A very interesting link Dennis, Thankyou. I'd like to try these American Delphiniums more. I grow Delphinium orfordii, another summer dormant delphinium, in a trough with a jonquill daffodill and Tulipa kurdica for company. It is in a cool position and the growing medium is mostly 6mm grit with a little loam. I feed it occasionally in March/ April and plenty of water in spring. It self seeds a little. The origional plant took three years to germinate from a seed exchange. It has been in the trough for about six years. I used to grow D tricorne as a "bulb" in a pot for about six years but it did not survive when I last moved house, I gave it a richer mix. but it only did well for about three years. It did take a year out once, when it stayed dormant but grew the following year. Peter (UK) On Wed, Jul 13, 2011 at 4:11 AM, Dennis Kramb <dkramb@badbear.com> wrote: > Hey everyone, I might have found the answer to my question... > > According to > http://illinoiswildflowers.info/prairie/plantx/… "The > preference is full sun, rather dry conditions, and soil that is rocky or > sandy. This wildflower dislikes competition and prefers barren ground where > the ground vegetation is sparse." > > So this would explain why it failed to establish in my prairie bed.... too > much competition. I will try it again in my gravel bed where Opuntia > flourishes. :-) > > Thanks for the feedback! > > Dennis in Cincinnati > _______________________________________________ > pbs mailing list > pbs@lists.ibiblio.org > http://pacificbulbsociety.org/list.php > http://pacificbulbsociety.org/pbswiki/ >