Rose-white yarrow

For industrial production, farmers use either the transplant method or direct sowing in rows. Seeds should be sown at a shallow depth, as they require light for germination, so they are only slightly covered with substrate or rolled into the soil.

The recommended planting distance between rows is 45 to 60 centimeters. This provides sufficient space for the root system to develop and facilitates mechanical maintenance during the plant's growth cycle.

Seedlings emerge within 14–20 days under favorable conditions. During the first year, the plant focuses primarily on forming a basal leaf rosette and developing a strong root mass for successful survival.

Vegetative propagation by division is best done in April or September. This method ensures that all varietal characteristics of the parent plant are maintained and allows for a faster harvest starting from the second year.

This crop is sun-loving and drought-resistant, requiring open, well-lit fields for optimal growth. While it adapts well to poor soils, it performs best in light loamy or sandy soils with a neutral pH level.

Rose-white yarrow is highly winter-hardy and does not require special winter protection in temperate climates. However, it is sensitive to stagnant water, so planting in low-lying areas with high water tables should be strictly avoided.

The plant handles high summer temperatures well but requires moderate watering during the floral shoot formation phase. Adequate moisture at this stage is critical for achieving high-quality medicinal raw materials.

Proper soil aeration is crucial. Regular inter-row cultivation promotes root health and prevents the development of fungal diseases that are often triggered by excessive moisture in the root zone.

Excessive nitrogen fertilization is counterproductive, as it stimulates lush vegetative growth at the expense of secondary metabolites and essential oils concentrated in the flowers and leaves.

The main threats to the crop are fungal diseases, especially powdery mildew, which develops in conditions of high humidity or poor air circulation caused by overcrowding. Proper spacing is essential for plant health.

Common pests include aphids and leaf rollers, which can significantly damage leaves and buds, thereby lowering the commercial value and yield of the medicinal harvest.

Preventative measures include crop rotation and consistent weed control, as weeds often act as reservoirs for infection. Overcrowding should be avoided to prevent moisture buildup and mold development.

When dealing with pests, preference should be given to biological control methods. The use of harsh chemical insecticides is limited, as the yarrow is typically harvested for pharmaceutical and cosmetic purposes.

Sanitary pruning and the removal of plant debris in the fall are mandatory practices. This significantly reduces the infection load on the field and prevents the recurrence of diseases in the following spring.

Harvesting is performed during the full blooming phase when the concentration of essential oils and flavonoids is at its peak. This usually occurs between June and August, depending on the growing region.

The upper 20 centimeters of the stem, including the flower heads, are harvested. Work should be done in dry weather after the morning dew has evaporated to ensure the raw material stays fresh and clean.

Immediately after cutting, the raw material must be sent for drying. Shade-drying in well-ventilated areas or using specialized dryers at temperatures not exceeding +40 degrees Celsius is recommended.

Strict temperature control during drying is essential to prevent the degradation of bioactive components and the loss of essential oils. Properly dried material retains its natural color and distinct aroma.

Once dried, the raw material is cleaned of impurities and packaged in airtight containers. Under proper storage conditions, it retains its medicinal properties for up to two years, making it a highly profitable crop.