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Re: Planted some Knock Out roses this weekend.

Posted: May 3rd, 2017, 1:52 pm
by HoosierLawnGnome
I don't think any rose likes wet feet. Standing water in the root zone would not be helpful.

When I plant my roses in my tight alkaline soil, I mix in equal parts peat moss, native soil, and compost - roughly lol, and plant them a little higher above the soil surface, accounting for 3'4" mulch to be above the bud union. We are a much colder climate than yours, so I imagine you can plant them higher on the surface as well without fear of them freezing over the winter.

Re: Planted some Knock Out roses this weekend.

Posted: May 3rd, 2017, 2:25 pm
by TimmyG
HoosierLawnGnome wrote:
May 3rd, 2017, 1:52 pm
... accounting for 3'4" mulch to be above the bud union.
That's some thick mulch! :shock: ;)

Re: Planted some Knock Out roses this weekend.

Posted: May 3rd, 2017, 3:19 pm
by HoosierLawnGnome
lol 3"-4" :) I'll edit my post hahaha

Re: Planted some Knock Out roses this weekend.

Posted: May 6th, 2017, 9:44 am
by Casutherland
MorpheusPA wrote:
May 1st, 2017, 7:53 pm
I think I'd try some Rose Pride. That does look like a disease.
So I was mixing up some rose pride to apply to my roses, and used my plastic measuring cup. It turned it a milky white color once I washed it out. What's the deal?

I also use that cup to mix my Serenade and companion. Is it going to hurt that now? How do I get it clean?

Re: Planted some Knock Out roses this weekend.

Posted: May 8th, 2017, 7:32 am
by MorpheusPA
It probably ate through the plastic and scored it a bit. It's fine to use for mixing other things, though I wouldn't use it for Rose Pride again. It'll just eat through more.

Re: Planted some Knock Out roses this weekend.

Posted: May 14th, 2017, 10:53 am
by bernstem
The smaller knock out looks like it will be fine. You can gently fertilize it as well which will help. Try to use a slow release fertilizer (Milorganite is good) as young roses sometimes don't respond well to a high salt fertilizer. The drainage issues may also be stressing the rose. As Morpheus said, roses don't like wet feet. They prefer well drained soil high in organic matter content (like most garden plants).

The spotted rose looks like it could be an early disease. Generally knockouts are very disease resistant, but they can still be affected if they are stressed. New plantings are by definition stressed. The other possibility is Rose Mosaic Virus, but the leaf lesions tend to be more distinct than what I see on yours. Try a fungicide first. You can't do anything about rose mosaic virus. I like Bayer rose disease control with Tebuconazole. It is a systemic fungicide so won't be washed off by rain after the initial application. The Ortho RosePride with Tritaconazole is very similar to the Bayer. The linked product at ACE hardware is an insecticide and won't help with fungal disease.

Re: Planted some Knock Out roses this weekend.

Posted: May 15th, 2017, 10:57 am
by Casutherland
bernstem wrote:
May 14th, 2017, 10:53 am
The smaller knock out looks like it will be fine. You can gently fertilize it as well which will help. Try to use a slow release fertilizer (Milorganite is good) as young roses sometimes don't respond well to a high salt fertilizer. The drainage issues may also be stressing the rose. As Morpheus said, roses don't like wet feet. They prefer well drained soil high in organic matter content (like most garden plants).

The spotted rose looks like it could be an early disease. Generally knockouts are very disease resistant, but they can still be affected if they are stressed. New plantings are by definition stressed. The other possibility is Rose Mosaic Virus, but the leaf lesions tend to be more distinct than what I see on yours. Try a fungicide first. You can't do anything about rose mosaic virus. I like Bayer rose disease control with Tebuconazole. It is a systemic fungicide so won't be washed off by rain after the initial application. The Ortho RosePride with Tritaconazole is very similar to the Bayer. The linked product at ACE hardware is an insecticide and won't help with fungal disease.
Thanks Bernstem! I purchased some Ortho RosePride Disease Control a few weeks ago, and have already done two applications. I really have no noticed any difference or clearing up on the disease. I followed directions to a tee on the bottle. Maybe I should try something else?

Re: Planted some Knock Out roses this weekend.

Posted: May 16th, 2017, 1:14 pm
by bernstem
Rose diseases will take a while to resolve. Yellowing leaves are not going to recover, may worsen and may even drop even with effective fungicide treatments. What you want to prevent is spread of the disease to other, unaffected parts of the plant. If it is not worsening, then the fungicide is working. Triticonazole is a systemic fungicide so is absorbed by the plant and will provide protection even after rain. I would follow the direction for active disease. You may not need to apply weekly.

Re: Planted some Knock Out roses this weekend.

Posted: May 26th, 2017, 1:07 pm
by Casutherland
So I just got back on vacation and it appears that my double knock on the front yard got knocked out while I was gone :(.

Can you guys help me diagnose the issue here. No new blooms and it's looks pitiful..


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Re: Planted some Knock Out roses this weekend.

Posted: May 27th, 2017, 5:41 am
by Jackpine
That's damage from a fly larvae. Get some Spinosad and spray that top and underside of the leaves.

Re: Planted some Knock Out roses this weekend.

Posted: May 27th, 2017, 7:47 am
by bernstem
Rose Slugs (sawfly larvae). If you ignore them, the roses will look ugly, but beneficial insects and animals will come in and eat the slugs. None of your roses are damaged enough that they won't recover just fine. You can treat with chemical or organic insecticides if you want, but those will have a detrimental effect on beneficial insects. A non-chemical method of control is to wash off the rose slugs with a garden hose. That will kill many of them also. Personally I ignore them and accept the damage.

Re: Planted some Knock Out roses this weekend.

Posted: June 7th, 2017, 6:08 pm
by Billybob
I have a quick question....when the blooms wind down just before they fall off, mine turn a light pink. My knock outs are red. Is that normal or is my soil lacking something?

Re: Planted some Knock Out roses this weekend.

Posted: June 16th, 2017, 10:28 am
by bernstem
The color intensity of most roses fade as the blooms age. I see it most on dark reds and purple roses. It is normal.