Hardiness Zone: 3-9
Flower Color: Dark blue
Foliage type: Flat, linear, vein-less, upright, grass-like in appearance
Bloom time: June
Height: 27 inches
Spread: 24 inches
Light requirements: Full sun
Plant depth: 1 inch of soil over rhizome
See "Growing Tips" for more detailed instructions
Growing Tips and Instructions
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Upon receipt of your Siberian Iris, soak your rhizomes in water overnight. Plant your Siberian Iris deeper than other Iris, covering the rhizomes with one or two inches of soil. Space your plants two feet apart. Siberian Iris prefer acidic soil (pH 5.5 to 6.9).
Planting Siberian iris gardens is best done in a rich, fertile soil, however, Siberian iris will perform in lean or poor soils as well. Feed Siberian iris plants in spring with a nitrogen rich fertilizer and fertilize again when blooms are spent. Peat moss, compost, and humus all work as soil enhancers.
In northern states, Siberians do best in full sun, or at minimum six hours of sunshine. In hot southern areas, protection from the mid-day sun is often a requirement.
Good drainage is essential, as Siberians thrive in moist but not soggy conditions. Keep the soil consistently moist until the plants are established, about a year. They enjoy lots of moisture in spring, and will do best if given a minimum of one inch per week during the balance of the growing season, so plant them with other perennials, such as day lilies which also need constant moisture to keep doing their best. Water established plants regularly when drought conditions exist.