Verbascum prusianum Care
Verbascum prusianum
A biennial or short-lived perennial native to Turkey. In the first year it forms a rosette of leaves, and in the second year it sends up a tall stalk with yellow flowers. It likes plenty of sun and poor, well-drained soil; it sustains itself in the garden by dropping abundant seed.
Monthly care calendar
Timings are for a temperate Northern Hemisphere climate. In warmer areas tasks start earlier, in colder areas later; in the Southern Hemisphere shift them by six months.
- Watering: Not needed. The plant is dormant and winter rains are sufficient.
- General care: The leaf rosette offers a decorative look in winter as well. The biggest risk is base rot caused by excessively wet soil.
- Pests & diseases: Care must be taken against root rot.
- General care: The rosette plant prepares to wake up.
- Watering: Usually not needed. Only if newly germinated seedlings experience a dry spring, water 1-2 times a month.
- General care: In plants in their second year, the flower stalk begins to elongate. New seedlings develop their leaf rosette.
- General care: In plants in their second year, the flower stalk rises quickly.
- Watering: Not required; fully adapted to drought.
- Fertilizing: Absolutely do not fertilize; it causes weak and toppling flower stalks.
- Pruning: Regularly remove spent flowers at the base; this encourages new flowering.
- General care: Drainage is vital for this plant. In heavy, water-retaining soil, plant on a mound or bed raised 20-30 cm, and keep the root collar above the surrounding soil level.
- Pests & diseases: Avoid watering to prevent root rot.
- Watering: In a long drought, water deeply once a month.
- Pruning: Regularly remove spent flowers at the base; this encourages new flowering.
- General care: Flowering continues.
- Watering: In midsummer, deep watering every 15-20 days is enough. Established plants (over 2 years old) do not need watering in most years. Water so that the soil is wetted to a depth of 10-15 cm from the surface.
- Pruning: Regularly remove spent flowers at the base; this encourages new flowering.
- General care: Flowers fade and seeds begin to form. The main plant in its second year begins to complete its life cycle.
- Watering: In midsummer, deep watering every 15-20 days is enough. Established plants (over 2 years old) do not need watering in most years. Water so that the soil is wetted to a depth of 10-15 cm from the surface.
- Pruning: Regularly remove spent flowers at the base; this encourages new flowering.
- General care: The seeds ripen and drop around the plant.
- Watering: In a long drought, water deeply once a month.
- Fertilizing: Absolutely do not fertilize.
- Pruning: Regularly remove spent flowers at the base; this encourages new flowering.
- General care: This month, the garden holds two forms: plants that flower this year and complete their life cycle, and leaf rosettes that will flower next year. This is the best time for new seedlings to emerge.
- Watering: Not required; autumn rains are sufficient.
- Pruning: Remove withered stalks.
- General care: The newly emerging seedlings form winter-hardy leaf rosettes. The best time for planting.
- Pests & diseases: Make sure the soil does not stay wet all the time.
- General care: In winter rains, make sure water does not pool in the root zone; for this plant, drainage is more critical than irrigation.
- General care: The plant is dormant.
- Pests & diseases: Protect from standing water and waterlogged soil.
The care advice on this page is general and for information only; it is not professional advice. Plant age, soil and your garden’s microclimate can change the outcome. Plant protection products are mentioned only as general information; they are regulated, and the choice, dose and timing must be decided by a qualified professional under local rules. Consult a landscape architect or agronomist before applying.
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