Photo de Lin Rubrum. Ses fleurs rouge sang, au bel éclat satiné, illuminent les plates-bandes du début de l'été jusqu'à l'automne. La couleur caractéristique est : rouge écarlate. Le visuel permet d'observer les contours, les teintes et la disposition des éléments présentés. Les détails de forme et les contrastes donnent un aperçu de l'apparence de cette plante ou de sa récolte.
Non-organic seeds, Treated seeds, coated seeds Linaceae

Ornamental flowers seeds

Rubrum flax

Linum grandiflorum

Product code : 61-1046-010

Rubrum flax has confirmed characteristics that help you plan its placement and cultivation. Rubrum flax is an ornamental flowers variety offered as seed for gardeners who want clear, practical product information. Confirmed details include maturity:, height: 40 cm, spread: 30 cm, colour: red écarlate. The packet contains approximately 150 bare seeds, and the formulation is non-organic seeds, treated seeds, coated seeds. For best results, follow the sowing, light, and spacing information associated with this variety. You can adjust care to your soil, weather, and observed growth without exceeding the plant’s actual needs. Rubrum It is one of the easiest, showiest and most beautiful annuals.
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Detailed plant guide
Advice adapted to Canada
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Quantity
Approximately 150 bare seeds per packet
Exposure
Full sun
Life cycle
Annual

Discover the plant

Common nameRubrum flax
FamilyLinaceae
GenusLinum
Speciesgrandiflorum
CultivarRubrum
TypeNon-organic seeds, Treated seeds, coated seeds
Botanical nameLinum grandiflorum

Rubrum flax (Linum grandiflorum) Rubrum flax is an ornamental flowers variety offered as seed for gardeners who want clear, practical product information. Confirmed details include maturity:, height: 40 cm, spread: 30 cm, colour: red écarlate. You can adjust care to your soil, weather, and observed growth without exceeding the plant’s actual needs. Rubrum It is one of the easiest, showiest and most beautiful annuals. Brilliant blood-red flowers, with a beautiful satin sheen, are flowering from early summer to fall. Good air movement and spacing that follows the product information support steady development throughout the growing season.

The packet contains approximately 150 bare seeds, and the formulation is non-organic seeds, treated seeds, coated seeds. For best results, follow the sowing, light, and spacing information associated with this variety. They can be sown indoors or, directly where they are to flower, in the spring. They prefer a light well-drained soil and a sunny position. It is best to adapt care to your garden’s microclimate instead of following a fixed watering schedule in every situation. A suitable mulch can help stabilize moisture, reduce soil splash, and limit competition from weeds around established plants.

Measured care based on the plant’s condition generally supports better balance than unnecessary routine treatments. For containers, drainage and soil volume directly influence moisture stability around the roots and the frequency of watering. In the garden, an accessible position makes observation, occasional watering, harvesting, and timely maintenance easier. It is recommended to remove only damaged material while retaining healthy foliage needed for continued growth. Results may vary with weather, sowing date, soil quality, and the number of hours of useful light each day. This approach helps gardeners enjoy the variety’s confirmed qualities without adding more maintenance than the plant requires.

Photo de Lin Rubrum. Ses fleurs rouge sang, au bel éclat satiné, illuminent les plates-bandes du début de l'été jusqu'à l'automne. La couleur caractéristique est : rouge écarlate. Le visuel permet d'observer les contours, les teintes et la disposition des éléments présentés. Les détails de forme et les contrastes donnent un aperçu de l'apparence de cette plante ou de sa récolte.

Sowing guide

It all startswith a seed.

Sowing depth

Very shallow, approximately 3 to 5 mm

Spacing / density

Thin and space plants approximately 20 to 30 cm apart

Germination temperature

15 to 18°C

Germination time

14 to 21 days according to W.H. Perron

Sowing period

Indoors three weeks before final frost or direct sow outdoors after the last frosts

Propagation

Seed

Growing method

For best results with Rubrum flax, follow the confirmed sowing information and observe growth at each stage. Rubrum flax is an ornamental flowers variety offered as seed for gardeners who want clear, practical product information. Confirmed details include maturity:, height: 40 cm, spread: 30 cm, colour: red écarlate. The packet contains approximately 150 bare seeds, and the formulation is non-organic seeds, treated seeds, coated seeds. For best results, follow the sowing, light, and spacing information associated with this variety. You can adjust care to your soil, weather, and observed growth without exceeding the plant’s actual needs. Rubrum It is one of the easiest, showiest and most beautiful annuals. Brilliant blood-red flowers, with a beautiful satin sheen, are flowering from early summer to fall. They can be sown indoors or, directly where they are to flower, in the spring. They prefer a light well-drained soil and a sunny position. Gradual hardening helps reduce transplant stress when seedlings have been started indoors before moving into the garden. The information printed on the packet remains the reference for depth, temperature, and timing associated with this seed lot. It is best to adapt care to your garden’s microclimate instead of following a fixed watering schedule in every situation.

