If you want to grow bearded iris in your yard or garden, this article is a must-read, because it includes everything you need to know about growing irises. We’ll teach you how to grow, maintain, and divide bearded iris, which is one of the most elegant flowers for spring and summer.
Fertilize Bearded Iris: Provide a light application in early spring and again a month after bloom . Place fertilizer around rhizomes, not directly on them. Alfalfa pellets (without salt) are extremely beneficial when incorporated in the soil around newly planted irises. Do NOT use Feed and Weed preparations.