22,151 Garden Web Discussions | Roses

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michaelg(7a NC Mts)

KO is susceptible to cercospora disease, which is sort of like blackspot but takes longer to kill the leaves. The spots could be that or spot anthracnose disease. (I don't know whether KO is susceptible to that one.) When my neighbor's KO gets spotty, she just cuts it back and removes the bad foliage. It recovers and blooms nicely in about six weeks. Or you could spray with a copper fungicide such as Soap Shield, which is considered organic. This would stop the spread of the disease.

Your foliage is chlorotic (yellowish), which may account for the bright redness of the fungal spots. It is not making enough chlorophyll, and a likely cause is that it needs nitrogen. As a quick booster, you could apply 3 TB of blood meal or 1 TB of regular lawn fertilizer (approx. 30-0-0, no herbicide). I can recommend Rose Tone as a regular fertilizer, one cup every two months.

This post was edited by michaelg on Thu, Jun 27, 13 at 16:47

    Bookmark     June 27, 2013 at 4:40PM
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mad_gallica(zone 5 - eastern New York)

Carefully examine around the bottom of the canes. Knock Out is *very* susceptible to cane cankers which damage the whole cane and make it more susceptible to everything known to rosedom. If the cane is damaged, that would explain the chlorosis, and the leaf problems. If there is any mulch over the base of the plant, remove it. That's going to be the problem.

    Bookmark     June 27, 2013 at 6:24PM
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hoovb zone 9 sunset 23

I moved all mine when they came with us to the new house. We potted them up and keep them in full shade until fall then planted them in the ground.

    Bookmark     June 27, 2013 at 12:59PM
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seil zone 6b MI

Yes, you can take your roses with you. I know of many people that have moved they're roses anywhere from a few blocks away to across the country. We need to know some particulars on the move. When are you moving and how far? How many roses are we talking about?

    Bookmark     June 27, 2013 at 6:21PM
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ratdogheads(5b NH)

Here is a rambler to be preserved - America (Walsh, not J&P). This still available and is sold nowhere else.

It was in bloom upon arrival and it was such a surprise and delight. I had been uncertain when I bought it because there are few clear photos of this rose online. But wow, was I thrilled at my choice.

I took this picture which doesn't do it justice. Then the next few days it rained and I never got a chance at a better picture before it lost the petals. I wish I could show everyone how really special it is. I stuck it straight in the ground and it's growing like a weed, waist high at least.

    Bookmark     June 27, 2013 at 4:51PM
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catspa_NoCA_Z9_Sunset14

Very nice rambler, ratdogheads. One that I got just recently and still listed as available is 'Mary Lovett' -- perfect quite double creamy white flowers, nice scent, excellent foliage. Even more unusual for a rambler, it's listed as "fair" rebloom. In fact, my band of it bloomed a day or two after I got it about a month and a half ago and now has a half-dozen buds and is set to bloom again. Vintage sole source, it seems, in U.S. (another nursery listed, but it looks defunct).

I got the "Marlowe's Soft Orange", too, Cynthia, but no blooms yet, so glad to hear the good report.

    Bookmark     June 27, 2013 at 5:26PM
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nickl(Z7a NJ)

Jeri:

You have to understand what this notice means. ALL pesticides have to follow specific EPA regulations - no exceptions.

This notice means that a particular manufacturer has voluntarily decided they don't want to comply with the specific EPA regulations. By itself, it doesn't mean anything for or against that particular pesticide and/or the active ingredient

Many of those on the list are simply there for economic reasons, The manufacturer is not making enough money on its version of the product and doesn't want to go though the expense of compliance.

It also may be that other manufacturers produce the same product.

For example: You'll notice that Clorox cleaner (active ingredient- sodium hypochlorite) is on the list. I fully expect that you will able to continue to buy laundry bleach (active ingredient- sodium hypochlorite) after January 2014 ;-)

This is a different situation from when the EPA ITSELF issues a notice that they are cancelling the registration on a product and/or an active ingredient.

