Columbine is a perennial. All species are quite hardy, but many also
tolerate hot summers (e.g., southern California). Some grow wild in the
Rocky Mountains of Colorado, and there is a wild species (Aquilegia
vulgaris) native to Europe.
The plants require good drainage but are otherwise not fussy about soil.
They tend to be short-lived. Both hybrids and species readily reseed,
which is good in a garden because then seedlings replace the older plants.
--
David E. Ross
Climate: California Mediterranean, see
<
http://www.rossde.com/garden/climate.html>
Gardening diary at <
http://www.rossde.com/garden/diary>