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Linum suffruticosum

Linum suffruticosum · Linaceae

The gardener's calendar

The right move for September

In autumn, ease off feeding and take the chance to clean up around linum suffruticosum and prepare for winter.

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ID card

Foliage
Evergreen, fine and linear
Flowering
May to July, blue or pink flowers depending on variety
Adult size
30 to 60 cm tall, compact and bushy habit
Growth
Moderate to fast
Hardiness
Hardy to around -15 °C
Origin
Mediterranean region and South-West Asia
Soil type
Well-drained, dry to fresh, low fertility requirements
Exposure
Full sun (minimum 6 hours per day)

Care

Watering

Flax sub-shrub is drought-tolerant once established. Water regularly during the first year to promote rooting, then gradually reduce. In summer, water moderately and let the substrate dry slightly between waterings. Avoid excess moisture which causes root rot.

Exposure and climate

Plant this specimen in full sun to obtain generous flowering and dense growth. It tolerates wind and dry Mediterranean air well. Protect it from prolonged frost in very cold regions by growing it in a pot that you can bring indoors, or by choosing a sheltered location.

Soil and drainage

Flax prefers light, well-drained and poor soil. Overly rich soil promotes foliage at the expense of flowering. Improve drainage with sand or gravel if your soil is heavy. Neutral to slightly alkaline pH is ideal.

Pruning and maintenance

Prune lightly after flowering (late July-August) to maintain compact growth and encourage branching. Remove dead or damaged wood in spring. Avoid severe pruning which weakens the plant; prefer regular and gentle cuts.

Fertilization

Flax sub-shrub is undemanding for fertilizer. A light annual application of compost in spring is generally sufficient. In containers, a balanced fertilizer diluted to low concentration at the start of flowering can boost flower production.

Pests and diseases

This plant is generally resistant to common pests and diseases if growing conditions are respected (good drainage, no stagnant moisture). Occasionally watch for spider mites in very dry and hot climates. Overexposure to humidity can promote leaf spots: improve air circulation.

Did you know?

The genus Linum contains over 200 species, including cultivated flax (Linum usitatissimum), a historical source of textile fibres and linseed oil since ancient Egypt. Flax sub-shrub is primarily valued for its delicate ornamental beauty and hardiness, particularly in dry and Mediterranean gardens. Its ephemeral flowers, which open in the morning and close in the afternoon, make it a plant full of charm.

Where to buy it

Best planted in autumn so the roots settle in before summer, or in early spring once the frost has passed. Pick a plant with healthy foliage and roots that are not exposed. Best time: March, October, November.

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Tips generated and checked by Viridia — adapt them to your local climate.