Home |
Search |
Today's Posts |
#1
|
|||
|
|||
Roses losing leaves
I got a few very old rose-bushes in my garden. As in most years,the
roses had bloomed gorgeously, now for the second time. What has been worrying me for a few weeks now is that the bushes have been massively losing their lower leaves; they turn a dirty brown and fall off. I couldn't detect any bugs or mildew. What other desease could have befallen them? Thanks for advice. Yoyo |
#2
|
|||
|
|||
wrote in message
ups.com... I got a few very old rose-bushes in my garden. As in most years,the roses had bloomed gorgeously, now for the second time. What has been worrying me for a few weeks now is that the bushes have been massively losing their lower leaves; they turn a dirty brown and fall off. I couldn't detect any bugs or mildew. What other desease could have befallen them? Thanks for advice. Yoyo Where are you? I"m guessing Germany but that doesn't tell me much about what your temperatures and rain have been like. Where I am (near San Antonio TX USA Zone 8) we've had high heat, low rain all summer. I've lost several roses whose leaves just turned brown. They were probably weak from other diseases (unknown) since other roses in the same beds are fine. Of course, too *much* rain can have the same effect if for some reason the soil isn't draining properly. Are there trees nearby? Perhaps tree roots are interfering with the rose roots. Trees will win every time. If all your roses are having this problem, it could be a problem with the soil. Do you have a local nursery that can do a soil test for you? A good site for disease/pest identification is Baldo's: http://members.tripod.com/buggyrose/ Gail |
#3
|
|||
|
|||
Hi, Gail,
you're right: I am in Germany. We had plenty of rain in early August, but very dry weather ever since. There is a huge old weeping willow nearby, but the rose-bushes are just as old and there has been peaceful coexistence all the time. I think you are right about having the soil tested. We'll see. Thanks for your advice. Joachim Gail Futoran schrieb: wrote in message ups.com... I got a few very old rose-bushes in my garden. As in most years,the roses had bloomed gorgeously, now for the second time. What has been worrying me for a few weeks now is that the bushes have been massively losing their lower leaves; they turn a dirty brown and fall off. I couldn't detect any bugs or mildew. What other desease could have befallen them? Thanks for advice. Yoyo Where are you? I"m guessing Germany but that doesn't tell me much about what your temperatures and rain have been like. Where I am (near San Antonio TX USA Zone 8) we've had high heat, low rain all summer. I've lost several roses whose leaves just turned brown. They were probably weak from other diseases (unknown) since other roses in the same beds are fine. Of course, too *much* rain can have the same effect if for some reason the soil isn't draining properly. Are there trees nearby? Perhaps tree roots are interfering with the rose roots. Trees will win every time. If all your roses are having this problem, it could be a problem with the soil. Do you have a local nursery that can do a soil test for you? A good site for disease/pest identification is Baldo's: http://members.tripod.com/buggyrose/ Gail |
#4
|
|||
|
|||
Hi,
I live in IL and this is my first time having rose bushes. I have one rose bush that dropped all it's leaves so I thought it was dead. I was watering all of the bushes yesterday and noticed that one stem has new leave coming out. One of the other bushes seems to be doing well but the leaves on one branch have dried up and curled up but the rest of the bush is doing well. Any advice from anyone would be appricated. I should mention that they did have the black spots on the leaves but I've been spraying them and also, there are moles diging in the bed and small ants. Could this all be the problem? Kim |
#5
|
|||
|
|||
"Kim" wrote in message
.. . Hi, I live in IL and this is my first time having rose bushes. I have one rose bush that dropped all it's leaves so I thought it was dead. I was watering all of the bushes yesterday and noticed that one stem has new leave coming out. One of the other bushes seems to be doing well but the leaves on one branch have dried up and curled up but the rest of the bush is doing well. Any advice from anyone would be appricated. I should mention that they did have the black spots on the leaves but I've been spraying them and also, there are moles diging in the bed and small ants. Could this all be the problem? Kim Anything that disturbs the rose roots could be a problem for the shrub. You probably should treat for the pests. I don't have moles but I do treat fire ant mounds on a regular basis. Leaves drying out often means the shrub isn't getting enough water. It's been really hot in some parts of the USA. If you follow the usual advice ("water deeply once per week") you're asking to lose roses! (Been there done that...) I have been known to water every other day when it was really hot, dry and