Interestingly, Tulipa sprengeri featured in last month's IRG : http://srgc.org.uk/logs/logdir/… ...... where among the mentions in the SRGC Forum commented on where those from Rodger on the plant - the consensus of opinion from Forum discussions is that flowers can be expectd from Tulipa sprengeri in around four years from seed. It won't self sow everywhere, I'm afraid - but it is a very lovely tulip/ M.