This post was edited by nickl on Thu, Jun 27, 13 at 9:01

    Bookmark     June 27, 2013 at 9:00AM
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henry_kuska

nicki stated: "This is a different situation from when the EPA ITSELF issues a notice that they are cancelling the registration on a product and/or an active ingredient."

H.Kuska comment. Please notice the following from a 2006 government document: "EPA officials say the actâÂÂs legal standards for demonstrating unreasonable risk are so high that they have generally discouraged EPA from using its authorities to ban or restrict the manufacture or use of existing chemicals. Since Congress enacted TSCA in 1976, EPA has issued regulations to ban or limit the production of only five existing chemicals or groups of chemicals."

-----------------------------------------------

nickl, of course your original statement is formally correct that the manufacturer may have decided to cancel on its own. However, it is my impression that the EPA often/always? gives a manufacture with a problem chemical the chance to not reapply (sort of to save face), and as stated above in the testimony quote rarely has utilized the second option.

Thus, the general public cannot say why a product is not reregistered.

Here is a link that might be useful: Actions Are Needed to Improve the Effectiveness of EPAâs Chemical Review Program

    Bookmark     June 27, 2013 at 4:16PM
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nickl(Z7a NJ)

jeri:

Do you have a reference to black spot infestation being observed on Knock Out roses? We have been growing the original Knock Out essentially since it was first released and at most have seen only a few insignificant spots on the foliage - nothing that I would call an actual BS infestation.

The same is true of our other roses in the same family, although of course we haven't been growing them nearly as long.

This is an area of high disease pressure for BS, so if it was going to happen anywhere, I would expect to see it here.

The Knock Outs do get mildew - in fact, they seem to be quite susceptible to it. At least two of the growers who called me last year to check out the "black spot" on their Knock Out roses actually had mildew. .So I'm assuming others had it, too.

    Bookmark     June 27, 2013 at 2:36PM
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michaelg(7a NC Mts)

KO is susceptible to cercospora disease, and most people can't tell that from blackspot. I've seen it make KOs look pretty bad. I have never seen a significant BS outbreak on KO. You might find a spot on a senile leaf here and there.

    Bookmark     June 27, 2013 at 3:04PM
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darknightarfin

my co-worker's mother makes $70 hourly on the laptop. She has been without a job for seven months but last month her income was $12724 just working on the laptop for a few hours. Read more on this site http://bit.ly/19FdhC3

    Bookmark     June 27, 2013 at 1:52PM
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meredith_e Z7b, Piedmont of NC, 1000' elevation

I don't pull off spotty (from BS) leaves. If they are yellow and fall off to the touch, I knock those off, but I figure that green leaves are still working for the plant. There is enough BS in my garden that I don't think culling spotty leaves will help regarding risk of infection.

I have a lot of roses that do well but have various levels of spotty foliage. The infection only goes so far sometimes, apparently (just an observation, not something I've researched).

I definitely have a few roses whose foliage yellows and actually drops, so I'm familiar with that, but it might not happen to all spotty leaves, depending on your conditions compared to mine, etc, of course :) MIP has pretty new leaves at the moment, after dropping every leaf she had this year.

I do cut out ugly parts of canes if they look to have anything more than BS on them. But we get cankers/die back so easily in spring that I just don't risk anything weird cane-spreading. I don't cut green canes with BS spots, but if they are going yellow from it, I cut below the yellow. Yellowing canes are usually toast sooner or later, in my experience.

    Bookmark     June 27, 2013 at 1:29AM
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michaelg(7a NC Mts)

Susan, mildew on your other plants is a different species that does not affect roses, nor does rose mildew affect them.

The rose species affects apples, but apparently they are different races that rarely cross-infect.

    Bookmark     June 27, 2013 at 11:14AM
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jim1961 Zone 6a Central Pa.

Yes our cats are siblings... (sisters)
We got them when they were tiny kittens...
We taught them when they were kittens to stay within our fenced in backyard area and they always have so far after 9 years.
Even with rabbits in the neighbors yards they do not try to leave...
The cat on the left is lacy who loves to catch little critters...
The cat on the right is cagney whom could care less about catching anything...lol
Cagney & Lacy....

