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Blue Flax (Linum perenne) is a graceful, fine-textured perennial (often grown as an annual) with sky-blue flowers, growing 12–24 inches (30–60 cm) tall and blooming from late spring through summer; it is well suited for borders, wildflower gardens, meadows, and containers
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Seeds can be direct sown outdoors after the last frost; in mild climates they may also be sown in early spring or fall; Blue flax develops a taproot and does not transplant well, so direct sowing is recommended
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Prefers light, well-draining soil and adapts well to sandy or poor soils; soil pH should be neutral to slightly alkaline
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To sow, loosen the soil surface, scatter seeds evenly, cover lightly with about ⅛ inch (3 mm) of soil, and water gently; thin seedlings to 6–12 inches (15–30 cm) apart
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Requires full sun for best flowering, though it can tolerate light partial shade with reduced bloom
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Keep soil lightly moist during germination; once established, Blue flax is drought tolerant and performs best with minimal watering; excessive moisture can cause weak growth or root rot
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Seeds typically germinate in 10–20 days at an ideal temperature of 60–70°F (15–21°C)
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Fertilization is rarely needed; if soil is extremely poor, apply a very light, balanced fertilizer, as too much fertility promotes leafy growth at the expense of flowers
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Blue flax is generally pest- and disease-free; occasional aphids may appear and can be removed with water spray; poor drainage may lead to root rot
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Suitable for deep containers with excellent drainage; allowing some flowers to mature will encourage self-seeding and natural reseeding in the garden
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