5870- Flax, Brown. 2-2½ ‘ tall plants with nice blue flowers. Good yield of flax seeds. Direct seed outdoors, covering them 1/4- to 1/2-inch-deep. Water gently if the soil starts to dry out before germination, which takes about 10 days. Seedling flax plants quickly develop a good root system and need watering only if the weather is unusually warm, dry or windy.. In spring after the soil has warmed, direct seed into any well-drained soil. Cover seed very lightly with soil and keep moist until germination. Thin plants to 6” apart. Once established, can tolerate immense heat and extremely dry conditions.