Killing grape hyacinths
Does anyone know a way of killing grape hyacinths?
Obviously I can dig up the ones I can get to, but over the years they have propogated underneath my patio over a very large area and come up through the cracks every year.
I have tried weed killer without much effect, but I guess timing would be critical because they can just store up their energy in the bulb.
Any advice would be gratefully received.
dch222
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