now that the weather is cooling off, the problem seems to have gone away, and I am still getting new roses, but I am concerned that this problem will return next spring. Can you tell me what this problem is called from my brief description? Thanking you in advance, Linda Sasner
Friday, September 10, 2010 7:12 AM
I have discovered a product called "Deer Out" which saved my garden this year. Early in spring I lost a large hosta to deer. I immediately researched and found "Deer Out". One application lasts 90 - 120 days. I have lost another plant in my entire garden this year. To fight "black spot" on my roses I have planted a clove of garlic surrounding the bush and have had no problem with black spot at all this year. I have been told that chives or onions will work too. Thank you Jerry Baker!
Friday, September 10, 2010 7:14 AM
Slight correction: I have not lost a single plant to deer this year. I have also found the product to work for rabbits and racoons too.
Sunday, October 17, 2010 6:07 PM
To treat black spot on my roses i use this recipe that has solved the problem of those nasty black spots. It's truely a miricle mix.
Bye Bye Blackspot:
1 tblsp. of baking soda
1 tsp. of liquid dish soap
1 gal. of water
Mix these ingredients together (i use a 1 gal clean milk or water jug)
Pour solution into a hand-held mist sprayer, and spray leaves every three days during growing season.
I pick up fallen leaves and clip the leaves that are about to fall off. I burn the leaves in my burn barrel. You don't want to put them in your compost pile.
Rake up mulch under the plants, and get rid of it too.(It's probably harboring fungi spores). Then replace with fresh straw, pine needles, or (best of all) compost.
There'll be no more balck spot blues.
Another recipe is a spot remover tonic:
Use it at first sign of black spots.
15 tomato leaves
2 sm onions
1/4 cup of rubbing alcohol
Chop tomato leaves and onions into fine pieces, and seep in alcohol overnight. Then, use a small, sponge-type paint brush to apply the mix to both tops and bottoms of any infected rose leaves.
Sunday, January 16, 2011 3:17 PM
i take human hair i get from beauty salons and barbers
put around gardens and it keeps animals out of garden.
Monday, July 11, 2011 9:03 AM
HELP!!! Some of my roses look really sick, they are about bald of leaves. Need to know what should I do? I am pretty new to the rose world & need to help them quick?
Tuesday, July 12, 2011 6:04 PM
I did a lot of research and the remedy that kept coming up time and time again was coffee grounds and banana peels...so I figured, nothing ventured, nothing gained...right?
OMGosh...what a difference...my roses are beautiful...no black spot, just shiny green healthly leaves and the blooms themselves are spectacular! The ones in front...that is :)
Now, in my back yard, I have a rugosa rose that has aphids....I've sprayed with the bayer rose and flower spray...on the area where there should be blooms and under and on top of all the leaves ..up to five groups down, that's how far I've found them....coated the gound in coffee gounds and banana peels...taken my hose and literally blasted off the little devils and they keep coming back....the rose bush is planted beside a mint plant and a chive plant...both that are suppose to repell those little pests too....anyone with anyother ideas?
but for black spot the coffee gounds/banana peels worked wonders...I also took off all the infected leaves and racked up any that were on the ground...had been doing that for the past several months with no improvement until I spread that around the ground after.
Friday, August 05, 2011 10:30 AM
I have been fighting this Black Spot fungus forever it seems like. I have had to cut the whole Rose Bush away!!! They always start out Beautiful in the Spring and then Boom there it is again!!All of my new growth is covered! Then all of my leaves are falling off!! I have done the baking soda! And the Bayers!!Just can't seem to get comtrol of this bugger!! Even my Brand new roses! Ends up with this mess!!! And I Love my Roses!So does my Husband!! He just shakes his head in wonder!!Why did you cut the whole plant away!!I'm going to keep trying!! The coffee grounds and Banana peels sounds good!!Do you put right on the root part or just around on the ground? ONE DAY I WILL HAVE BEAUTIFUL ROSES!! I hope!
Tuesday, August 09, 2011 12:28 PM
Plant Basil at base of bushes. It seems to be systemic, as I tried putting basil in pots at the base and it didn't work.
Wednesday, November 02, 2011 3:25 PM
I have a neighbor that puts hair from a beauty shop in her flowers, YUK!!! It looks just nasty.....
Monday, May 28, 2012 10:27 PM
On some of my leaves there is what looks like a white powder.Is this from the insect spray I have been using?This is'nt the black spot thing is it?
Wednesday, May 30, 2012 3:03 PM
On the coffee grounds and bananna peels, does it work after the leaves have all fallen off? The bayer used to work - but now they look awful. I was thinking of digging them all up and starting over.
Tuesday, September 25, 2012 9:37 AM
Thank you for the suggestions. I have always wanted a peace rose and got one this year. It's beautiful blooms were 9" across! Then, it got chomped by japanese beetles, which I got rid of. Then, spots all over in the course of about two weeks. I tried the Bayer, but no luck. I am going to try the two remedies here.