Diplomat flax is a late-maturing variety of flax designed for the production of flax fiber. The plant is characterized by a medium stem length and high resistance to lodging, ensuring crop stability. The vegetation period is about 80 days, with a 1000-seed weight reaching 5.5 grams. Fiber content in the plant is 29.5%, while long fiber yield is 24.8%, making this variety attractive to the textile industry. Relative breaking load of the fiber reaches 16.1 daN, indicating its strength. Flax straw yield in the recommended region is about 42 centners per hectare, and seeds yield 4 centners per hectare. During trials, strong infection by anthracnose was noted, along with weak infection by bacteriosis, polysporosis, and Fusarium wilt. Diplomat flax is well adapted to various soils, except acidic ones, and possesses high frost hardiness. The plant releases tannins that repel pests such as the Colorado beetle, making it useful not only for obtaining fiber but also as a green manure to improve soil structure and enrich it with organic matter. Growing flax as green manure contributes to improved soil fertility and protects vegetable crops such as potatoes, tomatoes, eggplants, and peppers. For sowing, seeds are scattered with a burial depth of about 2 cm, and the first seedlings appear within 1-2 weeks. Cutting is carried out during the budding period, before flowering, after which the green mass is incorporated into the soil two weeks before planting main crops. Additionally, flax seeds possess valuable nutritional properties containing proteins, fats, fiber, and phenolic compounds, making them beneficial for cardiovascular health, digestion, and women's health. However, when using flax seeds, contraindications such as pancreatitis, cholecystitis, gallstones, hypertension, and diabetes must be considered. It is important to store seeds correctly and adhere to recommended dosages when using them.