Posted: 20/08/2015 at 09:41
Lilly P - the box in my garden has suffered dreadfully with box blight & last year I was on the point of ripping out the plants (a lot of moneys worth). Every single plant was affected and they looked every bit as bad (if not worse) than Monty's.
This year I decided to give it a final chance. I gave it a good feed just as new growth was starting and and mulched the soil around the plants really well to suppress any spores on the soil surface.
I then sprayed all the box thoroughly using the first product in Chicky's link. I sprayed again about 2 or 3 weeks later. Sprayed again (twice more) 4 - 6 weeks apart.
The plants look much much better than they have for the last 2 years & have regrown well - although they are a bit misshapen at the moment because dead bits have been cut out.
My plan is to give them a final seaweed feed this week and then leave them alone. If they are OK over winter I will feed them next year and try to avoid the fungal spray - but be prepared to intervene at the first signs if necessary.
There are a few signs of slight discolouration on some of the leaves but at the moment it doesn't look like the normal blight discolouration (fingers crossed).
I would suggest that you don't just start cutting out bits that look dead until you are certain they are. Some of mine regrew from wood that looked kaput. It is, however, maybe worth clearing them a little in the centre if they are very congested
Sorry to all those who don't like using fungal sprays but it is very disheartening to see something which provides fundamental structure to the garden being severely disfigured.