Canna 'Le Roi Humbert' — Herbaceous perennial

Overview

Canna 'Le Roi Humbert' is a herbaceous perennial in the genus Canna, part of the Cannaceae family. Canna 'Le Roi Humbert' grows best in full sun, and tolerates rich and well-drained soil soils. Its UK hardiness is rated H5. Suggested uses include borders, containers and tropical-themed gardens.

About

Canna 'Le Roi Humbert' is an herbaceous perennial in the Cannaceae that provides a tropical, architectural presence with upright shoots and summer-to-autumn flowering. It favours full sun and reliably moist, rich, well-drained soil and carries blooms from July to October. Rated H5 (hardy), it suits borders, containers and tropical-themed garden schemes.

About the genus

Canna is a genus of flowering plants consisting of 10 species known as cannas or canna lilies. It is the only genus in the family Cannaceae. All of the genus's species are native to the American tropics and were naturalized in Europe, India and Africa in the 1860s.

Wikipedia contributors, "Canna (plant)", CC BY-SA 4.0 — Canna (plant)

In the garden

Canna 'Le Roi Humbert' sits within the Cannaceae and is grown for its vertical habit and long flowering season. Plants produce erect stems topped by blooms through the warmer months, extending interest from July to October in UK gardens. Position in full sun on a rich, moist but well-drained soil; improve heavy ground with organic matter to avoid waterlogging. The H5 rating means the variety is classed as hardy across much of the UK, but choose a sheltered spot in exposed sites. Maintain an even supply of moisture during the growing season to support sustained flowering and, where soil is poor, apply a balanced feed in spring. Use Canna 'Le Roi Humbert' at the back of mixed borders, as a specimen in a large container, or within tropical-themed planting where height and a summer-to-autumn display are required. In pots, keep the compost moist and move large containers to a frost-protected area in the coldest winters; place plants where the flowering stems can be seen from paths to make the most of the July to October display.

Growing conditions

Best soil and position for Canna

Sunlight: Full sun
Soil type: Rich, well-drained soil
Soil moisture: Moist
UK hardiness: H5

Plant details

Canna 'Le Roi Humbert' size, habit and characteristics

Plant type: Herbaceous perennial
Suggested uses: Borders, containers, tropical-themed gardens

Care notes

Pruning and caring for Canna 'Le Roi Humbert'

Cultivation: Plant rhizomes in spring after the last frost; keep soil moist and provide full sun for best growth.
Pruning: Remove spent flowers to encourage further blooming; cut back foliage after first frost.
Propagation: Division of rhizomes

Frequently asked questions

How do I grow Canna 'Le Roi Humbert'?

Plant rhizomes in spring after the last frost; keep soil moist and provide full sun for best growth.

Where is the best place to plant Canna 'Le Roi Humbert'?

Canna 'Le Roi Humbert' prefers full sun.

What soil does Canna 'Le Roi Humbert' need?

Canna 'Le Roi Humbert' grows best in rich and well-drained soil soil. Aim for soil that stays moist.

How do I prune Canna 'Le Roi Humbert'?

Remove spent flowers to encourage further blooming; cut back foliage after first frost.

Is Canna 'Le Roi Humbert' hardy in the UK?

Canna 'Le Roi Humbert' has an RHS hardiness rating of H5, meaning it is hardy in most of the UK, tolerating -15 to -10°C.

How do I propagate Canna 'Le Roi Humbert'?

Division of rhizomes.

More in the Canna genus

Browse all Canna →