In article ,
says...
Stewart Robert Hinsley says...
Many plants flower once and then die, including annuals and biennials.

Would it be worth while collecting any seeds from a gone-
to-seed bamboo and sowing them? Do they need any special
climate or care to germinate?

I saw a huge bamboo clump at some famous country house on
TV that was supposedly very old (may have been 50+ years
but I can't remember) and the head gardener was quite sad
because the clump was flowering and he would lose the lot.

Would any young runners from the parent bamboo also die?

In a garden situation the clump does not always die, some small part will
often survive but take years to recover its former size and vigour, the
seed is like sowing any grass, so long as the compost is not water logged
they are easy and it is usually quicker to raise new plants.
--
Charlie Pridham, Gardening in Cornwall
www.roselandhouse.co.uk
Holders of national collections of Clematis viticella cultivars and
Lapageria rosea