In article ,
Stewart Robert Hinsley writes:
|
| Possibly it depends on variety, but the ones that are spreading across
| my allotment (I'm going to dig some out and give them to my
| cousin-in-law come autumn) form new plants via roots that run maybe an
| inch under the surface. The roots beneath the canes are deeper, but I
| don't have two feet of top soil for them to grow in, and I don't recall
| them going down more than a foot.

I do and they did, when I had them. I dug them out 1' down, and they
still came back. Only weakly, unlike bindweed.


Regards,
Nick Maclaren.