Black Knight Throatwort

Black Knight Throatwort (Trachelium caeruleum 'Black Knight')

Black Knight Throatwort (Trachelium caeruleum 'Black Knight'), also known as Black Knight, is a striking perennial known for its dense clusters of deep purple to blue flowers and dark, almost black stems. This plant adds a bold splash of color and texture to garden beds, borders, and containers. With its unique color and upright growth habit, Black Knight Throatwort serves as a captivating **focal point** in any garden.

Distinctive Features

Black Knight Throatwort features clusters of tubular, star-like flowers that are a deep purple-blue color, providing a vibrant contrast against the dark stems and rich green foliage. The plant has a sturdy, upright growth habit and a compact form, making it an excellent choice for creating vertical interest. Its bold flowers and dark stems make it a standout plant, ideal for adding drama and depth to garden beds or mixed plantings.

Growing Conditions

• Sun Exposure: Prefers full sun to partial shade. It thrives best in areas that receive at least 6 hours of sunlight each day for optimal blooming.


• Soil: Grows best in well-draining, moderately fertile soil. It performs well in sandy, loamy, or slightly acidic to neutral soils.


• Water: Water moderately, ensuring the soil remains evenly moist but well-drained. It does not tolerate soggy conditions, so avoid overwatering.


• Humidity: Prefers moderate humidity, making it suitable for a variety of garden environments.


• USDA Hardiness Zones: 7-9 (can be grown as an annual in cooler regions).

Ideal Uses

• Garden Beds: Adds vibrant color and texture to garden beds, where its bold flowers and dark stems create a striking contrast against other plants.


• Containers and Window Boxes: Perfect for containers and window boxes, where it can be showcased on patios, balconies, or porches.


• Border Planting: Ideal for creating colorful borders, where its upright growth and rich purple flowers add height and visual interest.


• Cut Flowers: The vibrant flowers make excellent cut flowers, lasting for weeks in floral arrangements.

Low Maintenance Care

Black Knight Throatwort is a relatively low-maintenance plant that thrives with moderate care. Its drought tolerance, ability to attract pollinators, and unique foliage make it a great addition to any garden.

• Watering: Water regularly, but allow the soil to dry slightly between waterings. Ensure good drainage to prevent root rot.


• Pruning: Remove spent flowers to encourage continuous blooming and maintain a neat appearance. Prune back dead stems in early spring to encourage fresh growth.


• Fertilizing: Fertilize lightly with a balanced, slow-release fertilizer in the spring to promote healthy growth and vibrant blooms.


• Winter Care: In cooler climates, treat it as an annual. In milder climates, it can be left outdoors year-round with minimal care.

Why Choose Black Knight Throatwort?

Black Knight Throatwort is an excellent choice for gardeners looking for a unique, low-maintenance plant that adds bold color and texture to their landscape. Its deep purple-blue flowers and dark stems make it perfect for adding contrast and visual interest to garden beds, borders, and containers.

• Vibrant Blooms: The rich purple-blue flowers create a stunning visual effect, making it a standout plant in any garden or container.


• Focal Point: With its bold flowers and dark stems, Black Knight Throatwort serves as a beautiful focal point in garden beds, containers, or hanging baskets.


• Low Maintenance: Once established, it requires minimal care, making it perfect for both beginner and experienced gardeners.


• Attractive to Pollinators: The flowers attract bees, butterflies, and hummingbirds, making it a great addition to any pollinator-friendly garden.

For a low-maintenance, visually striking plant that adds color, texture, and charm to your landscape, Black Knight Throatwort (Trachelium caeruleum 'Black Knight') is the perfect addition to your garden or container collection.