windy, especially my raised beds which dry out faster. This summer I've watered the rose beds deeply twice per week almost every week (obviously not when we've gotten a good rainfall). It's appropriate to prune the dead canes if you're sure they're dead. New canes on some roses are red and turn green later on. But if the cane is brown and brittle, that's dead. Cut it back as far as necessary and dab a bit of white glue (Elmers or school glue) on the cut to deter insects. (Usual rule is IIRC the thickness of a pencil; anything smaller than that don't bother with the glue.) You can prune dead canes at any time. Most roses have some blackspot and if the rose is otherwise doing ok, I wouldn't bother spraying too much. Sometimes the "cure" is worse than the disease. I try to take a minimalist approach and gradually add cures to see what works and what doesn't. A good site for all kinds of diseases and pests of roses is Baldo's: http://members.tripod.com/buggyrose/ I'm also rather fond of the Ortho and Sunset series on roses that can be found at bookstores as well as places like Home Depot and Lowes. Good text, good clear photos, and rather cheap for what you're getting (around $15). Gail near San Antonio TX Zone 8 |
#6
|
|||
|
|||
Gail Futoran wrote:
"Kim" wrote in message .. . Hi, I live in IL and this is my first time having rose bushes. I have one rose bush that dropped all it's leaves so I thought it was dead. I was watering all of the bushes yesterday and noticed that one stem has new leave coming out. One of the other bushes seems to be doing well but the leaves on one branch have dried up and curled up but the rest of the bush is doing well. Any advice from anyone would be appricated. I should mention that they did have the black spots on the leaves but I've been spraying them and also, there are moles diging in the bed and small ants. Could this all be the problem? Kim Anything that disturbs the rose roots could be a problem for the shrub. You probably should treat for the pests. I don't have moles but I do treat fire ant mounds on a regular basis. Leaves drying out often means the shrub isn't getting enough water. It's been really hot in some parts of the USA. If you follow the usual advice ("water deeply once per week") you're asking to lose roses! (Been there done that...) I have been known to water every other day when it was really hot, dry and windy, especially my raised beds which dry out faster. This summer I've watered the rose beds deeply twice per week almost every week (obviously not when we've gotten a good rainfall). It's appropriate to prune the dead canes if you're sure they're dead. New canes on some roses are red and turn green later on. But if the cane is brown and brittle, that's dead. Cut it back as far as necessary and dab a bit of white glue (Elmers or school glue) on the cut to deter insects. (Usual rule is IIRC the thickness of a pencil; anything smaller than that don't bother with the glue.) You can prune dead canes at any time. Most roses have some blackspot and if the rose is otherwise doing ok, I wouldn't bother spraying too much. Sometimes the "cure" is worse than the disease. I try to take a minimalist approach and gradually add cures to see what works and what doesn't. A good site for all kinds of diseases and pests of roses is Baldo's: http://members.tripod.com/buggyrose/ I'm also rather fond of the Ortho and Sunset series on roses that can be found at bookstores as well as places like Home Depot and Lowes. Good text, good clear photos, and rather cheap for what you're getting (around $15). Gail near San Antonio TX Zone 8 Thanks Gail for all the great advice! |
#7
|
|||
|
|||
"Kim" wrote in message
. .. [snip] Thanks Gail for all the great advice! You're welcome, and good luck. Gail |
#8
|
|||
|
|||
On Thu, 15 Sep 2005 15:52:18 GMT, Kim
wrote: Hi, I live in IL and this is my first time having rose bushes. I have one rose bush that dropped all it's leaves so I thought it was dead. I was watering all of the bushes yesterday and noticed that one stem has new leave coming out. One of the other bushes seems to be doing well but the leaves on one branch have dried up and curled up but the rest of the bush is doing well. Any advice from anyone would be appricated. I should mention that they did have the black spots on the leaves but I've been spraying them and also, there are moles diging in the bed and small ants. Could this all be the problem? Black spots on the leaves can be from several different sources, but the main cause is the aptly-named "Black Spot", which causes the leaves to fall off. Usually you see a small black spot that starts to get bigger, or multiply and then the leaf starts turning an autumnal shade of yellow (even if it's in May). The leaf then falls off. Once Black Spot (the specific disease, not the symptom) hits a leaf, it's toast. Doesn't matter if you spray and spray and spray. The only thing you can do is prevent, not cure, at least at leaf level. The thing is, this is spore-driven infection and the spores