Prunella, also known as common black horehound, is a perennial plant reaching a height of 25 to 60 cm. It is characterized by creeping rhizomes and upright stems with oval leaves, sometimes with small teeth along the edges. Prunella's flowers are large, dark pink or purple, arranged in spike-like inflorescences, measuring up to 3-5 cm. Flowering lasts from June to August, allowing the plant to decorate the landscape throughout the summer. Prunella spreads quickly, forming a dense green carpet, and can reach up to 120 cm in width.
This plant is low-maintenance and prefers fertile loamy or clay soils with neutral acidity (pH 6-7.5). It grows well in full sun or partial shade, requiring moderate but regular watering to prevent soil from drying out. Prunella is highly cold-hardy and can withstand frosts down to -28°C. To maintain its decorative appearance and extend the flowering period, it is recommended to remove spent flower heads and perform autumn pruning, cutting back the plant by one-third or half.
In addition to its ornamental qualities, prunella is widely used in folk medicine due to its anti-inflammatory, antibacterial, antihistamine, and antifungal properties. The plant is used to treat colds and to stop bleeding. Prunella can be propagated both by seeds and by dividing the clumps, making it easy to cultivate under various conditions. However, due to its aggressive growth, its spread should be limited to avoid displacing other plants.
