What kind of soil does Linum tenuifolium prefer?

It thrives in well-drained, sandy or gravelly soils.

Is this plant drought tolerant?

Yes, once established, it has good drought tolerance.

What is the flowering time?

It typically blooms in early to mid-summer.

Plant guide

Fairy Flax.

Linum tenuifolium

Pronounced LIH-num teh-NOO-ih-fol-ee-um

Fairy Flax is a charming, delicate perennial that forms a lovely cushion of fine, grassy foliage. It's known for its profusion of small, cheerful flowers that bloom throughout the summer. This plant is a great choice for rock gardens, borders, or containers where its airy texture can be fully appreciated.

At a glance

Care level: Easy
Plant type: Perennial flowering plant
Light: Full Sun
Indoor light: direct
Water: Every 7 to 14 days
Mature size: 0.5 meters tall and wide
Growth rate: medium
Hardiness: USDA 4 to 9
Bloom time: Late spring to early autumn

Care

Provide full sun and well-draining soil; avoid overwatering, especially in humid conditions. Deadhead spent blooms to encourage more flowers and maintain a tidy appearance. Cut back plants in late winter or early spring to promote fresh growth.

Watering: Water thoroughly when the top inch of soil feels dry; reduce watering in cooler months.
Feeding: Fertilize sparingly in spring with a balanced liquid fertilizer if desired, but it often thrives without it.
Pruning: Prune back stems in late winter or early spring to encourage new growth and shape the plant.
Repotting: Repot container-grown plants every 2-3 years in spring when rootbound, using a well-draining potting mix.
Soil: Well-draining, gritty, or sandy soil
Soil pH: Slightly acidic to neutral
Temperature: -20 to 30°C
Humidity: 20 to 50%

Safety

People: While not typically considered highly toxic, ingesting parts of this plant may cause mild stomach upset in some individuals.
Children: The plant itself poses no significant ingestion or handling risk for children, though it's always best to discourage eating unknown plants.
Contact allergens: The fine hairs on the stems and leaves could cause minor skin irritation for sensitive individuals.
Airborne allergens: Pollen production is generally low, so respiratory allergies are unlikely.
Edibility: This plant is not intended for human consumption.

How to identify it

Fine, linear, grey-green leaves
Small, five-petaled flowers
Upright, wiry stems
Forms a compact, mounding habit
Numerous flowers bloom at once

Height: 0.15 to 0.5m
Spread: 0.15 to 0.5m
Leaves: grey-green, green, evergreen
Flowers: blue, pink, white, 1 to 2cm

Growing it

Propagation: seed, division
When to plant: spring, autumn

Plant it in well-drained areas where it won't be overshadowed by larger, more vigorous plants.

Grows well with

Thyme — Thyme shares similar habitat preferences for well-drained soils and full sun, making them excellent companions.
Eroded Rockrose — This rockrose also enjoys dry, sunny conditions and rocky substrates, complementing the flax's needs.
Blue Fescue — The fine texture and blue-gray color of Blue Fescue provide a beautiful contrast to the delicate flowers and foliage of Linum tenuifolium.

Keep away from

Overly Watered Soil — Linum tenuifolium is susceptible to root rot if the soil remains consistently wet.
Aggressive Weeds — Vigorous weeds can easily outcompete this delicate flax for resources.

Similar species

Common Flax — Common flax is a much larger, cultivated species grown for its fiber and seeds, lacking the wild, delicate appearance of Linum tenuifolium.
Alpine Flax — While also a smaller flax, Linum alpinum often has slightly larger flowers and a more compact growth habit, typically found at higher altitudes.

Science

Family: Linaceae
Genus: Linum
Order: Malpighiales
Class: Magnoliopsida
Native range: Europe, particularly in alpine and subalpine regions.
Conservation: This species is not currently listed as endangered or of special concern.

It typically grows in open, sunny habitats like meadows, rocky slopes, and dry grasslands.

Uses: Ornamental

Through the year

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Flowering

Fruiting

Foliage

Ecological indicators

Salinity: 2/9
Soil reaction: 7/9
Light: 7/9
Temperature: 6/9
Moisture: 3/9
Nutrients: 4/9

Taxonomy resolved against GBIF.

Questions people ask

What kind of soil does Linum tenuifolium prefer?: It thrives in well-drained, sandy or gravelly soils.
Is this plant drought tolerant?: Yes, once established, it has good drought tolerance.
What is the flowering time?: It typically blooms in early to mid-summer.

Where the name comes from

The common name 'Slender Flax' comes from its delicate appearance and slender leaves. The scientific name, Linum tenuifolium, also reflects its slender foliage, with 'Linum' being the ancient Latin name for flax.

Good to know

The specific epithet 'tenuifolium' means 'slender-leaved', referring to its delicate foliage.
It prefers well-drained soils and can tolerate drier conditions once established.
This flax is a low-growing perennial, forming small clumps.

Is your fairy flax looking unwell?

This page is a general guide. Pocket Botanist diagnoses problems from a photo of your actual plant, works out watering for your light and conditions, and reminds you when care is due.

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This guide was generated with AI and checked against GBIF taxonomy. It is general information, not horticultural or veterinary advice. Read about how we build these guides.