I see a mass planting of crocus in my future. Here I have a huge area under my Big Rhododendron left unoccupied with only the suckering Lillac, till the Erythroniums and T.Sylvestris appear in late spring. Now it I had only thought about this last Autumn. But I only started reading E.A. Bowles 'My garden in Spring' this winter.
Rhodies and Lillac underplanted with C.atticus which is now C. sieberi subsp.atticus. or C.crewei now C. biflorus , or perhaps I should just stick with Tommies !