Woad or dyer's woad, or glastum / Isatis tinctoria - a kind of flowering biennial plants with erect stiffly pubescent shoots, simple leaves and small yellow flowers collected in a rare paniculate inflorescence, a good honey plant. The plant is able to exert antibacterial, antiseptic, antimicrobial action, has antibiotic and antiviral properties.
Blooms profusely from the second decade of May to mid-June (25–30 days). It grows in one place for 3-4 years. Flowers provide bees with nectar and pollen.
In the first year, dyer's woad forms a rosette of leaves, in the second year it blooms and bears fruit. During the flowering period, it is actively visited by bees. Therefore, it must be used as widely as possible in the honey conveyor.
The variety is cold-resistant, has a fast regrowth in the spring and good aftertaste, is highly productive.
Biennial herbaceous plant dyer's woad of the cabbage (cruciferous) family, 60-120 cm high. Basal leaves are oblong-lanceolate, hairy, entire; middle and upper - linear. The flowers are bisexual, with a double perianth, 4-separate, yellow, collected in rare paniculate inflorescences on the main and lateral branches. The flower has 6 stamens.
The recommended sowing rate is 50-60 grams per hundred square meters of land.
The name can be pronounced as Usma.
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