Blackstonia perfoliata
Blackstonia perfoliata · Gentianaceae
The gardener's calendar
Ideal time to plant blackstonia perfoliata: set it out when the soil is neither frozen nor waterlogged, and water generously as it establishes.
ID card
- Family
- Gentianaceae
- Type
- Annual or biennial herbaceous plant
- Flowering
- June to August
- Adult size
- 20 to 60 cm in height
- Foliage
- Deciduous, glaucous perfoliate leaves
- Hardiness
- Hardy, down to -15°C
- Origin
- Western and central Europe
- Soil type
- Well-drained, calcareous, poor to moderate
Care
Exposure and light
Choose a location in full sun or partial shade for optimal flowering. Yellow gentian thrives on sunny slopes and banks exposed to direct light. It tolerates airy and sunny situations well.
Soil type
This plant prefers calcareous, well-drained and rather poor soils. It adapts well to rocky or low-fertility soils. Winter moisture should be moderate to prevent root rot.
Watering
Water moderately during the growing period, keeping the soil slightly moist without excess. Reduce watering in winter. Once established, yellow gentian will tolerate short dry periods.
Fertilizing
No fertilizer is needed on naturally poor soil. Excess nutrients promote vegetation at the expense of flowering. Respect its character as a hardy and frugal plant.
Pruning and maintenance
Little pruning is required. Remove spent flowers to encourage longer flowering. After fruiting (if grown as a biennial), eliminate dried stems.
Diseases and pests
Very hardy and rarely affected by major diseases or pests. Stagnant moisture can promote root rot. Prefer well-aerated and drained situations to prevent any problems.
Did you know?
Yellow gentian fascinates with its strangely pierced (perfoliate) leaves, where the stem seems to pass through them completely. It has long been used in traditional herbalism in Europe, particularly for tonic infusions. Its delicate bright yellow flowers attract pollinators and make it a valuable asset for natural gardens and flowering slopes.
Where to buy it
Plant in spring or early autumn, avoiding spells of intense heat. Pick a plant with healthy foliage and roots that are not exposed. Best time: March, April, May, September.
Add this plant to my garden →Plants from the same family
- Marsh gentianGentiana pneumonanthe
- Yellow gentianGentiana lutea
- Field gentianGentianella campestris
- Willow gentianGentiana asclepiadea
- Spring gentianGentiana verna
- Centaurium pulchellumCentaurium pulchellum
Tips generated and checked by Viridia — adapt them to your local climate.