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Dioscorea bulbifera

Dioscorea bulbifera · Dioscoreaceae

The gardener's calendar

The right move for September

In autumn, ease off feeding and take the chance to clean up around dioscorea bulbifera and prepare for winter.

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ID card

Common name
Air yam, aerial yam
Family
Dioscoreaceae
Plant type
Perennial climbing plant
Foliage
Deciduous, heart-shaped leaves
Flowering
Summer, small inconspicuous flowers in spikes
Hardiness
Tender, tropical to subtropical climate
Growth
Fast and vigorous
Origin
Tropical Africa and Asia

Care

Light and exposure

Install your Dioscorea bulbifera in a very bright location, ideally in full sun or partial shade. A south or west-facing exposure promotes robust growth and better production of aerial tubers. Avoid overly shaded areas that slow down vigor.

Regular watering

Keep the soil moist during the growing season (spring-summer), without creating waterlogging. Reduce watering in autumn-winter when the plant enters dormancy. Soil that dries out slightly between waterings is acceptable, but avoid complete desiccation.

Soil and drainage

Use rich, well-drained substrate enriched with organic matter (potting soil, compost). Neutral to slightly acidic pH is suitable. If grown in a pot, add sand or drainage beads to prevent root suffocation.

Pruning and training

Guide the climbing stems onto a support (stake, trellis, pergola) from the start. Pinch back the tips in spring to encourage branching. At the end of the season, you can cut back slightly after the leaves fall.

Fertilization

Apply balanced fertilizer every 15 days during active growth (April to September). Potassium-rich fertilizer promotes aerial tuber formation. Reduce applications in autumn-winter.

Pests and diseases

Watch for mealybugs and spider mites in dry or hot conditions. Excess moisture promotes root rot and fungal diseases. Good drainage and sufficient air circulation significantly reduce these risks.

Did you know?

Dioscorea bulbifera is remarkable for its aerial tubers (bulbils) that form directly on the stems as they grow. These small oval structures, edible in certain cultural contexts, inspired the common name 'air yam' and constitute a natural means of clonal reproduction. This fascinating phenomenon makes it a classic botanical study object regarding vegetative reproduction.

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.

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Tips generated and checked by Viridia — adapt them to your local climate.