-
Rosebud
black spots on roses
What can I do for the black spots on roses ?
-
The Helpful Gardener
- Mod
- Posts: 7491
- Joined: Mon Feb 09, 2004 9:17 pm
- Location: Colchester, CT
-
The Helpful Gardener
- Mod
- Posts: 7491
- Joined: Mon Feb 09, 2004 9:17 pm
- Location: Colchester, CT
-
The Helpful Gardener
- Mod
- Posts: 7491
- Joined: Mon Feb 09, 2004 9:17 pm
- Location: Colchester, CT
-
Guest
Two givens with rose growing: They require specific care and with roses you get black spot ( :evil: )
Provide roses with the "Big Three" - All day direct sun, weekly watering with a soaker hose and an organic feeding schedule. Also, provide space between roses for good air circulation and mulch the bed. When basis needs are met, roses tend to be less prone to disease and pests.
That being said, you can have the healthiest roses on the block, but if a neighbor does not and they has roses with black spot, so to will you. Black spot travels by wind and raindrops.
A preventative solution is to observe roses on a daily basis. Black spot will always start on a lower leaf. If you see an infected leaf don't just say "Oh no, black spot " and walk away. Get a pruner and remove that leaf and its stem. Put the diseased parts in the the trash, don't toss them on the ground under the bush. Then disinfect pruner blades with a spritz of alcohol. I keep a small mister bottle of alcohol and small paper towel squares in my garden caddy, which I have at my side whenever I'm outdoors.
I am not a fan of systemic products since they are fatal to earthworms and other beneficials and, as I have a dog that has to share an enclosed yard with the roses I avoid any chemical powders or sprays.
Provide roses with the "Big Three" - All day direct sun, weekly watering with a soaker hose and an organic feeding schedule. Also, provide space between roses for good air circulation and mulch the bed. When basis needs are met, roses tend to be less prone to disease and pests.
That being said, you can have the healthiest roses on the block, but if a neighbor does not and they has roses with black spot, so to will you. Black spot travels by wind and raindrops.
A preventative solution is to observe roses on a daily basis. Black spot will always start on a lower leaf. If you see an infected leaf don't just say "Oh no, black spot " and walk away. Get a pruner and remove that leaf and its stem. Put the diseased parts in the the trash, don't toss them on the ground under the bush. Then disinfect pruner blades with a spritz of alcohol. I keep a small mister bottle of alcohol and small paper towel squares in my garden caddy, which I have at my side whenever I'm outdoors.
I am not a fan of systemic products since they are fatal to earthworms and other beneficials and, as I have a dog that has to share an enclosed yard with the roses I avoid any chemical powders or sprays.
-
The Helpful Gardener
- Mod
- Posts: 7491
- Joined: Mon Feb 09, 2004 9:17 pm
- Location: Colchester, CT