The "Mountain Blue Vervain" comes from the southern states of the USA where it grows at altitude amongst rocks and gravel. The flowers, which grow on the ends of thick, rough-leaved stems, bear a striking resemblance to lavender, slowly opening down the long poker of buds, rather like a burning firework.
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.
Common name:MacDougal Verbena