I could find leaves that looked like that on any number of my roses at any time of the year, simply due to normal leaf senescence - ageing of the leaves at which point they fall off -..
I think you're delving into the world of plant pathology. We can only guess looking at an odd photo or two. If I had what you have, I would put most of it down to the weather conditions causing a variety of issues. You have roses in quite small pots 15 x 15''. I've no idea what they're made of, it could be the roots have 'fried' in the heat. Compost in pots can get very warm and make for hostile conditions. In extreme heat they are best removed to shady areas if possible.
If that was mine, I wouldn't be worried in the slightest, but just snip off all affected leaves and await a recovery. I might remove from pot and inspect, even bare rooting the plant and replanting. Obviously this sets the rose back quite a bit.
I think you're wanting an absolute answer and a remedy but nobody can really give you that as we don't know what your cultural conditions are, what medium they're growing in, or the roses you're growing.
Most of us in the south have had phenomenal weather patterns, unknown territory with this heat and drought.. Plants have suffered all sorts of stress, I've just removed a load from my garden..
This rose defoliated in July during the heatwave, I dug it up and transferred to this pot. It's now fully recovered and with buds.. This rose has defoliated. I will clear up the leaves and it will soon recover, and I expect it to be flowering again in September.. Looks a bit like the worst of yours.
Really, no sweat... don't get stressed out by it, roses get all sorts of leaf issues, most will get over it when the weather changes..
I'm not looking for absolutes, i know that is impossible, more just a noob looking for reassurance I think
So, just keep them tidy and go with the flow then - there is nothing in this thread that shouts "over watering" or "disease" - I think that is my main concern, if it's just weather then great.
The pots sadly are mostly black or brown plastics, I had never thought of roots overheating! I'll stick to china type pots form now if i can, hopefully that will help in future?
I did have a rummage through the soil this morning and can not see any signs of grubs etc.
aah.. plastic pots.. in the heat we've had? those roots have fried in full sun..
.. just trying to reassure you though.. here are some leaves on roses I have right now.. this is just normal ageing foliage, which will drop off or I can snip off.. obviously something more catastrophic has happened with yours..
Thanks, those pictures look very similar to mine, mostly if not all.
Are china style pots better? I can't plant them as the soil under the area they sit on is totally unusable - its 100% root-bound from the trees on the other side of the fence, its like concrete - we had to get a guy with a mini-digger in to shape it when the dwarf wall/patio was installed.
@DaveKearley Hi Dave. I don't want you to think I'm unsympathetic, I know it's a bummer when growing roses for the first time and you get this.. Blame it on the weather..
..for potted roses this is what I, and others more specialist than me, would recommend.
An ornamental ceramic pot 18'' x 18'' deep approx.. it's not always easy to get this exact measurement. I don't put anything in base for drainage but you can put some chopped bits of polystyrene over the drainage hole, before filling with compost. This is recommended by David Austin.. For compost, you should use a 50/50 mix, John Innes no. 3 / a quality multi purpose. It's beneficial if you can to also mix in, a spadeful of your home garden soil if it's half decent, plus a scoop of composted manure, if available. These are not essential but I have got better results from this.
All best done in late winter in time for Spring. Feed with a fertilizer in early March sprinkled over the surface and rummaged in.. David Austin now do a slow release that requires just one feed per season. I also recommend one called Vitax Azalea, which is excellent for roses but any proprietary rose food will do the job.
You can use plastic pots - in normal years.. you can also get away with smaller pots, but repotting will be necessary, and more frequently. I grow roses in just 12'' x 12'' pots for one season before transplanting.
Hope this is of some use. Perhaps next year it'll be more normal and you won't see these issues..
May we know the names of the roses you have please? I was wanting to ask..
..that Hessayon book, the rose expert, was the first one I ever bought.. I felt so proud to own it at that time.. circa 1980's.. but it's a bit old fashioned now. I would never plant roses under the overhang of trees though, I did it then and found they didn't thrive, but they were planted in rooty soil, so I put it down to that. In your situation I'm not sure I'd worry too much, but it's not ideal shall we say..
See how you go..
..just to add re feeding... don't forget to liquid feed your roses throughout the season with Tomorite NPK 4-3-8.. this gives top results for roses in pots.. I do little and often, but once a week is good..
@Marlorena Unsympathetic? far from it, its all good advice
From the tags I have, there are these roses... David Austin "The Pilgrim" x2 Rosa "Easy Does It" (Floribunda) Rosa "Amber Queen" (Harroony) plus two other older ones from my late mothers collection, unknown variety.
I used a liquid rose food because they were in pots and drip irrigated, there is no opportunity for watering/rain to wet and release a dry fertiliser.
If you want to stick with cheaper plastic type pots, I found this one especially good.. it's thicker than usual. I got it from Dobbies garden centre, measures 15'' x 18'' deep. I had excellent results from it, although it never went through a summer like I've just had.
