Iris latifolia is a bulbous flowering perennial plant belonging to the iris family, Iridaceae. I. latifolia is endemic to Spain and France and is commonly called English iris. The leaves grow up to 2 feet long and are dark green to teal colored and sword-shaped. I. latifolia produces two to three sets of flowers that contain yellow markings surrounded by white in the center of each vibrant blue colored petals. Flowers bloom in late spring to early summer and can reach up to 5 inches in diameter. Iris latifolia is commonly grown as an ornamental plant for its showy deep blue to violet flowers. Ideal growing conditions for this plant include full sun to partial shade and moist, yet well-draining soil. Water adequately when the soil appears dry and allow the soil to partially dry out before watering again. USDA plant hardiness zones 5a to 8a.
Iris latifolia seeds require a period of cold stratification to germinate reliably. Place the seeds in a ziplock bag with a small amount of moist, but not soaking wet, sterile substrate (i.e. sand, perlite, vermiculite, peat moss, or even a paper towel). Place the ziplock bag inside the refrigerator for 1 to 2 months prior to planting. After the period of cold stratification, sow seeds ⅛ inch deep in a moist, but well-draining potting mixture. Sown seeds require consistent moisture to germinate, but the soil should not remain soaking wet. Soil should be moist and well-draining with a neutral pH. Seeds should be kept between 65°F to 70°F. Germination typically takes 3 to 4 weeks to occur. Even with optimal conditions, germination may be slow and sporadic.
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