On the CTG episode that first aired May 2, 2009, Chris Wiesinger from Southern Bulb Company digs into bulbs you plant once for generations of flowering.

Bulbs you plant once

Oxblood lily
Red spider lily (Lycoris radiata)
Pink rain lily (Zephyranthes labufarosea)
White rain lily (Zephyranthes candida)
Tulipa clusiana ‘Lady Jane’
Tulipa clusiana ‘Tinka’
Narcissus tazetta  Grand Primo
Narcissus tazetta Golden Dawn