..the rose is 'Vanessa Bell'..
Trough pots are also good for shorter climbing roses. ..this is 'Lichfield Angel'..
..lots of members on the Roses thread grow stunning roses in pots, some ceramic and some a different perhaps more expensive type.. .. members Tack, cooldoc and celcius all grow better roses in pots than I do.. amongst others too many to mention..
@DaveKearley ...those are all good roses Dave, under normal conditions. I would be pleased to have any of those.
I'm surprised you can't use a pelletized fertilizer though, I just sprinkle over the top and finger it in, then water it.. I don't really get that, but you know what you've got there..
Posts
I think you're wanting an absolute answer and a remedy but nobody can really give you that as we don't know what your cultural conditions are, what medium they're growing in, or the roses you're growing.
Most of us in the south have had phenomenal weather patterns, unknown territory with this heat and drought.. Plants have suffered all sorts of stress, I've just removed a load from my garden..
This rose defoliated in July during the heatwave, I dug it up and transferred to this pot. It's now fully recovered and with buds..
This rose has defoliated. I will clear up the leaves and it will soon recover, and I expect it to be flowering again in September.. Looks a bit like the worst of yours.
Really, no sweat... don't get stressed out by it, roses get all sorts of leaf issues, most will get over it when the weather changes..
I'm not looking for absolutes, i know that is impossible, more just a noob looking for reassurance I think
So, just keep them tidy and go with the flow then - there is nothing in this thread that shouts "over watering" or "disease" - I think that is my main concern, if it's just weather then great.
The pots sadly are mostly black or brown plastics, I had never thought of roots overheating! I'll stick to china type pots form now if i can, hopefully that will help in future?
I did have a rummage through the soil this morning and can not see any signs of grubs etc.
.. just trying to reassure you though.. here are some leaves on roses I have right now.. this is just normal ageing foliage, which will drop off or I can snip off.. obviously something more catastrophic has happened with yours..
Are china style pots better? I can't plant them as the soil under the area they sit on is totally unusable - its 100% root-bound from the trees on the other side of the fence, its like concrete - we had to get a guy with a mini-digger in to shape it when the dwarf wall/patio was installed.
Hi Dave. I don't want you to think I'm unsympathetic, I know it's a bummer when growing roses for the first time and you get this.. Blame it on the weather..
..for potted roses this is what I, and others more specialist than me, would recommend.
An ornamental ceramic pot 18'' x 18'' deep approx.. it's not always easy to get this exact measurement.
I don't put anything in base for drainage but you can put some chopped bits of polystyrene over the drainage hole, before filling with compost. This is recommended by David Austin..
For compost, you should use a 50/50 mix, John Innes no. 3 / a quality multi purpose.
It's beneficial if you can to also mix in, a spadeful of your home garden soil if it's half decent, plus a scoop of composted manure, if available. These are not essential but I have got better results from this.
All best done in late winter in time for Spring. Feed with a fertilizer in early March sprinkled over the surface and rummaged in.. David Austin now do a slow release that requires just one feed per season. I also recommend one called Vitax Azalea, which is excellent for roses but any proprietary rose food will do the job.
You can use plastic pots - in normal years.. you can also get away with smaller pots, but repotting will be necessary, and more frequently. I grow roses in just 12'' x 12'' pots for one season before transplanting.
Hope this is of some use. Perhaps next year it'll be more normal and you won't see these issues..
May we know the names of the roses you have please? I was wanting to ask..
See how you go..
..just to add re feeding... don't forget to liquid feed your roses throughout the season with Tomorite NPK 4-3-8.. this gives top results for roses in pots.. I do little and often, but once a week is good..
Unsympathetic? far from it, its all good advice
From the tags I have, there are these roses...
David Austin "The Pilgrim" x2
Rosa "Easy Does It" (Floribunda)
Rosa "Amber Queen" (Harroony)
plus two other older ones from my late mothers collection, unknown variety.
I used a liquid rose food because they were in pots and drip irrigated, there is no opportunity for watering/rain to wet and release a dry fertiliser.
So much to learn
..the rose is 'Vanessa Bell'..
Trough pots are also good for shorter climbing roses.
..this is 'Lichfield Angel'..
..lots of members on the Roses thread grow stunning roses in pots, some ceramic and some a different perhaps more expensive type..
.. members Tack, cooldoc and celcius all grow better roses in pots than I do.. amongst others too many to mention..
...those are all good roses Dave, under normal conditions. I would be pleased to have any of those.
I'm surprised you can't use a pelletized fertilizer though, I just sprinkle over the top and finger it in, then water it.. I don't really get that, but you know what you've got there..
Does the gravel topping keep weeds down or some other reason?
I have to use large pebbles (small fist size) to keep the squirrels from digging them all up.
Ill try a slow-release food and see how it goes, any recommended or just go with a known brand?