blue flag

Blue flag (Iris versicolor) plants should be watered once or twice each week, depending on the weather. During dry spells, or if the soil has become dry around the roots, it will need more frequent watering. The best way to tell if the blue flag needs water is to stick your finger into the soil around the plant; if it is dry, then it probably needs water. When watering, make sure to give the plant enough water so that it reaches the bottom of the root system. It is recommended that approximately 1 inch of water should be applied each time. Watering should be done in the morning so that the leaves have time to dry out before nightfall.

Iris versicolor, also known as the blue flag, does best in full sun. This species should receive at least 8 hours of full sun per day for optimal growth and flowering. During the heat of the summer, partial shade can be beneficial in areas with hot temperatures. The blue flag should not be planted in shady areas, as it will not flower and become spindly.

Pruning for Iris versicolor (blue flag) should be done in the late winter or early spring. Prune these plants by cutting away dead or damaged foliage and stems. Trim away any stems that have lost their leaves or have significant tip die back. Cut back any remaining stems to 8-10 inches above the crown of the plant. Be sure to make clean cuts and to remove any dead material, as it may provide a pathway for disease. Also avoid pruning off too much of the foliage, as this can reduce the plant’s vigor and prevent it from flowering.