This rare, tallish treasure has sizeable, mauve-throated, sky-blue blossoms concentrated on one side of the stem, (as indicated by the species name 'unilateralis'). Strong stems bear grayish leaves which are long and narrow. Blooming mainly in June and July, this infrequent denizen of foothills and montane zones has a cousin, Penstemon secundiflorus, which also has flowers toward one side of the stem, the epithet 'secund' also meaning "one-sided". Very few good seeds collected.
For best results, sow immediately onto a good soil-based compost. Cover the seeds with fine grit or compost to approximately their own depth. They can be sown at any time, and germination can sometimes be quicker if kept at 15 to 20 degrees C. We sow most seeds in an unheated greenhouse and wait for natural germination, as many seeds have built-in dormancy mechanisms, often waiting for natural spring germination, hence giving them a full season of growth.
Packet Content:10 (Approx)