Soil and care

The right care,at the right time.

Soil pH

Slightly acidic to neutral, approximately 6.0 to 7.5

Minimum temperature

Sensitive to hard frost

Care level

Easy

Watering

For Rubrum flax, check soil moisture before watering and adjust frequency to weather and observed growth. Rubrum flax is an ornamental flowers variety offered as seed for gardeners who want clear, practical product information. Confirmed details include maturity:, height: 40 cm, spread: 30 cm, colour: red écarlate. The packet contains approximately 150 bare seeds, and the formulation is non-organic seeds, treated seeds, coated seeds.

Soil type

This variety prefers soil or growing medium that follows the drainage and texture information published for Rubrum flax. Rubrum flax is an ornamental flowers variety offered as seed for gardeners who want clear, practical product information. Confirmed details include maturity:, height: 40 cm, spread: 30 cm, colour: red écarlate. The packet contains approximately 150 bare seeds, and the formulation is non-organic seeds, treated seeds, coated seeds.

Fertilization

Fertilization for Rubrum flax can remain moderate and be adjusted to soil fertility and observed vigour. Rubrum flax is an ornamental flowers variety offered as seed for gardeners who want clear, practical product information. Confirmed details include maturity:, height: 40 cm, spread: 30 cm, colour: red écarlate. The packet contains approximately 150 bare seeds, and the formulation is non-organic seeds, treated seeds, coated seeds.

Moisture

Consistent without saturation

Seasonal care

Seasonal care for Rubrum flax relies on regular observation, measured intervention, and respect for its growth cycle. Rubrum flax is an ornamental flowers variety offered as seed for gardeners who want clear, practical product information. Confirmed details include maturity:, height: 40 cm, spread: 30 cm, colour: red écarlate. The packet contains approximately 150 bare seeds, and the formulation is non-organic seeds, treated seeds, coated seeds. For best results, follow the sowing, light, and spacing information associated with this variety. You can adjust care to your soil, weather, and observed growth without exceeding the plant’s actual needs. Rubrum It is one of the easiest, showiest and most beautiful annuals. Brilliant blood-red flowers, with a beautiful satin sheen, are flowering from early summer to fall. They can be sown indoors or, directly where they are to flower, in the spring. They prefer a light well-drained soil and a sunny position. Gradual hardening helps reduce transplant stress when seedlings have been started indoors before moving into the garden. The information printed on the packet remains the reference for depth, temperature, and timing associated with this seed lot. It is best to adapt care to your garden’s microclimate instead of following a fixed watering schedule in every situation. A suitable mulch can help stabilize moisture, reduce soil splash, and limit competition from weeds around established plants.

Container growing

A garden,within reach.

Recommended pot size

Pot at least 20 to 25 cm wide with excellent drainage
Rubrum flax can be considered for a container when volume, drainage, and light match the expected growth. Rubrum flax is an ornamental flowers variety offered as seed for gardeners who want clear, practical product information. Confirmed details include maturity:, height: 40 cm, spread: 30 cm, colour: red écarlate. The packet contains approximately 150 bare seeds, and the formulation is non-organic seeds, treated seeds, coated seeds. For best results, follow the sowing, light, and spacing information associated with this variety. You can adjust care to your soil, weather, and observed growth without exceeding the plant’s actual needs. Rubrum It is one of the easiest, showiest and most beautiful annuals. Brilliant blood-red flowers, with a beautiful satin sheen, are flowering from early summer to fall. They can be sown indoors or, directly where they are to flower, in the spring. They prefer a light well-drained soil and a sunny position. Gradual hardening helps reduce transplant stress when seedlings have been started indoors before moving into the garden. The information printed on the packet remains the reference for depth, temperature, and timing associated with this seed lot. It is best to adapt care to your garden’s microclimate instead of following a fixed watering schedule in every situation.
Photo de Lin Rubrum. Ses fleurs rouge sang, au bel éclat satiné, illuminent les plates-bandes du début de l'été jusqu'à l'automne. La couleur caractéristique est : rouge écarlate. Le visuel permet d'observer les contours, les teintes et la disposition des éléments présentés. Les détails de forme et les contrastes donnent un aperçu de l'apparence de cette plante ou de sa récolte.

Bloom and dimensions

Its place,in your garden.

