Makiko, I have found Tulipa saxatillis is one which keeps coming back and flowering for me. It doesn't set seed, but does multiply with offsets. This is Auckland, New Zealand, equivalent to Zone 10a. Am trying my hand at a lot more species to see which will do well here without chilling. A bit like Tony Advent..... Ina Ina Crossley Auckland New Zealand zone 10a On 17/11/2013 7:47 a.m., Makiko Goto-Widerman wrote: > Tulipa 'Lilac Wondre', 'Tulipa 'Sylvestris' and Tulipa 'Clusiana' are reliable to come back > every year. > > Makiko