Anyone with limey soil and trying to grow these may consider amending the soil to be neutral or slightly acidic. They are after all Western lilies native to areas of forest humus. Looking through my reference books this morning one claims that they tolerate lime but I'm not so sure.
Regarding established clump die out, I have been wondering if overcrowding was a problem. Both of my clumps of pardalinum and pitkinense had become crowded as each year new rhizomatous bulbs form underground. In fact the pitkinense bulbs were coming out of the ground; I think the bulbs may have even been overlapping one another. I recall having planned to dig and divide at the next chance but that chance didn't come.
Well I think it is time to dig deep in my freezer and see if I have some seeds. If I start them this year I may see bloom in... oh I don't even want to think about how long it takes.
