Tips and Tricks for Growing

 Irises thrive in full sun, so choose a location in your garden that receives at least six hours of direct sunlight per day. Ensure the soil is well-draining to prevent waterlogged roots, as excessive moisture can lead to root rot. Adequate air circulation around the plants is also important to prevent disease. 

Before planting irises, prepare the soil by loosening it with a garden fork or tiller. Irises prefer slightly acidic to neutral soil with a pH range of 6.0 to 7.0. Incorporate organic matter such as compost or well-rotted manure to improve soil structure and fertility. This will provide the irises with essential nutrients and promote healthy growth. 

When planting irises, ensure that the rhizomes (the thick, fleshy roots) are partially exposed and not completely buried. Dig a shallow hole and position the rhizome horizontally with the top exposed above the soil surface. Space multiple irises at least 12 to 18 inches apart to allow air circulation and prevent overcrowding. 

While irises are drought-tolerant once established, they still require regular watering during their active growth period. Water deeply but infrequently, providing about one inch of water per week. Avoid overhead watering, as wet foliage can increase the risk of disease. Consider using a drip irrigation system or soaker hose to deliver water directly to the root zone. 

To promote healthy growth and abundant blooms, fertilize your irises in early spring and after blooming. Use a balanced, slow-release fertilizer with a ratio of 10-10-10 or similar. Avoid high-nitrogen fertilizers, as they can encourage lush foliage at the expense of blooming. Follow the package instructions for application rates and avoid direct contact of the fertilizer with the rhizomes.   Here at the ranch I use 10-20-20 when I am using granulated fertilizer.  My favorite is Llama poo straight onto the beds in the fall.  If I am digging a bed we use well composted horse/llama/chicken manure from our farm to mix with the native loam/river bottom soil. 

Monitor your irises regularly for pests such as iris borers, aphids, and slugs. Remove any affected foliage or flowers and consider using organic pest control methods if necessary. Proper air circulation and avoiding overhead watering can help prevent fungal diseases like iris leaf spot and bacterial soft rot. If needed, treat with appropriate fungicides following the instructions on the label.