Red Flax. Linum grandiflorum var. rubrum, Flax Family ( Linaceae ), Red Flax. Also called: Scarlet Flax, Flowering Flax, Linum coccineum, Adenolinum grandiflorum, Linum coccineum, Linum grandiflorum. We wish to thank Wikipedia, the free encyclopedia for some of the information on this page. We share images and information with Wikipedia. Linum grandiflorum (syn. L. coccineum) is a species of flax known by several common names, including red flax, scarlet flax, and crimson flax. It is native to Algeria, but it is known elsewhere in Northern Africa, Southern Europe and in several locations in North America as an introduced species. Linum grandiflorum var. rubrum is a ultra-hardy, annual which blooms during Mid March - April. Each solitary red - scarlet bloom only lasts about a day, but new blooms are often produced with foliage about a foot high. Red Flax is heat & drought tolerant and does well in full sun. It has heat limits & will need watering to make it through the summer. Quick Notes: Height: Up to about 3 - 12 inches high. Flowers: Rounded flowers with five separate petals that curve outward, about an inch and a half across, with a bright crimson color and a deeper center leading to a solid black eye. Flowering Time: In Arizona they bloom Mid March - April in warm areas. Other areas not until November. Leaves: Tall, thin stems with narrow leaves, all in a glaucous greyish-green. Found: Native of Algeria. The USDA claims it is native of the USA (CA, CO, FL, KY, NE, NY, OH, TX, UT). Hardiness: USDA Zone 5a: to -28.8 �C (-20 �F) USDA Zone 5b: to -26.1 �C (-15 �F) USDA Zone 6a: to -23.3 �C (-10 �F) USDA Zone 6b: to -20.5 �C (-5 �F) USDA Zone 7a: to -17.7 �C (0 �F) USDA Zone 7b: to -14.9 �C (5 �F) USDA Zone 8a: to -12.2 �C (10 �F) USDA Zone 8b: to -9.4 �C (15 �F) USDA Zone 9a: to -6.6 �C (20 �F) USDA Zone 9b: to -3.8 �C (25 �F) USDA Zone 10a: to -1.1 �C (30 �F) USDA Zone 10b: to 1.7 �C (35 �F) USDA Zone 11: above 4.5 �C (40 �F) Soil pH requirements: 6.1 to 6.5 (mildly acidic) 6.6 to 7.5 (neutral) 7.6 to 7.8 (mildly alkaline) 7.9 to 8.5 (alkaline) 8.6 to 9.0 (strongly alkaline) Sun Exposure: Sun to Partial Shade Light Shade Elevation: 0 - 5,300 feet. Habitat: Well drained sandy desert soils, slopes, mesas, and disturbed rocky soil. Miscellaneous: Great xeriscape plant. Flowering Photos Taken March 20, 2008. Phoenix Desert Botanical Garden.

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