GEUM GOLDEN GIANT
This truly exceptional plant suddenly appeared in our trial ground and appears to be a hybrid. But of which plants we cannot discover, although we suspect Geum calthifolium may be one parent! Nonetheless it appears to come true from seed, producing extremely vigorous plants with tall, strong-stems clad in thick leathery leaves, above which open numerous large golden buttercups. If well-fed could be a monster.
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.