    Bookmark     June 27, 2013 at 9:42AM
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lesmc

Precious cats!!! Your digging dogs are awfully cute,too! I have had terrible problems with voles. They are worse than the rabbits. I even considered getting a cat, but I am allergic so......that won`t work! Moles do no damage to my garden, but my yard can become a mess. Mother Nature can be difficult, that`s for sure! lesley

    Bookmark     June 27, 2013 at 10:22AM
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zone6-nj

Thanks a lot for the replies! Glad to know its the scent I smelled in the garden center. I received my 2 from heirloom today. Will be putting them in the ground soon. A quick note though, there were 3 bushes in the rose garden of CM, and the other two seemed healthy but one was covered in something (blackspot?) and looked weak. From what I heard though, the disease resistance is good with this rose, am I right? And I'm guessing it needs full sun? Unlike some other Austin's that wouldn't mind shade at parts of the day?

Thanks again!

    Bookmark     June 26, 2013 at 10:12PM
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ken-n.ga.mts(7a/7b)

Mine is planted on the east side of my house along the front porch. It gets morning sun and by 1 PM it is shaded. It is just as happy as it can be. No blasting full sun that can cook or fade the blooms.

    Bookmark     June 27, 2013 at 10:05AM
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dmoore66(6 NorthWest NJ)

I have both and think Mr Lincoln is a much better rose

    Bookmark     June 26, 2013 at 2:12PM
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jim1961 Zone 6a Central Pa.

Great description & pic of FF pat_bamaZ7... :)
Glad to hear your Lincoln does so well dmoore66 ....:)

    Bookmark     June 27, 2013 at 9:54AM
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subk3

Of COURSE ignorance and lack of research have kept ND a popular rose. That's how the vast majority of the rose buying public actually buys their roses!

But around here the reason it sells well is because there are so many out there in neighborhoods looking wonderful and people see it and want it. It's that simple.

Now, I also have a theory why in my area there are so many ND and not many examples of other things. In the early 80s we had a several nights in a row well below zero and it wiped out all the teas and other warm weather roses that can do well here. ND is hardy a couple zones colder than most teas and it was still early in the general interest of Old Roses. I suspect many that were lost were unidentified and/or unavailable commercially even if you knew what they were. So they weren't for the most part replaced. But the ND lived on.

As to why I have them by those doorways? We don't use those doors--they are mainly for show. A hallway is on the other side and stray cane blooming on the other side of the window is a pretty lovely thing to see as you walk down that hallway. An quite frankly it's a perennial garden and it's just not that big of a deal to whack it back when needed. And I can whack it back and not worry if I've hurt it feelings or if it's going to sulk. It can completely defoliate from rose slugs and a few weeks later be back in business.

Considering all the temperamental, fragile, accident prone roses out there, there is always going to be a market for a robust one. Don't get me wrong there are things I don't like about it and since I bought them I've discovered other possibilities that might be as good or better and I've considered replacing them. But if I replace them it won't be because of their exuberance!

    Bookmark     June 26, 2013 at 11:31PM
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meredith_e Z7b, Piedmont of NC, 1000' elevation

I have two :) Mine repeat nicely (not continuously, but nice flushes), so I never get the comments about repeat other than to notice that I must've gotten a good clone.

I think her blooms are gorgeous. Much better in person, imho. But her utility for me is that she blooms in so much shade it's unreal!

I have one just cut and transplanted behind 6 ft tall old, old boxwoods and she's even blooming behind them, lol. She'll eventually climb up her wall trellis and find the sun, but I didn't expect that she'd bloom there at 2 ft tall :) The soil isn't great, as you'd imagine with boxwood roots thicker than your wrist. No problem for that girl :D

I'm not going to deadhead her, though! She's to be seen at a distance anyway there. I'll prune/tie once every year and that's it for that area.

My other one grows in evergreen trees under huge maple trees and just does her thing. I prune her pretty severely, but I just don't want her too tall or wild there. The pruning is more severe but it's no more work in my mind than the pruning I do on all my mature climbers.

