PlantFun
Plant Needs
Sunlight
Full sun exposure required for abundant flowering; tolerates partial sun in hot, arid climates to prevent leaf scorch.
Watering
Water deeply when the top 2–3 cm of soil is dry; avoid overwatering to prevent root rot, especially in poorly drained soils.
Temperature
Hardy to mild frosts; optimal growth at 15–22°C; protect from extreme heat exceeding 30°C to preserve blooms.
Characteristics
- Leaf: Narrow, linear, gray-green leaves arranged alternately along slender stems.
- Flower: Five-petaled, sky-blue (rarely white/pink) blooms opening in morning, fading by afternoon.
- Stem: Slender, branching green stems; annual varieties produce fibrous stalks for linen production.
Care Guide
Watering
Keep soil consistently moist during active growth and flowering
Fertilization
Diluted balanced liquid feed once every 2 weeks. Use low-nitrogen feed to promote bloom production over foliage growth.
Eggshell powder topdress：Sprinkle a thin layer of crushed, dried eggshell powder around the base of plants; avoid direct contact with foliage to prevent burn.Pruning
- Deadhead spent blooms regularly to encourage prolonged flowering.
- Cut back perennial flax varieties to ground level after first frost in fall to promote healthy spring regrowth.
- Remove yellowing or damaged foliage to improve air circulation and reduce disease risk.
Toxicity
Warning: this plant may be toxic.
Pets & Humans
Pets: ASPCA confirms no toxicity to cats.
Humans: No known toxicity to humans; seeds are edible when prepared properly.
Garden Uses & Culture
Culture: Symbolizes purity and domesticity; historically associated with linen textile production.
Usage: Ornamental garden plant; fibrous stalks for linen fabric; seeds for flaxseed oil and culinary use.
