Lupin is a legume plant that can be either perennial or annual. It is distinguished by its high drought resistance and ability to grow even in desert conditions. In decorative landscape design, lupin is valued for its bright flowers and compact growth: plant height typically ranges from 50 to 120 cm, while inflorescences reach about 35–40 cm.
For successful cultivation, it is important to maintain optimal climatic conditions. Seeds germinate at temperatures of +15–16 °C (minimum germination temperature is +4–6 °C), but growth stops if the temperature drops below +10 °C. Vegetative propagation is possible through cuttings, while seeds are sown in spring (April) or in autumn (October–November). The distance between plants is typically 30–50 cm.
Lupin prefers sunny and non-acidic areas. Acidic soils can be corrected with wood ash or liming, although the plant is quite undemanding regarding soil quality – it is capable of absorbing even difficult-to-access mineral compounds at depths of more than two meters. Irrigation is necessary, especially at the beginning of vegetation, but lupin does not tolerate waterlogging. Care includes soil loosening, weed removal, and, if desired, fertilization. In case of disease, the plant is cut off at the root.
Flowering lasts 20–30 days, typically from June to September, and in some varieties, the inflorescence height can reach up to 70 cm. Flowers do not exude nectar but are rich in pollen, making lupin a valuable source of nutrition for bees. Thanks to its high nitrogen-fixing ability and frost resistance (withstanding frosts down to -6 to -8 °C), lupin is often used as a cover crop and green fertilizer in the agricultural sector.
