The "Yellow Flag" is the second of our worthwhile-to-grow native wild irises. Large bright yellow flowers flare open in spring amidst stiff green leaves. Supposedly a bog plant, but it also thrives on our dust-dry hillside!
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:Yellow flag, Yellow iris