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Our Master Gardener Breaks Down Why Your Iris Isn't Blooming
By TIFFANY SELVEY
If your beautiful irises have healthy leaves but are still refusing to bloom, they may be experiencing problems related to the soil, growing conditions, or maintenance.
Try adding compost to the soil to ensure the irises get necessary nutrients, and be sure not to use too much fertilizer since overdoing it can restrict the flower from blooming.
Every variety has different planting needs, so do research. While some need to be planted underground with added mulch, others should be left partially exposed without mulch.
Additionally, some species, like desert-loving crested irises, require full sun and dry soil, while others are more tolerant of wet or well-draining soil types and partial shade.
Although irises are low maintenance, they do require upkeep and should be divided every three years or so to ensure the roots have enough space to get the resources they need.