Monkshood (Aconitum ‘Bressingham Spire’)

Aconitum 'Bressingham Spire' is commonly called monkshood or monk's hood. It is a clump-forming herbaceous perennial grown for its upright spikes of violet-blue, hooded flowers.

Aconitum 'Bressingham Spire' typically grows about 29–35 inches tall and may spread roughly 18–23 inches. Its mature size can vary with soil moisture, light, and growing conditions.

Yes, Aconitum 'Bressingham Spire' is a hardy herbaceous perennial. Its foliage dies back after the growing season and returns from underground roots.

Aconitum 'Bressingham Spire' grows in full sun to partial shade. Partial shade is especially helpful in hot climates, provided the soil remains evenly moist.

Plant it in a cool, sheltered border with fertile, moisture-retentive but well-drained soil. Avoid locations that dry out quickly, such as beside thirsty tree roots.

It can tolerate afternoon sun when the soil stays consistently moist, but hot afternoon exposure may scorch foliage. In warm regions, give it morning sun or filtered afternoon shade.

It prefers fertile, humus-rich soil that holds moisture without becoming waterlogged. Loam, clay, sand, and soils ranging from acidic to alkaline can work if drainage and moisture are balanced.

Yes, it is considered a hardy perennial and can survive cold winters in many U.S. gardens. Exact performance depends on local winter temperatures, drainage, and whether the plant experiences summer drought.

Water it whenever the soil surface begins to dry, keeping the root zone evenly moist during active growth. Do not allow the plant to dry out, especially before and during flowering.

Wilting is most often caused by dry soil, heat stress, root disturbance, or a root problem from excessively wet conditions. Check soil moisture first and improve drainage if the soil remains saturated.

It usually needs only fertile soil and an annual layer of compost or well-rotted organic matter. Avoid heavy feeding, which can encourage soft growth rather than sturdy flowering stems.

Usually not, because this selection is noted for strong stems and a relatively compact habit. Staking may still be useful in windy sites, very rich soil, or unusually wet conditions.

It is generally resistant to serious pest problems, but aphids can occur. Excess shade, poor air circulation, or wet foliage may contribute to powdery mildew, stem rot, or other fungal problems.

Plant it in spring or fall when the soil is workable and consistently moist. Fall planting is suitable in many U.S. regions, while spring is safer where winters are severe or soil remains frozen.

Set it at the same depth as it was growing in its container, then water thoroughly and keep the soil evenly moist while it establishes. Space plants about 18–24 inches apart to allow mature spread and airflow.

Yes, it can be grown in a large container with fertile, moisture-retentive, well-drained potting mix. Containers dry out faster than garden soil, so monitor moisture closely and protect the roots from extreme winter cold.

The most practical method is division in early spring or fall, although divisions may take time to re-establish. Wear protective gloves during all propagation because every part of the plant is toxic.

It can be propagated from seed, but seed-grown plants may be slow, variable, or difficult to establish compared with divisions. Division is generally preferred when maintaining the named cultivar.

Divide established plants in early spring or fall, with early spring often preferred for reliable recovery. Divide only when necessary because monkshood can be slow to re-establish after root disturbance.

Cut back the dead stems after flowering or once the foliage has died back in fall. Wear gloves and avoid bare-skin contact while handling the stems, leaves, or roots.

Yes, Aconitum 'Bressingham Spire' is highly toxic if eaten and may also cause harm through skin contact. Keep it away from children, pets, and livestock, and wear gloves when handling it.

Skin contact can be harmful, especially when handling sap, roots, or damaged plant tissue. Wear waterproof gloves, avoid touching your face, and wash exposed skin and tools after handling.

No, it should be treated as toxic to pets and livestock if eaten. Do not plant it where animals can browse, and contact a veterinarian or animal poison service immediately if ingestion is suspected.

Avoid it in areas where young children or animals may touch or chew plants, because monkshood is highly toxic. If grown, place it in a controlled location and clearly identify it for everyone who gardens there.

It generally blooms from mid to late summer into early fall, producing upright spikes of deep violet-blue, hooded flowers. Bloom timing varies with climate and growing conditions.

The flowers are deep violet-blue to blue-purple and are arranged on erect, tapering spikes. Their hooded shape gives monkshood its common name.

Yes, its flowers can provide nectar for bees and other pollinating insects. Place it where visitors can enjoy the flowers without needing to handle the plant.

Yes, the strong flowering stems can be used in arrangements. Handle cut stems with gloves, keep them away from food-preparation areas, and never ingest any plant material.