Treat Soil When Replacing Sickly Rose W/ New Rose?

14 years ago

My Cornelia (about 8/9 years old) has been losing vigor the 3 last years or so, with the new foliage always looking wilted (although not twisted nor distorted). This year it has just about stopped blooming, so I have decided to replace it this fall. The other roses in the immediate area are Penelope, Cramoisi Superieur, Buff Beauty and Graham Thomas. Thankfully, all of them are healthy so Cornelia's problem has not affected any of the other roses. Since I don't know why Cornelia is languishing, I think it may be a good idea to treat the soil before I plant another rose, but what should I use and how long should I wait to put in the new rose in her spot?

Thanks,

Molly

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Comments (6)

michaelg
14 years ago
You can't treat an unknown malady, unless by replacing the soil. Maybe you'll learn something upon digging it up, say a mole's burrow or nematode damage to the roots.
jardineratx
Original Author
14 years ago
I'm afraid you are right, Michael. I have no idea what the problem is, so I think I will dig up Cornelia, wait a couple of months, then replace the soil when I plant the replacement rose.
thanks,
Molly
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Perhaps incorrect but here is another. Gall can also enter thru the roots. Even if you never once dug within a roses root zone there will always be the underground insects ie. grubs wireworms among others that feed on roots. Most of us have nerver been so lucky to have placed our roses in the correct spot every time we plant. Sorry bart as that had nothing to do with your question. If we were able to have access to Galtrol we would be able to treat our plants before planting and when moving. Gall is a garden nightmare in a way. I'm not too bright when it comes to things like this but it seems as if the higher prices rise the less people purchase. Drop the prices to something doable and few in the nursery business would wish to deal with gall problems. Just a dumb thought. I did a bit of an experiment here in an area of my garden known to have had gall issues. Many years ago I removed all roses from this spot as several roses had become galled. For years only grew other plants here and they did well. The ground there had been dramatically improved. This is the sunniest spot in my yard and I needed it for roses. Three years ago I took the plunge and planted 7 Flower Carpets to see what would happen. I was not careful with the roses. they all received wounds right below the surface. I dug those out this year. Removed all the soil and carefully examined them. No gall was present. I'm now replanting this area in the coming spring. What did my little experiment tell me? Nothing really but I'm planting there now and hoping for the best.
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Embothrium
14 years ago
Maybe Texas Cooperative Extension can help you identify the problem.
cemeteryrose
14 years ago
I always examine the roots when a plant doesn't look good. You can take a sample of anything suspicious to your cooperative extension office, I would think. Contact them to be sure, and find out what sort of sample they want.

Things we've found in the cemetery garden have included crown gall, excessive moisture, and fungal rot.
Anita
jardineratx
Original Author
14 years ago
I have taken a photo of the new wilted growth on Cornelia. This type of wilt appears regardless of watering or temperature variations. I included a photo of the canes, which are all grey and brittle. I don't prune this rose very much since it doesn't bounce back very. Maybe the canes are old and should be cut back really hard?
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Molly
dublinbay z6 (KS)
14 years ago
jardineratx,
If you want to try and save it, you might indeed trim a couple of the oldest looking canes all the way to the ground. Hopefully, that will force the place to produce some new canes. The following year, you can trim a couple more old canes to the ground, and the third year a couple more old canes to the ground. By that time you should have a nearly "new" plant, vigorously blooming.

If it is any encouragement, I had a fairly old Buff Beauty that wasn't blooming as abundantly as in past years. A big branch from my neighbor's oak tree broke off in a storm and landed SPLAT! right in the middle of BB. There was so much serious damage that I had no choice but to cut most of BB to the ground. I crossed my fingers and waited to see what would happen. Lots of healthy new canes is what happened, and BB and I have been very happy ever since. : )

Kate

Treat Soil When Replacing Sickly Rose W/ New Rose?

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Treat Soil When Replacing Sickly Rose W/ New Rose?

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