DavePoole Torquay writes
Kay wrote:
It seems to be biennial in habit - if doesn't flower the first year, and
it dies in the second year after flowering

Ah yes, I forgot about the north-south divide. In the south, seedlings
germinate quickly and make good progress often continuing to grow
throughout winter. These usually flower in late spring and die as the
seeds ripen - hence the annual bit. Further north, the seedlings make
much less headway, barely reaching more than a couple of centimetres
before winter

Probably about 6 inches with us in Yorkshire, much the same where I grew
up in Worcestershire. I hadn't realised they could do the whole lot in
one year further south!


--
Kay