When to plant Bearded Iris?

Bearded iris thrives in full sun and well-drained soil, making it ideal for sunny borders, gravel gardens, and raised beds. Choose a spot that receives at least six hours of direct sunlight daily; flowering will be poor in shade. The plant tolerates loam, chalky, and sandy soils but demands excellent drainage—waterlogged conditions quickly rot the rhizomes. Plant bearded iris rhizomes in March, April, or May for spring planting, or in September and October for autumn planting. Autumn planting is often preferred because it gives roots time to establish before the following summer's bloom. Prepare the soil by digging in grit or sharp sand if drainage is questionable, especially on heavy clay. Avoid adding rich compost or manure, which can encourage rot and soft growth. Dig a shallow hole or scrape, then create a small mound of soil in the centre. Place the rhizome horizontally on top of the mound with the roots spread downwards and outwards. The top of the rhizome should sit at or just above soil level—never bury it completely. This exposure to sun and air helps prevent fungal disease. Space rhizomes 38 cm apart to allow for their eventual spread of 30–50 cm. Firm the soil gently around the roots, then water in lightly. Do not overwater; bearded iris prefers dryish conditions once established. No mulch is needed over the rhizome itself, though you can mulch between plants to suppress weeds. In exposed sites, newly planted rhizomes may need a temporary stake or stone to anchor them until roots take hold.