Linum grandiflorum. This annual flowering flax grows to only 50cm (20") tall, with cup-shaped flowers appearing in red, white, salmon, and lilac throughout the season. The real trick with Linum is to direct sow the seeds multiple times for an extended bloom period. Sow Linum Charmer Mix at two week intervals from mid-March to the end of May for a full summer of brightly coloured flowers. This mix looks great in containers, but even better in mass plantings. Linum grandiflorum is native to Algeria and some other parts of north Africa, and is relatively drought resistant. Water regularly if growing in containers.
The Linum species we offer are annual flowering flax. They are beautiful and easy and suitable for large containers. Linum grandiflorum is native to Algeria. Linum usitatissimum is thought to be native to central Asia. All species are attractive to pollinators and other beneficial insects. Continue reading below for tips on how to grow Linum from seed.
Season & Zone
Exposure: Full sun
Direct sow after last frost date. Sow more seeds every two to three weeks for successive blooming. If starting seeds indoors is absolutely necessary, use peat pots and harden off seedlings carefully to avoid transplant shock.
Sow seeds by barely covering them to a depth of 5mm (1/8″). Seeds germinate in 20 to 25 days. Thin seedlings to 15cm (6″) apart.
Cut back about half of the flowering stems in early summer to extend the blooming period. Grow in any well-drained soil with a pH range of 5.0 to 7.0 and avoid fertilizer and manure. Rich soil reduces blooming. Linum dislikes root disturbance, so it is not suitable for transplanting – it’s better to simply sow more seeds.
Linum grandiflorum is harmful if eaten, but the seeds of L. usitatissimum can be quite nutritious.