Japanese honeysuckle
Lonicera japonica · Caprifoliaceae
📷 William Rafti of the William Rafti Institute, aka Rafti Institute at en.wikipedia. Original watermark removed by Ms. havisham at en.wikipedia. · Attribution
The gardener's calendar
Japanese honeysuckle is in full bloom: enjoy it, watch watering in hot weather and let spent flowers feed pollinators before pruning.
ID card
- Foliage
- Semi-evergreen to deciduous depending on climate
- Flowering
- May to September, white flowers turning yellow
- Adult size
- Up to 8 m tall when climbing
- Growth
- Fast and vigorous
- Hardiness
- Down to around -15 °C
- Origin
- Japan, China, Korea
- Soil type
- Rich, well-drained, slightly acidic to neutral
✓ Taxonomy verifiedSource: AI estimate · hardiness: reliability high.
Expert tips
The key tip
This climber spreads fast and becomes invasive if you don't guide it: tie it regularly to a sturdy support and prune twice a year (July and October) to keep it in check and encourage flowering on young shoots.
The common mistake
Letting it grow without guidance: it gets tangled, becomes woody at the base, and only flowers at the tips, often out of sight.
The pro's trick
Train new stems horizontally in spring.
Seasonal watch
Late summer: watch for red spider mites during prolonged dry spells.
Care
Watering
Water regularly during the first two years to establish a deep root system. Once established, Asian honeysuckle tolerates drought well. In hot summers, keep the soil moist but not waterlogged. Reduce watering in winter.
Exposure
Place it in partial shade to full sun: it appreciates at least 4 to 6 hours of direct light to flower generously. In very hot regions, partial afternoon shade reduces stress. Avoid dense shade, which reduces flowering.
Pruning and training
Prune after flowering (September-October) to control growth and encourage branching. Remove dead or diseased wood. Guide stems onto a support (trellis, pergola) from planting. Regular pruning limits spread and rejuvenates the plant.
Fertilizer
Apply balanced fertilizer in spring to support growth. An application of well-decomposed compost in late winter is usually sufficient to feed the plant. Limit excess nitrogen, which promotes foliage at the expense of flowers.
Soil preparation
Enrich planting soil with compost or quality potting mix. Ensure good drainage to prevent root suffocation. If soil is poor or very acidic, correct it before planting. A surface mulch retains moisture and gradually enriches the soil.
Diseases and pests
Asian honeysuckle is generally robust but may suffer from powdery mildew in warm, humid weather. Ensure good air circulation and avoid wetting foliage. Occasionally, aphids or red spider mites may appear: treat with soapy water or appropriate biological control.
Did you know?
Asian honeysuckle is so prolific that it has become invasive in some temperate regions, particularly in North America. Paradoxically, beekeepers appreciate it for its abundance of nectar over a long period, making it an excellent resource for pollinators throughout the summer.
Where to buy it
Best planted in autumn so the roots settle in before summer, or in early spring once the frost has passed. Pick a plant with healthy foliage and roots that are not exposed. Best time: March, October, November.
Add this plant to my garden →Plants from the same family
- HoneysuckleLonicera periclymenum
- Small scabiousScabiosa columbaria
- Red valerianCentranthus ruber
- Himalayan honeysuckleLeycesteria formosa
- Involucred honeysuckleLonicera involucrata
- Blue honeysuckleLonicera caerulea
Tips generated and checked by Viridia — adapt them to your local climate.