I never did let her get out of hand in the first place, mind you. That would not be a good idea with New Dawn at all, no :) Bad soil is practically a prerequisite at the least, imho. (That's after she puts out more mature growth, btw, y'all. You could actually kill her as a little baby plant, I'd imagine).

    Bookmark     June 27, 2013 at 12:27AM
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t_bred(5)

Have Koko Loko here in Chicagoland(z5) planted last spring and has been a disappointment to me. Lost half the plant (while mounded) over the winter and the colors are just okay to me. Honestly, my ten year old Distant Drums is similar in color but much more hardy and free flowering. To be fair, my Koko Loko is grafted and I don't have much luck with grafted.

    Bookmark     June 25, 2013 at 9:49PM
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susan4952(5)

Mine is in second year and doing fairly well. Only about 12-15 inches tall. Am hopeful for future. Awesome color and form. DD is taller and more vigorous for me, but the myrrh is not my fave.

    Bookmark     June 26, 2013 at 10:49PM
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michaelg(7a NC Mts)

As Zack says, it sounds like you didn't prune enough to get rid of winter damaged canes.

Exposed grafts will be an issue if the temperature drops to around zero, which it will in Nashville sooner or later. Plant future roses with the graft just underground. With long-shanked fortuniana grafts, plant the rose slanting at a 30-degree angle to the grade so you don't have to bury the rootstock roots a foot deeper than they want to be. Cut off any roots that would project above the surface because of the angled planting.

    Bookmark     June 26, 2013 at 10:29AM
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poorbutroserich(Nashville 7a)

Awesome! Thank you gentlemen. This was my first Spring pruning and I pruned too soon I believe. Thanks for the fort planning instructions too.
Susan

    Bookmark     June 26, 2013 at 7:19PM
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RD8005

The main difference in damage symptoms between spider mites and thrips damage is that thrips are usually associated with irregularly shaped white or greyish-white spots distributed mainly along the mid-rib and side veins of plant leaves; while similar symptoms caused by spider mites are distributed randomly on leaves. Found this at http://old.padil.gov.au/pbt/index.php?q=node/13&pbtID=116 In addition, I see the leaf turning bronze colored then looking at the underside of the leaf with a magnifying glass can see small white "dots" moving around. This is the mite.
You will need to use a "miticide" to controll or kill the mites. It is difficult to do and you have to us a regular spray program. Miticides can be expensive, but I found a Spectricide product at my local Ace hardware that works for me.

    Bookmark     June 26, 2013 at 1:06PM
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nickl(Z7a NJ)

Just a note on thrips.

The Knock Out family seems to be particularly attractive to thrips. So much so that we can use our Knock Outs as "canaries in the coal mine" to give us an early warning that thrips are around and we should be on the lookout for them on our other roses.

    Bookmark     June 26, 2013 at 5:53PM
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hoovb zone 9 sunset 23

You planted them this year or last year?

Young plants not established don't have the resources (a strong root system, canes containing a lot of stored carbohydrates) to produce their best flowers, just like a 21 year old man is a lot stronger physically than he was when he was three.

Patience! This assuming the roses are getting regular water and are in decent soil and are getting a goodly amount of direct sunlight (6 hrs) daily during their growing season.

One thing exclusive of plant establishment is Thrips--are the edges of the petals brown? If you shake a flower over a white piece of paper you may see tiny brown insects--those are Thrips, a rasping insect that can ruin flowers. The other thing is extremes of weather--a forming bud can be damaged by a sudden near-frost or a nasty heat wave. But the other stuff first.

    Bookmark     June 26, 2013 at 2:31PM
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diane_nj 6b/7a(6b/7a)

Describe "deformed".

If they were hit by a cold snap during formation, that can do it. Also, if you mean strange green centers, that's called proliferation (there are threads with photos), and it happens in some varieties in the spring, usually on the very first buds to form.

    Bookmark     June 26, 2013 at 4:55PM
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