Species perennial flax
blue flowers with yellow centers, white stamens, green stems, and leaves

perennial flax

Linum perenne

Perennial flax (Linum perenne) is a hardy plant that produces attractive, bright blue flowers in late spring and summer. The stems reach about two feet in height and display multiple blossoms. Perennial flax grows well in sunny locations and requires consistent soil moisture, although its hardy constitution allows it to survive some dry periods. The plant is most popularly used in cottage gardens and is a wonderful addition with its striking floral display throughout the season. It also provides nice groundcover and adds a burst of color to landscapes.

Cycle:

Herbaceous Perennial

Watering:

Average

Propagation:

Division,Seed Propagation,Cutting,Layering Propagation

Hardiness Zone:

5 - 8

Flowers:

Sky blue Flowers

Sun:

Full sun,part shade

Leaf:

Yes

Leaf Color:

green

Growth Rate:

Low

Maintenance:

Moderate

Drought Tolerant:

Yes

Salt Tolerant:

Yes

Care Level:

Low

watering

Perennial flax (Linum perenne) is a drought-tolerant species that requires deep, infrequent watering. During more active growth periods, water should be applied as needed to ensure the soil stays evenly moist. Aim to water the plant deeply once every 1-2 weeks. To ensure you are providing enough moisture, check the soil 8-10 inches below the surface. If the soil is dry, water until it begins to trickle out of the pot's drainage hole. During hotter weather, more frequent watering may be necessary. In winter, provide only enough watering to keep the soil from drying out completely and stop if the foliage begins to wilt.

sunlight

Perennial flax (Linum perenne) thrives in full sunlight and should receive at least 6 to 8 hours of direct sunlight every day for optimal growth. It is important to note that direct sunlight must be present for at least 4 to 5 hours during the late morning and early afternoon for photosynthesis to occur. During cloudy days, or in cloudy climates, more hours of sunlight may be needed to ensure ample nutrient and energy production for the plant. Additionally, due to the plant’s need for high levels of sunlight, it is not recommended for cultivation in shaded or partially shaded areas.

pruning

Perennial flax (Linum perenne) should be pruned every year in early spring, just before new growth begins to emerge. Pruning should consist of cutting back any dead or diseased stems and any long shoots growing away from the center of the plant, and can also include removing faded flowers. Pruning back to just the first set of leaves on the stem usually provides ample regrowth. Be sure to use a sharp pair of pruning shears in order to ensure a clean cut and to minimize damage to the plant.

Season

Fall
Winter
Spring
Summer
Sep
Oct
Nov
Dec
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Starts Flowering

Perennial flax typically starts flowering in June.

Hardiness Map