stay on the leaves, even through the winter. You need to collect all of the leaves off of the ground and dispose of them in a sealed plastic bag. Another source of defoliation is Japanese beetles. It's not so much that they eat the leaves, which they sometimes do when they've obliterated all of the blooms. It's more of a stress to the plant in general. Some of my roses that were beset by the little buggers dropped almost all of their leaves in July and August. They are just now starting to come back with new canes starting and new leaves coming in. If you have a single branch that has turned brown, you can prune it back at anytime. Prune back until you find white in the center of the stem. It's no big worry if you have to prune a dead branch completely if the rest of the bush is fine. Moles can certainly be a problem for the ultimate health of the plant (after all, they disturb the root ball in some pretty drastic ways). I'm not sure if ants are a big problem. The man thing is to put a leaf into a baggie and take it to your local garden center. They can tell you if it's black spot or some other fungal, viral or bacterial infection. |
#9
|
|||
|
|||
dave weil wrote:
On Thu, 15 Sep 2005 15:52:18 GMT, Kim wrote: Hi, I live in IL and this is my first time having rose bushes. I have one rose bush that dropped all it's leaves so I thought it was dead. I was watering all of the bushes yesterday and noticed that one stem has new leave coming out. One of the other bushes seems to be doing well but the leaves on one branch have dried up and curled up but the rest of the bush is doing well. Any advice from anyone would be appricated. I should mention that they did have the black spots on the leaves but I've been spraying them and also, there are moles diging in the bed and small ants. Could this all be the problem? Black spots on the leaves can be from several different sources, but the main cause is the aptly-named "Black Spot", which causes the leaves to fall off. Usually you see a small black spot that starts to get bigger, or multiply and then the leaf starts turning an autumnal shade of yellow (even if it's in May). The leaf then falls off. Once Black Spot (the specific disease, not the symptom) hits a leaf, it's toast. Doesn't matter if you spray and spray and spray. The only thing you can do is prevent, not cure, at least at leaf level. The thing is, this is spore-driven infection and the spores stay on the leaves, even through the winter. You need to collect all of the leaves off of the ground and dispose of them in a sealed plastic bag. Another source of defoliation is Japanese beetles. It's not so much that they eat the leaves, which they sometimes do when they've obliterated all of the blooms. It's more of a stress to the plant in general. Some of my roses that were beset by the little buggers dropped almost all of their leaves in July and August. They are just now starting to come back with new canes starting and new leaves coming in. If you have a single branch that has turned brown, you can prune it back at anytime. Prune back until you find white in the center of the stem. It's no big worry if you have to prune a dead branch completely if the rest of the bush is fine. Moles can certainly be a problem for the ultimate health of the plant (after all, they disturb the root ball in some pretty drastic ways). I'm not sure if ants are a big problem. The man thing is to put a leaf into a baggie and take it to your local garden center. They can tell you if it's black spot or some other fungal, viral or bacterial infection. Thank you Dave for all that info. I'm pretty sure it's the black spot thing. The bad thing is, one plant has lost all leaves and only has two green branches left. One has new leaves coming in and the other looks like it may have some starting. The rest of the plant is the larger stalks and that's what I didn't really know if I should cut back. Another thought I had was to totally transplant them somewhere else because they are under the eves of the house and I would like for them to get rain. I can't really avoid the moles because they are all over our yard. Do you think that I can transplant even if I just planted them last spring or would that be too stressful on them to move them so soon. I think I'm going to buy a book about roses, they have a good one at Home Depot that I was looking at. Kim |
#10
|
|||
|
|||
"Kim" wrote in message
... [snip] I can't really avoid the moles because they are all over our yard. I have a vague memory of using chicken wire to keep out moles. You'd have to do some research but I think the concept is to line the planting hole with chicken wire. The moles can't get in, roots will eventually grow outside the chicken wire but probably enough will survive to keep the plant alive. Anyway, it's something worth checking on. Do you think that I can transplant even if I just planted them last spring or would that be too stressful on them to move them so soon. I think I'm going to buy a book about roses, they have a good one at Home Depot that I was looking at. Kim I'll defer to Dave on the transplanting, but I think you have to choose between losing them to moles or "fixing" the holes now. If you do that you might as well transplant. But I'd be concerned about the heat. If you do transplant I'd do it in one move. Prepare the new hole(s), dig up the plant(s) with as much of the root ball as possible, move immediately to the new hole. If you can get it, use some horticultural seaweed. It's a great natural root stimulator. I've found it in D.C. (when helping a friend with her first rose) so you might be able to find it in VA. Gail |
