Agastache in clay soil
Wondering if anyone has successfully grown any Agastache in amended clay soil. I know that some varieties prefer lean/fast-draining (e.g sandy) soil, but others are more tolerant of heavy soil (according to what I've read).
Are there any that not just tolerate, but will thrive in heavier soils? I'm asking those of you with personal experience, not just what you've read or heard.