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what's this on my clematis leaves?
i've forgotten the name of this even though i placed markers in the ground i can't find it now but i think it's called 'something' blue, last year it had these same purple blotches on the leaves, and i posted but didn't get an answer, does anyone know what it is and what i should do about it, also will it spread to 'mrs george jackson' clematis which is planted next to it now? thank you 
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It may be leaf spot which is a symptom of poor air circulation around the plant. If it is, you need to remove the affected foliage and then give this plant and its neighbour a good dollop of slow release clematis food to help them fight off disease and be careful not to splash the remaining foliage when watering.
When you attach trellis to a support to train clematis and other climbing plants it is always a good idea to put battens on the wall, fence or shed and attach the trellis to that. It lets a bit more air circulate behind the plant stems and leaves as they grow. It looks as tho you've done that but maybe you could use thicker battens?
thank you,i have the battens in between and it has good air circulation, it isn't practical to put on bigger battens.
i've cut all the affected material off but this one gets it every year, if it is what you say, i'm guessing it will spread to the 'mrs george jackson' which i planted yeaterday and woodlice have eaten the bottom flowers overnight
In order to improve the circulation behind mine I attached little blocks to the wall and then attached my trellis to those. It made a couple of inches of difference and as it was a montana, they were soon covered. It meant the tendrils could go up the back too.
You could try spraying with rose clear sanjy. I have a honeysuckle which gets patches like those and roseclear does the trick. Do Mrs Jackson as a preventative while you're at it.
thanks pp, i do have battens of wood behind the trellis already, i might have to resort to rose clear if it comes back.
My honeysuckle is swinging on a fence all out on it's own so it doesn't seem to be a circulation thing with it. There's just no telling.
sanjy67 - my honeysuckles (new last year and in large pots) have developed those purplings on the leaves as well and since the swarms of greenfly have come to everything this last week, all the new shoots are absolutely covered. I've given up blasting with the hose every morning before the sun reaches the garden and I'd wondered if my hosing was causing problems.
I have nowhere left in the garden to transplant the two in large pots so am having to leave them where they are in the pots. I had decided just to leave them and see if things improve as the summer moves along. Not sure what else to do. I hadn't thought of using Rose Clear on them so should maybe try that tomorrow morning before the sun hits the garden.
I was out with my fairy up liquid first thing this morning yarrow. I didn't think to rose clear my lupins and a couple of spikes were a weird shape and when I felt them they were sticky! They got a good douse! It seems good weather for plants is good weather for what eats them!!
plant pauper - I need to gee up with the fairy as well I think. I'm not experienced with Rose Clear though I bought some this year but always hesitant to use it more than once! Paranoia about ailing roses! I'm miffed that absolutely every plant seems to be housing greenfly just now. This pic is on my strawberry plants (I only have 2 - tiny garden - 2 plants in pots). Don't want to use Rose Clear on them so it will be a fairy dousing. I only blasted them with the hose yesterday. They are driving me mad.
It's the way they just all sit there, hundreds of them - completely oblivious and giving no reaction to my big finger and thumb homing in to squish them. Every time I squish I shake my hand as if I've just been bitten by something because I'm slightly squeemish with tiny things - but not so with bigger things. LOL!
I had never used Rose Clear (never had roses) till I moved into this house. My mum reommended it and it does definitely keep the roses healthier. I had Willow wrens/ warblers on a couple of mine last week but they seemed to lose interest so I took up spraying again.
The honeysuckle that I mentioned is on the fence and looked, to all intents and purposes, dead. The leaves were all that purple blotchy stuff on sanjy's clematis so my mum gave it a squirt on the way past very now and then. We were too busy sorting out the house to start digging plants out. Total recovery and this year it has loads of blooms!
Looks like a wee spot of white fly there too yarrow. You may get squirting!!
Last edited: 06 June 2016 15:19:11