Raspberries are related to brambles, they will spread in time just like brambles
My dad has a problem with 'wild' raspberries - they have spread prolifically all over an area where he removed some pines to plant some fruit trees. I had assumed it was because the pines had created favourable soil pH and removal of cover had let the light in, but the theory of root interference is interesting because he would have been digging old tree roots out and new tree roots in....
The known varieties he has planted in his fruit cage just feet from the edge of the 'wild' patch really have not done very well, in fact I think they have withered and died and the last time I was up he had tried moving some 'wild' ones into the cage....
I think autumn raspberries reproduce just fine, but you need to prune them at different times to summer to get the most new growth out of them. I must look that up again, I made a mess of it last year!
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I'm considering getting some of this http://www.gardenselect.co.uk/rootex.html to try to confine mine
Gardening in Central Norfolk on improved gritty moraine over chalk ... free-draining.
Raspberries are related to brambles, they will spread in time just like brambles
My dad has a problem with 'wild' raspberries - they have spread prolifically all over an area where he removed some pines to plant some fruit trees. I had assumed it was because the pines had created favourable soil pH and removal of cover had let the light in, but the theory of root interference is interesting because he would have been digging old tree roots out and new tree roots in....
The known varieties he has planted in his fruit cage just feet from the edge of the 'wild' patch really have not done very well, in fact I think they have withered and died and the last time I was up he had tried moving some 'wild' ones into the cage....
I think autumn raspberries reproduce just fine, but you need to prune them at different times to summer to get the most new growth out of them. I must look that up again, I made a mess of it last year!
Cut them all down to ground level in February Boater - couldn't be simpler
Gardening in Central Norfolk on improved gritty moraine over chalk ... free-draining.
I'll set my alarm for Feb