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Mildrew emergency!!

brent.purtellbrent.purtell Posts: 9
in Problem solving
Hi all. I am a designer currently completing my first show garden for the upcoming RHSCARDIFF show. 

I received a bunch of Euphorbia amygdaloides purpurea for the show, but the Problem is that they have a bad case of powdery mildew.... I received them today and treated them with systemic fungicide, but what I don’t know, and can’t seem to find out, is how long the treatment takes to work, and will the leaves return to full health, or does new growth need to come through and the infected leaves drop off...

i’ve treated mildrew plenty of times before, but to be honest, have never really paid attention to the above.. 

i’m hoping that with Amir of love and care, I can get them back to full health, rather than finding/buying new ones (over 30 of them..)
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Posts

  • AnniDAnniD Posts: 12,585
    Hi @brent.purtell , congratulations on your first show garden. I have had a look into powdery mildew on these plants, according to the RHS, they are susceptible to grey mould (which as far as l can ascertain is something different). I think with the timescale you have to work with, it may be pushing it to have them recover in time. Can you have a word with the supplier and get replacements ? If they are named on your garden as one of the suppliers involved, it may be in their interest to help! If not, hopefully you have a back up. If not, is it within the rules to use another euphorbia under the circumstances? 
  • brent.purtellbrent.purtell Posts: 9
    Thanks @AnniD. I’ve had a good look and it’s definitely powdery mildew. I could switch the plants for something else, however it would be difficult at such short notice. I’ll give them a week and see if there is any improvement. If not, i’ll Need to do some shopping..
  • purplerallimpurplerallim Posts: 5,287
    I know this is a long shot and would be difficult with so many plants, but to help rid the plants of it I have used a mix of water and lemon juice on cotton balls wiping the leaves to rid them of the mildew. May not be helpful to you but if you tried it on a few plants just to see if it helps the speed at which they improve. Good luck.
  • brent.purtellbrent.purtell Posts: 9
    I’ll give it a shot! Will take a while, but i’d prefer to turn these plants around, rather than finding more. Thanks! 
  • purplerallimpurplerallim Posts: 5,287
    Let us know how you get on, with the plants and the show.😃
  • AnniDAnniD Posts: 12,585
    @purplerallim, l've never heard of that before ! Will have to give it a try should the need ever arise.
    @brent.purtell, good luck, hope it works. If you get the chance, come back on here and give us an update. Fingers crossed  :)
  • brent.purtellbrent.purtell Posts: 9
    Will do. Treating it is easy, but it’s a case of whether they will turn around completely in just under one month... the race is on and i’ll Post updates 😅
  • purplerallimpurplerallim Posts: 5,287
    The only time it's a bit difficult is for acid hating plants, they may not take kindly to it. I have clay alkaline soil but no really hating acid plants.
  • brent.purtellbrent.purtell Posts: 9
    The situation on day two. Day one was repotting, feeding and spraying. Keeping them in a polytunnel 
  • DovefromaboveDovefromabove Posts: 88,147
    Is that mildew or is it a residue left after watering/feeding?

    Gardening in Central Norfolk on improved gritty moraine over chalk ... free-draining.





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