Mature height

40 cm (15.7 in)

Width / spread

30 cm (11.8 in)

Flower color

Blood red to scarlet with a satin sheen

Foliage color

Medium green

Foliage type

Small narrow leaves on fine stems

Growth rate

Fast; maturity in 6 to 8 weeks

Growth habit

Light, upright, and branched

Fragrance

No notable fragrance confirmed

Bloom period

Flowering of Rubrum flax can be appreciated according to the timing, colour, and garden role described for this variety. Rubrum flax is an ornamental flowers variety offered as seed for gardeners who want clear, practical product information. Confirmed details include maturity:, height: 40 cm, spread: 30 cm, colour: red écarlate. The packet contains approximately 150 bare seeds, and the formulation is non-organic seeds, treated seeds, coated seeds.

Days to maturity

6 to 8 weeks according to W.H. Perron
Photo de Lin Rubrum. Ses fleurs rouge sang, au bel éclat satiné, illuminent les plates-bandes du début de l'été jusqu'à l'automne. La couleur caractéristique est : rouge écarlate. Le visuel permet d'observer les contours, les teintes et la disposition des éléments présentés. Les détails de forme et les contrastes donnent un aperçu de l'apparence de cette plante ou de sa récolte.

Garden associations

In goodcompany.

Companion plants

Published companion information for Rubrum flax includes Ses fleurs rouge sang brillantes au reflet satiné se succèdent du début de l’été jusqu’à l’automne sur une annuelle facile. Rubrum flax is an ornamental flowers variety offered as seed for gardeners who want clear, practical product information. Confirmed details include maturity:, height: 40 cm, spread: 30 cm, colour: red écarlate. The packet contains approximately 150 bare seeds, and the formulation is non-organic seeds, treated seeds, coated seeds. For best results, follow the sowing, light, and spacing information associated with this variety.

Frequently asked questions

Your questions,answered.

What exactly is in a Rubrum flax packet?
The W.H. Perron packet, code 61-1046-010, contains approximately 150 bare Linum grandiflorum Rubrum seeds. They are non-organic, and no coating or other treatment is stated, so semences_biologique is FALSE. semence_patrimoine is FALSE and semence_reproductible is TRUE because the product is not presented as an F1 hybrid. Harvest capsules only when dry if seed saving is desired, then store labelled seed cool and dry. The stated count remains approximate, and offspring may vary after pollination with other flax plants grown nearby. The stated count remains approximate; count received seeds only when planning requires absolute precision. before beginning your planned sowing session.
How should the small Rubrum flax seeds be sown?
Sow approximately three weeks before final frost or direct sow outdoors after the last ground frosts. Distribute seed over premoistened porous medium, press for good contact, and cover very lightly by 3 to 5 mm. stratification and scarification are FALSE: no chilling, soaking, or abrasion is required. Maintain 15–18°C and steady moisture without saturation; W.H. Perron lists germination in 14 to 21 days. After emergence, provide strong light and airflow, and thin with scissors to avoid pulling the roots of retained seedlings. Label the tray with its sowing date to track emergence accurately. Water from below when practical so the fine seeds are not displaced at the surface.
How should Rubrum flax be watered?
Before watering Rubrum flax, check the growing medium and foliage so frequency reflects current conditions. Rubrum flax is an ornamental flowers variety offered as seed for gardeners who want clear, practical product information. Confirmed details include maturity:, height: 40 cm, spread: 30 cm, colour: red écarlate. The packet contains approximately 150 bare seeds, and the formulation is non-organic seeds, treated seeds, coated seeds. For best results, follow the sowing, light, and spacing information associated with this variety. You can adjust care to your soil, weather, and observed growth without exceeding the plant’s actual needs. Rubrum It is one of the easiest, showiest and most beautiful annuals.
How can the satin-red flowering season be extended?
Group several plants in full sun so their short-lived flowers replace one another visually. Remove faded blooms and some developing capsules regularly to redirect energy toward new buds, while leaving several capsules when seed saving is desired. Water when the surface dries during hot periods without keeping soil constantly wet. W.H. Perron describes flowering from early summer into autumn and lists July through September in its table. Extreme heat or insufficient light may shorten each flush, while successive sowings can extend the overall display. Avoid heavy feeding because excessive growth may lodge. Photograph successive flushes to document the actual flowering duration in your climate.
Are Rubrum flax seeds edible or safe for pets?
No. This listing concerns ornamental Linum grandiflorum Rubrum, not a certified food flax product. North Carolina Extension reports cyanogenic glycosides in the seeds and low-severity human toxicity, so toxicite is TRUE, comestible is FALSE, and pet_friendly is FALSE. Do not eat seeds or capsules or use them in cooking. Keep packets and saved seed away from children and pets. After suspected ingestion or mouth or throat irritation, promptly contact poison control, a veterinarian, or a health professional. Retain the packet so the exact species can be identified. Never use saved seeds as food, supplements, tea, or decorative garnish. under any circumstances.

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