Dark mullein (Verbascum nigrum)
Care, watering, light and tips for Dark mullein on Floravia.
Quick facts
- Family: Scrophulariaceae
- Difficulty: Easy to care for
- Watering: every 7 days
- Light: Partial shade
- Temperature: 10–30 °C
About Dark mullein
Verbascum nigrum, commonly known as Black Mullein, is a robust perennial plant from the Scrophulariaceae family, prized for its tall, striking flower spikes of bright yellow with purple centers. Reaching heights of up to 1.2 meters, it provides a dramatic vertical accent in garden borders, naturalized meadows, or cottage garden settings. Its large, velvety basal leaves form an attractive rosette that complements its summer bloom.
Native range
Europe and temperate Asia
Care tips
It prefers full sun to light partial shade and well-drained soils, even poor or calcareous ones, making it highly adaptable and low-maintenance. Watering should be moderate, allowing the substrate to dry out between waterings, as it is drought-tolerant once established. To prolong flowering, it's recommended to deadhead spent flower spikes, though not strictly necessary. Avoid waterlogging, as this can lead to root rot.
How to save a dying Dark mullein
- Warning signs
- Yellowish and soft basal leaves with a dark stem; or general wilting and drying of leaves without apparent cause.
- First aid
- Check drainage and substrate moisture. If waterlogged, carefully remove, trim rotten roots, and repot in dry, well-draining soil. If dry, water gradually.
- What kills it
- Excessive moisture and waterlogging are its worst enemies, rotting its roots. Also, transplanting during flowering or lack of sun.
- Can it be saved?
- Yes, if you act quickly. It's hardy but doesn't tolerate constantly wet soil. With good drainage and sun exposure, it will recover.