I used to be a fan of Belle de Fontenay but if there is any blight about they will get it. So it really pays to plant the latest varieties, Orla is good but is thin skinned so cannot be left long in the ground because of slugs. 'D T Brown' gave away Emerald Vale this year as a trial and they have been fantastic so I would highly recomend them.
A few years ago the head-gardener from Heligan Vegetable Garden came to give talk, apparently it is impossible to grow main-crop potatoes in Cornwall organically, so maybe if blight has been a problem you just have to compromise and use a suitable spray?
Autumn fruiting rasps are cut down in the spring and a new cane grows and fruits in the same year. Summer fruiting have the old cane removed after picking and the new canes retained and tied in for next year.
