Planted these in a location that gets full sun except in the early morning. Not a single one came up. I don't know if these were duds, but it certainly wasn't worth the "value" price.
They came as 12 bulbs with instructions to soak in water for several hours before planting which I did. Only 6 bulbs germinated in a partially shady tree bed. The good news is they started flowering now and in early summer and look very beautiful. I did fill the empty spots with other green ground covers. I will know if they spread only next year.
I purchased these on special several years ago. The first year was a moderate show but they have multiplied generously every year since then, spreading just like a weed.......love them.
I planted five of these in partial sun/shade two weeks ago and just noticed that three of them are about 3" high already. I followed the planting instructions: "Plant crown 2-3" deep in well dug humus enriched soil". I dug out some bad soil (clay) about 6-8" deep and replaced it with the good stuff.