In article , wrote:
wrote:
Thirdly, removing blighted material is of marginal benefit, anyway,
as it overwinters in a large number of common plants and weeds, and
transfers by the wind. Yes, it's worth doing, but it won't make
much difference; spraying with Bordeaux mixture at the right time
will.

That's not a problem in this case, cos it's a growbag. Just have to
remember not to throw it on the ground, and not to grow potatoes in that one
over winter!

Don't worry about it - as I said, in the UK, blight overwinters only
in living plant material.

Bordeaux mixture may not be 'organic', but is just copper, which
is a required nutrient anyway. Unless you go absolutely bananas
with it, there won't be enough accumulation to make any difference.
More effective treatments that used to be used include benomyl,
and that should be kept a long way from all women between 6 and 60.
It's now banned for domestic use.


Regards,
Nick Maclaren.