Roses forum: David Austin garden rose health question

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Hudson, NY
Jun 9, 2019 11:28 AM CST

I am into my third year as a garden rose weekend gardener. I planted 6 more bushes last year and they seemed to have taken nicely.

Two of the bushes are exhibiting the attached photo growth. A gardener friend thinks it is the beginning stages of Rosette disease, while someone a spoke with at a nursery thinks it is simply new growth. I am puzzled and want to take action but do not know what to do! Please help.

Thank you,

Thumb of 2019-06-09/Markdebolt/ca1506
Thumb of 2019-06-09/Markdebolt/f57365
Thumb of 2019-06-09/Markdebolt/111d9f

Name: Luis
Hurst, TX (Zone 8a)
Dog Lover Region: Texas Salvias Roses
Jun 9, 2019 12:55 PM CST
No RRD. Looks like new growth. That is all. For RRD, look for uncontrolled, huge growth in small/localized areas (say, 6+ inches or more; who knows how large it could get). RRD new growth may be red at first too but it will turn green after a while.
[Last edited by luis_pr - Jun 11, 2019 12:22 AM (+)]
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Name: Porkpal
Richmond, TX
Charter ATP Member Dog Lover Cat Lover Keeper of Poultry Keeps Horses I was one of the first 300 contributors to the plant database!
Garden Ideas: Level 2 Plant Identifier Raises cows Roses Farmer Celebrating Gardening: 2015
Jun 9, 2019 9:20 PM CST
It looks like healthy new growth to me too.
Zone 9, Sunset Zone 9 (Zone 9b)
Jun 10, 2019 10:08 AM CST
Looks like nice new growth to me! A lot of roses when they start having new growth, the color of the leaves and canes are red. They will later green up.
Hudson, NY
Jun 10, 2019 12:47 PM CST
Thank you all for the feedback.

I have a question for you about feeding your roses: In my rose garden I have DA carding mill, Charlotte and Boscobel.

Each bush was planted in a big hole on top of an inch of peet moss. I followed that with a 1:3 mix of Coast of Maine Bumper crop soil builder : the dirt I dig out. After planting I spread a 1/2 inch of mulch.

I spray the plant with an insecticide weekly I get those little holes and also the skeletonized looking leaf that indicates slugs (although I can't find them on the underside of the leaves.)

I also do a RX rose spray that I buy from a local nursery that proclaims
to help with bugs too but I mainly use it to prevent from black spot. Upstate NY has been so wet lately and my plants have suffered black spot later in the summer the last two years.

Lastly, during the growing season I have added a rose fertilizer, Bayer rose and flower, every 6 weeks.

Deer ate all of my flowers this spring. Last year I put those little garlic oil clothespins all over the place, mostly from drinking beer while cruising amazon. I figured they were snake oil but I thought why not?

I did not re purchase in time this year. Every bloom was gone! So disappointing but I learned my lesson. I re purchased the garlic oil and also bought that foul spray as well as little mounted repellants to sprinkle here and there.

I've read about more organic methods of fertilizing, like adding egg shells, coffee grounds etc. do you think these have any place in my garden?

Am I loving these plants too much?

[Last edited by Markdebolt - Jun 10, 2019 12:55 PM (+)]
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Coastal Southern California (Zone 13a)
Jun 10, 2019 1:57 PM CST
Hey Mark -- Unless your area is really overrun by insects, that's a load of chemicals you're using. I do understand, becaus we had a similar spray program . . . until the chemicals caused our dog to begin suffering grand mal seizures. We decided pretty quickly that perfect foliage was not a good trade-off. But I sure hope you are using a mask and at the very least chemical-proof gloves.

If you can't find the rose slugs, they are likely already dead.

Your feeding schedule sounds very good, I think.

If you want to really push the roses, you might play around with some alfalfa tea:

I swear, you can almost watch the plants growing like mad.
Long Island, New York, USA (Zone 7a)
Region: New York Roses
Jun 10, 2019 2:05 PM CST
I'm with jeri on the pesticides. I don't use them but I haven't had a huge problem yet where I've considered it; I prefer to be organic. I spray aphids off with a blast of water when I see a lot of them otherwise I leave them alone to feed the predators. I use an organic fungicide called OxiDate every 2 weeks as a preventative and every couple of days if someone has BS. It's my first year using it and I can definitely say that it's working. For fertilizing, I use Alaska Fish Emulsion on all first year roses and Rose-Tone on my established plants; both applied once a month. I think I'll give alfalfa tea a try next year everyone here seems to rave about it.
Hudson, NY
Jun 10, 2019 2:55 PM CST
Geez, I didn't even consider that I was using a lot of chemical. The RX rose spray
Thumb of 2019-06-10/Markdebolt/a8faf5

says it is natural. So the Bayer rose and flower is the load of chemicals?

That is good advice, I have two dogs and one of the breeds is prone to seizures. I'll swap out for more organic.
Name: Porkpal
Richmond, TX
Charter ATP Member Dog Lover Cat Lover Keeper of Poultry Keeps Horses I was one of the first 300 contributors to the plant database!
Garden Ideas: Level 2 Plant Identifier Raises cows Roses Farmer Celebrating Gardening: 2015
Jun 10, 2019 5:47 PM CST
You may find you don't need to spray with anything. My roses seem to do fine with mulch and a dose of manure and no spraying at all.
Name: Mike Stewart
Lower Hudson Valley, New York (Zone 6b)
Garden Photography I was one of the first 300 contributors to the plant database! Roses Seed Starter Container Gardener Bulbs
Peonies Clematis Lover of wildlife (Black bear badge) Dog Lover Cat Lover Birds
Jun 10, 2019 6:12 PM CST
Hi Mark,

Welcome to the rose forum. All of us here enjoy talking with other rose enthusiasts and sharing what we know and what works for each of us in our unique situations and climates.

I think the reference to a lot of chemicals comes from the following:

- Your weekly treatment is an insecticide (what is the brand name of this)?
- You also use Bonide RX, which is both an insecticide and fungicide (it consists of Neem oil, which is sprayed on the leaves)
- Bayer Rose and Flower Care is an insecticide, fungicide, and fertilizer (which is not sprayed, but sprinkled on the ground as granules, which means it's a "systemic" product taken up by the roots)

So it appears you have three insecticides and two fungicides in your program. It's a good idea to alternate fungicides, so that's not as much an issue as using three insecticides, which may literally be overkill.

I hope that gives you some insight into what Jeri was referring to.

[Last edited by Mike - Jun 10, 2019 7:24 PM (+)]
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Zone 9, Sunset Zone 9 (Zone 9b)
Jun 10, 2019 6:42 PM CST
I have very different growing conditions than you. I garden organically and used Neem Oil spray this year for the first time. Other than Hoplia beetles (which Neem does nothing for), I really have not had a bug issue this year. No aphids, no whiteflies, etc. I just used beneficial nematodes to see if that can help with the grub/Hoplia beetles and plan to use it again in about six months or so. Any other bugs, I pick off by hand.

For the first time this year, because of all the rain we have had, I have had black spot. I don't use a fungicide and have been picking off the leaves by hand. I know they will grow back. I am willing to put up with that rather than use something on the roses, if I don't have to. However, I also don't have the situation of a naked bush from all the leaves coming off due to black spot. So, I can't comment on if that is the case where you live.

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