22,153 Garden Web Discussions | Roses
Hmm. Glad to hear that it hasn't reverted to something else. These are new basals, and I didn't want to have to cut them off. It's been getting plenty of water from a drip hose until about a week ago when it started freezing. So it's not too hot, although I may have let it dry out recently.
Henry,
Do a scientific search for the papers by Kaminska et al. who have written very, very much about the phytoplasmas in Europe and be sure to see the paper about rose disease in a greenhouse in Poland . Of the Kaminska papers I was able to download, all found phytoplasmas and none reported finding any viruses.
There are also two papers about some sick roses in a bed in China that the authors tied to Pawlonia phytoplasma in a tree adjacent to the infected rose garden.
Ann
Ann I am familar with the rose phytoplasmas litererature including the Chinese (and including the 2010 U.S. paper which I posted in this forum).
http://forums2.gardenweb.com/forums/load/roses/msg0421561629709.html
I started the present thread for information purposes. Someone is still claiming that rose rosette virus is not a virus but a phytoplasma.
Here is a link that might be useful: link to earlier thread that reported that RRD was a phytoplasma.
We have both Katydids and Grasshoppers. Some years worse then others. For me Grasshoppers are far worse then Katydids, but then our Grasshoppers can get very big and have an enormous appetite. Mostly what I see Katydids doing is sitting on a rose. Mostly what I see Grasshoppers doing is eating a rose. I leave Katydids alone just because they don't do much damage that I can tell.....Maryl
Gee I thought Katydids was just another name for grasshoppers...
I have no doubt this Katydid ate some of the rose bloom.
But I see no other damage anywhere else.
So far they have not been much of a problem here either.
Hope it stays that way...lol
This post was edited by jim1961 on Thu, Oct 17, 13 at 22:11
I never encountered mildew until we moved to Pasadena and then I discovered that it is the biggest problem here. I thought it would go away after June but it didn't and some roses that were particularly susceptible were literally shriveling up they had it so bad. So I decided to spray with potassium bicarbonate and it does work. It wont help destroyed growth but new growth will be protected. As far as I can tell it is organic and hasn't hurt any bees or other insects. The product is GreenCure fungicide and it is available widely but it is expensive.
Some roses are like that -- at some times of the year, they get a touch of mildew. No biggie.
Some roses have NO resistance, and mildew at the drop of a hat. And the problem is far worse in some areas than in others.
Actually, if you are (like Henry) in an area with fairly high mildew pressure, you have two basic choices . . .
1. Spray regularly.
2. Keep roses that don't mildew.
Our option is 2.
Why mess with roses that frustrate you? Prune 'em with a shovel, and discover a rose that doesn't have that problem.
Jeri
Take a look at this thead on best white landscape roses:
http://forums2.gardenweb.com/forums/load/roses/msg0510051230536.html
For taller Perennial plants, try Lavender Provence or Grosso. They are almost evergreen in my zone 6b climate. I also grow 8 other varieties, but these two are the tallest . For most of these varities, I get a decent second flush (going on now) if I cut the flowers early enough in the season, but not so much for these two.
There is "white out" which is not a knockout rose but is bred by the same person Bill Radler...
Sunny Knockout starts out yellow but quickly fades to white...
Here is a link that might be useful: White Out Rose
Picked up 12 roses from Steve & his kind wife Kim today. Had a hard time choosing, my wonderful husband who came along for transport kept me focused! Thanks Steve and Kim, made for a great birthday for me today!
Strawberry, would have been neat to see another Gardenwebber there!
I have a bunch of rose slugs this time of year. I'm hoping the birds notice them. I may do a bit of spinosad on some roses that are crazy with them to bump down the population a notch, but I may wait till the spring hatch since frost is coming.
