RC 63664 K is an ultra-early sunflower variety characterized by a short vegetation period of 75 to 95 days depending on growing conditions. Plants reach a height of 140-185 cm, with height varying based on planting time: first planting — 175-185 cm, second summer planting — 140-150 cm. Sunflower heads have a diameter of 19-23 cm and a convex shape, with medium-sized, round, dark-gray seeds. The yield potential of this variety ranges from 28 to 45 centners per hectare, making it suitable for cultivation in various climatic zones, including steppe regions. The variety has high oil content in seeds — 46-48% — ensuring good oil extraction during processing. RC 63664 K is resistant to lodging and frost, and also exhibits resistance to six races of downy mildew, significantly reducing the risk of yield losses due to diseases. Seeds are treated with a three-component fungicide that protects plants from a broad spectrum of diseases, ensuring high germination energy and healthy seedling development. For ease of identification and management of plantings, seeds can be marked with special paint that does not affect plant growth and development. This enables accurate differentiation of sunflower varieties and hybrids during agricultural operations, contributing to optimized agronomic practices and increased cultivation efficiency.
