Honeywort Growing Guide

Cerinthe major purpurescens

Crop Rotation Group

Miscellaneous ●

Soil

Fertile, well-drained soil enriched with compost.

Position

Full sun to part shade.

Frost tolerant

Honeywort tolerates occasional frosts, but not frozen roots. It is hardy only to -5°C (23°F), so it is best grown as an annual.

Feeding

Drench with a liquid organic fertiliser when plants begin to grow tall in early summer.

Spacing

Single Plants: 30cm (11") each way (minimum)
Rows: 30cm (11") with 30cm (11") row gap (minimum)

Sow and Plant

Soak seeds in water overnight before planting sowing in containers indoors at the end of winter, or outdoors later on when the risk of frost has passed.. Expect seeds to germinate within 14 days. Start exposing the plants to outdoor conditions while the weather is still cool, and set them out when they are about 6 weeks old. Or, direct-sow seeds where you want the plants to grow in spring. Young plants need water when they are actively growing, along with careful weeding. Honeywort grows fast once the roots become well established.
Our Garden Planner can produce a personalised calendar of when to sow, plant and harvest for your area.

Notes

Cool weather intensifies the colour of honeywort’s purple bracts, so try to keep plants going until autumn. Honeywort is an unusual flower to grow as a cascading plant for walls or large containers, or you can use it to anchor a corner of the flower garden.

Harvesting

Gather stems for use in cut arrangements at any time, and sear the ends to help them last longer. Heavy-blooming honeywort produces a steady crop of seeds, which fall to the ground as they mature. Seedlings that appear in the fall survive winter in mild climates. Elsewhere, gather some of the large seeds for replanting in future seasons. Removing spent blossoms keep the plants in flower longer.

Planting and Harvesting Calendar

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Pests which Affect Honeywort

Aphids (General)

Slug

Snail