Jim, that's an awesome picture! I saw a wasp carry away a curled rose slug. He just flew off with it (I didn't notice him before he was flying, so I didn't see a sting). Pretty cool :)
Back in the day, breeders would name roses after noble persons (with permission) in order to attach some of that person's social prestige to the rose. But wealthy non-noble persons would pay breeders to name roses after themselves, perhaps as a way of competing for prestige. Several of the most famous OGR are named after banker's wives.
I like the Austin names where he uses a phrase from a literary text with the character's name: Pretty Jessica, Admired Miranda. But one of those has an unfortunate context: "Young Lycidas is dead, dead ere his prime."
Yes, Young Lycidas, Milton's elegy on a dead youth. I'd forgotten about my Milton studies in college until this rose popped up. I just hope my Young Lycidas doesn't die in his youth. What an odd name for a rose. Diane
If there is a sewage smell to the rotting roots and the soil, this is anaerobic decay caused by poor drainage and overwatering. Manure and rotting wood do not smell like sewage if oxygen is present. So the prime question would be whether that nasty sour smell is present below the soil surface.
Ordinary canker does not normally, if ever, spread wildly through the stems and roots. Roses are able to defend themselves against canker and wall it off. (A partial exception might occur during winter dormancy when mild, wet weather allows the fungus to be more active than the plant's immune system.)
It is possible that your roses have something like phytopthera, but I would look first at the soil conditions. 50% manure is way too much. The muck would fill all the spaces between the sand grains and, if regularly watered, remain saturated with water. That much manure might also create a toxic excess of salts, and particularly if you have been fertilizing.
Use either a standard American potting mix such as Miracle Gro, or a light sandy loam containing about 80% large particles (sand or other gritty material, bark fines, coir). There is good advice on the Container Forum.
Since coming to southern California I've seen a lot of dead roses. Most of my neighbor's roses look this way. I would attribute it to lack of proper care. The soil here can be totally dry and rock hard. Most people don't mulch or water correctly. Aerial watering runs off or if it is trapped it just sits there because there is no drainage and the rose can rot. You really have to build up the soil and get proper drainage and once you do you have to feed and water heavily especially when it stays hot and dry for long periods. And BTW, old woody canes with no basals are common here. It is a matter of time before roses like this die.
Mine has more defined pink ? The plant seems bushier and less ht form. I think my blossoms had a bit of ruffle to them and a tinge of green on the outer petals. Didn't take a pic. She is is on year two from palatine...I think.
Yours is lovely, Beth .
Michael, thanks for the tips. Seems that the more I research some things the more confused I become.
Cynthia, your post was absolutely not confusing but completely the opposite. I just think I researched things a bit too much and found so many varying practices that I lost confidence in what I was going to do. I appreciate the additional advice.
I would rather them in the ground as I am known for neglecting things but think I am going to stick with my original plan. That is building a small enclosure in an insulated (unheated) room in my shop and thermostatically control it to not get colder than -15C. Fortunately I am a tradesman and contractor so have everything but the thermostat. If anyone would like directions or a pictorial please let me know.
Again I appreciate all the advice. The folks here are the best.
SCG
A Knock Out isn't a rose I'd give "infant slack" time too! They are bred to be high performing right out of the box and if they aren't I can't imagine it would be any reason other than it doesn't like the spot it's planted in or it is a "lemon" specimen. Both reason would have mine gone and/or moved pretty quickly. (Says the woman who yanked one out last week!)
I totally get being patient with a something not bred to be so vigerous, but KO's are not a "1st year sleep, 2nd year creep, 3rd year leap" kind of variety!
Re shade: back when the Chihuly exhibit was at the Atlanta Botanical Garden, some of us got together to see the roses and his glass. In back of my favourite pond with some very subtle glass colors, Jody and I saw a rose blooming not in the rose garden. So, of course, we had to go see.
The rose was taller than either of us (not that hard for most roses) and wasn't heavily leaved out, but it was blooming self supported in dappled sunlight. J sought out the label at the bottom and it was Knock Out. It didn't look like all the other KOs we had seen, but was adapting well to good soil, dappled sunlight and benign neglect.