#11
|
|||
|
|||
Gail Futoran wrote:
"Kim" wrote in message ... [snip] I can't really avoid the moles because they are all over our yard. I have a vague memory of using chicken wire to keep out moles. You'd have to do some research but I think the concept is to line the planting hole with chicken wire. The moles can't get in, roots will eventually grow outside the chicken wire but probably enough will survive to keep the plant alive. Anyway, it's something worth checking on. Do you think that I can transplant even if I just planted them last spring or would that be too stressful on them to move them so soon. I think I'm going to buy a book about roses, they have a good one at Home Depot that I was looking at. Kim I'll defer to Dave on the transplanting, but I think you have to choose between losing them to moles or "fixing" the holes now. If you do that you might as well transplant. But I'd be concerned about the heat. If you do transplant I'd do it in one move. Prepare the new hole(s), dig up the plant(s) with as much of the root ball as possible, move immediately to the new hole. If you can get it, use some horticultural seaweed. It's a great natural root stimulator. I've found it in D.C. (when helping a friend with her first rose) so you might be able to find it in VA. Gail Thanks Gail, that's a good idea with the chicken wire. I live in IL so I'm not sure where I would find the seaweed. I'm sure one of our florist would know. Thanks for all you suggestions. Kim |
#12
|
|||
|
|||
On Sat, 17 Sep 2005 02:20:47 GMT, "Gail Futoran"
wrote: "Kim" wrote in message m... [snip] I can't really avoid the moles because they are all over our yard. I have a vague memory of using chicken wire to keep out moles. You'd have to do some research but I think the concept is to line the planting hole with chicken wire. The moles can't get in, roots will eventually grow outside the chicken wire but probably enough will survive to keep the plant alive. Anyway, it's something worth checking on. Do you think that I can transplant even if I just planted them last spring or would that be too stressful on them to move them so soon. I think I'm going to buy a book about roses, they have a good one at Home Depot that I was looking at. Kim I'll defer to Dave on the transplanting, but I think you have to choose between losing them to moles or "fixing" the holes now. If you do that you might as well transplant. But I'd be concerned about the heat. If you do transplant I'd do it in one move. Prepare the new hole(s), dig up the plant(s) with as much of the root ball as possible, move immediately to the new hole. If you can get it, use some horticultural seaweed. It's a great natural root stimulator. I've found it in D.C. (when helping a friend with her first rose) so you might be able to find it in VA. Gail Personally, I'd probably wait until they go dormant but before the ground freezes solid. Up there, that would probably be somewhere around the middle of November. Problem is, if the moles are all over the yard, I'm not sure if transplanting wil do the trick. I'd find out how to get rid of the moles. There are traps and the like that can do the trick. |
#13
|
|||
|
|||
"Kim" wrote in message
... [snip] Thanks Gail, that's a good idea with the chicken wire. I live in IL so I'm not sure where I would find the seaweed. I'm sure one of our florist would know. Thanks for all you suggestions. Kim Oops, sorry. I was mixing you up with another poster who lives in VA. Seaweed is not so uncommon a product so it's worth checking around for it. I would start with nurseries, especially if there are any locally that carry organic products. Gail |
#14
|
|||
|
|||
I reside in IL and this is my aboriginal time accepting rose bushes. I accept one rose backcountry that alone all it's leaves so I anticipation it was dead. I was watering all of the bushes bygone and noticed that one axis has new leave advancing out. One of the added bushes seems to be accomplishing able-bodied but the leaves on one annex accept broiled up and coiled up but the blow of the bush is accomplishing well.
__________________
Grow tents |
Reply |
Thread Tools | Search this Thread |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Forum | |||
Live Oak Losing Leaves | Texas | |||
Live Oak Losing Leaves | Texas | |||
Live Oak Losing Leaves | Texas | |||
Live Oak Losing Leaves | Texas | |||
Roses losing all their leaves | Gardening |