I've been thinking about purchasing some alliums to grow in a tough spot...dry with some red clay but have been ammending it yearly. Any advice? I'm wanting to grow the really tall ones, possibly "summer drummer".
Yes, all of those tall aflatuense ones do great in heavier soils. Globemaster, Purple Sensation, Gladiator, etc. There are about a dozen of them in Brent and Becky's bulb catalog. They even self sow so you can have lots in just 3 years-it doesn't take long from seed. May I also recommend trying Eremurus, the foxtail lilly. They get tall, are really spectacular, and need the same things as alliums do.
"Wow, Clare, your gorgeous Forsythia always makes to green with envy! Mine have been in 4 yrs now and only just starting to get themselves into gear and put on some growth. We have the occasional sparse flower, but I want what you've got!