southern blue flag

Southern Blue Flag should be watered about twice a week. The soil should be kept moist but not waterlogged. Soggy soil can lead to root rot which can cause the plant to die. Once a month, if the soil has become dry, water until saturated. Make sure to not water the leaves, as this can cause the plant to become diseased. When watering, make sure to check to see how dry the soil is to prevent over or under watering.

Southern Blue Flag typically needs full sun - at least 8 hours per day - for optimal growth. More sun is generally beneficial, although the plant can tolerate partial shade. Avoiding overly hot spots will help prevent sunburn and leaf scorch. If growing in an area that receives hot afternoon sun, morning sunlight or filtered sunlight may be more appropriate. Southern Blue Flag is adapted to cooler environments and grows best in areas with mild summers.

Southern blue flag (Iris virginica) should be pruned annually in the late winter or early spring, before new growth appears. Pruning helps promote healthy, new growth, removes spent flower spikes, and helps control the shape and size of the plant. To prune correctly, use sharp, sterile pruning shears to cut free any overly involved foliage. Remove any dead foliage and cut off the spent flower spikes. Cut off the weak or straggling leaves and stems at their base, taking care not to damage the base of the plant. Once the pruning is finished, the plant should appear more compact and structured.