Blue and purple salvia together
Well,since I nixed the use of the lobelia in my full sun - crescent shaped bed, I decided on blue salvia and purple salvia planted together, staggered. The blue can reach 12" (or more, like it did there one year) and the purple around 10". I've planted both of these annuals more than once over the years and have always had great luck with them - even in the hottest of summers. My only concern is that the blue's foliage will crowd out the purple. Guess I'll find out come late June or early July. I'll try to post a photo.
One note, the two flats of purple were the last ones at the nursery and had already been pinched back - some of them severely. Normally salvia doesn't mind that so I'm optimistic.