Yellow guinea yam
Dioscorea cayenensis · Dioscoreaceae
The gardener's calendar
In autumn, ease off feeding and take the chance to clean up around yellow guinea yam and prepare for winter.
ID card
- Common name
- Cayenne Yam
- Family
- Dioscoreaceae
- Foliage
- Deciduous
- Flowering
- Summer (inconspicuous flowers)
- Form
- Twining climbing plant
- Growth
- Fast to vigorous
- Hardiness
- Cold-sensitive (tropical and subtropical climates)
- Origin
- South America (Guyana, Amazon basin)
Care
Light
Place your Cayenne yam in a sunny to partially shaded location to promote growth. It appreciates bright, warm spots, especially in temperate climates where sunlight strengthens its vigor. Avoid overly shaded areas that would slow its development and tuber production.
Watering
Water regularly during the growing season (spring-summer) while keeping the soil moist but well-drained. Gradually reduce watering in autumn as foliage begins to yellow. In winter, minimize water since the plant enters dormancy and tubers rest.
Soil
Choose rich, deep, well-drained soil enriched with organic matter. Adding well-decomposed compost at planting promotes rooting and tuberization. Slightly acidic to neutral pH suits this tropical species perfectly.
Fertilization
Apply balanced or potassium-rich fertilizer at the start of growth to support tuber formation. A modest monthly feeding during the active season is sufficient. Avoid excess nitrogen, which would favor foliage over tuber development.
Pruning and staking
Install sturdy support or stakes at planting, as this twining climber naturally coils around them. Lightly prune overly vigorous stems to control spread. Remove dead or diseased foliage to keep your plant healthy and attractive.
Health and prevention
Watch for tuber rot if drainage is poor or winter moisture is excessive. Spider mites and thrips may occasionally affect foliage in hot, dry climates. Ensure good air circulation and avoid waterlogging to prevent fungal issues.
Did you know?
The Cayenne yam, like all Dioscorea species, played a crucial historical role: its starch-rich tubers sustained Amazonian populations for millennia before becoming an important crop in the Caribbean and Africa. Some genotypes contain interesting phytochemical compounds that have attracted the attention of modern pharmacobotanical research.
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
- Black bryonyDioscorea communis
- Wild yamDioscorea villosa
- Dioscorea bulbiferaDioscorea bulbifera
- GrapevineVitis vinifera
- CamelliaCamellia japonica
- Pedunculate oakQuercus robur
Tips generated and checked by Viridia — adapt them to your local climate.