Appropriately named, this rare plant is from Japan. With slowly lengthening royal blue spires, up to 30cm long, and 60-90cm stems lightly clad with pointed sawtooth leaves, it flowers until late September.
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:Heartleaf Speedwell