22,795 Garden Web Discussions | Roses
I do know that this rose does not seem to do well everywhere. In my location, I know of no better white HT. My specimens have grown to around 5.5 feet high and across. The flowers are large (5 inches or better sometimes), have a high petal count, and are very fragrant. No significant disease problems.
At least here in my zone KOs can grown pretty big. I see them in flower beds here that are 6x5 but suspect they aren't pruned at all and if they are it is with hedge trimmers since they are shaped with some being boxy. My next door neighbor pruned hers down to about 24" tall in February and her bushes are now about 4x3'. Apparently it doesn't hurt them to prune them back that much if you want to keep them smaller
You mention when the nights turn cooler. That's the time to move them since you can't wait until dormancy. I'd take a radical approach. Cut them back to around 12" high, strip the leaves and then move them as soon as the nights turn cool. After you move them water them in well but no fertilizer. Particularly not nitrogen. As per Jack Falker's recommendation about 6 weeks before your first frost date give them a dose of potassium once a week.
This will give them a chance to set some roots beforehand. Hopefully you can dig up a decent rootball aka my video but this will still give the rose time to settle in. Come winter I'd mound the parts of the canes sticking out of the ground to within 2-3" of their tips. That should keep them healthy until you can plant them after the work is done.
I've gotten doubles from Chamblees also. Noticed them when the dirt fell off while planting them.They were tiny but have grown beautifully since planting separately.Nice of them thou since if one is weaker and doesn't make it. Chances are the other will grow fine.
I guess its difficult to keep track of large stocks of roses. K&M would not be the first to send out a mislabeled rose. LOL Oh well, it could be worse. But I do still want Christopher Marlowe, I'll see if they have it next season. I wish they would have a sale. Their roses are of excellent quality and I'd even say fair price, especially for what you get and on Fortuniana, but shipping is super expensive.
But to tell you the truth, its worth it. They carry a huge stock of Austins and besides Cool Roses here in Fl (which only has certain varieties and of limited stock) there really is no other source for Austins on Fortuniana.
Yesterday afternoon I walked a couple of streets looking at all the roses in the front yards of people and did not see anymore RRD but did see some probable herbicide damage that bears watching.
The HOA sent emails to the members and showed pictures of RRD damage and herbicide damage. It seems we have a couple of master gardners in the subdivision and the HOA has invited them to prepare a presentation for a community meeting.
The HOA is currently removing all KOs in common grounds and replacing them with native plants. It'll be sad to see the loss of all those beautiful blooms all spring and fall but RRD is such a major problem here they feel that is the only way they can arrest it.
Wish newscasts would help. We've had at least one recently, but the two heart shaped knock out rose planting at LoveField airport are severely infected and have been so for about 2 years. No blooms this year, just the ugly diseased foliage and they just keep shearing them back. Similar plantings across the street became diseased and were removed. Not sure what the delay is in ripping them out. Here, it's an epidemic.
There are not many rose gardeners around, we need all the help we can get. Some newscasts might help to educate public. Someone from my rose club has RRD landed on the wild roses on his property (about half acre of wide roses). He couldn't take care of them by himself, called county, but got no help from them. I tried to get him to call the TV stations.
OK. I will get some. Now how would it go into my spray rotation. I normally use Bayer once a month and Honor Guard once a month leaving a two week interval between the two.
I do have some that have had sick leaves for a long time, but I have a new Quietness that I noticed this morning is starting to get the tiny yellow triangle at the tip. It hasn't got the ugly brown part yet. Until you had posted that it was a fungus I thought it was probably insects, due to the fact I was already using two types of fungicides.
Thanks for the info. It is always appreciated.
I haven't noticed the chevron symptom on Quietness. Maybe it is something else.
Remember, I'm not giving you a firm diagnosis. That would need to come from a path lab. Actually insects (leafhoppers) cause the chevrons on some plants by damaging the midrib on the underside. I have looked for this bite damage on rose leaflets and not seen it. Also suggestive of fungus is it being confined to certain varieties, usually tending to be glossy-leaved and blackspot-resistant.
I think you could tank-mix Daconil with the conazole fungicide if the weather is not extremely hot. Both are chemically rather stable.
Ratdogs, I am looking back to this conversation with you- so your Purple Splash is cane hardy in Hew Hampshire? I hope it will be cane hardy here in Zone 6a!
Yes it has been cane hardy for me. Late growth on the tips will die back, and it's susceptible to breakage from the wind of course.
I am zone 5b. I used to be zone 5a on the "old" map. Lately I'd been wondering climate change had bumped me into 6 because I'd had such good luck for so many years, but last winter shattered my delusions of growing zone 6 roses. Purple Splash was fine.