Dioscorea batatas. syn. Dioscorea polystachya ; Dioscorea opposita
Hardy Yam
The Hardy Yam is a vine with heart-shaped leaves, and that produces edible aerial tubers.
Contributed by @petecross
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Full sun to partial shade
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Occasional watering
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Full Frost Hardy: 5F (-15°C)
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Moist and free draining
Common name
Hardy Yam
Latin name
Dioscorea batatas. syn. Dioscorea polystachya ; Dioscorea opposita
type
Tuberous Vine
family
Dioscoreaceae
ph
5.5 - 8.0 Acid - Neutral
Plant & bloom calendar
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Best time to plant
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When the plant will bloom
full grown dimensions
Dioscorea batatas. syn. Dioscorea polystachya ; Dioscorea opposita
The Hardy Yam is a vine with heart-shaped leaves, and that produces edible aerial tubers.
Flowering
From Late Autumn TO Mid Autumn
Flowers appear from late Summer to mid Autumn, and each plant has either male or female flowers - so if seed is required, two plants are needed, one male and one female.
Propagating by seed
From Early Spring TO Mid Spring
Sow seed in early Spring in a warm greenhouse, and only just cover the seed. It takes 1-3 weeks to germinate at 20°c. Prick out the seedlings when they are large enough to handle and grow on in the greenhouse for their first year.
Planting
From Mid Spring TO Late Spring
Plant out in late Spring as new growth appears. Plant in to well-draining, moist soil, in a sunny, or partially sunny, site.
Propagating tubercles
From Late Summer TO Early Autumn
Tubercles (baby tubers) are formed in the leaf axils. These can be harvested when they are about the size of a pea, in late Summer to early Autumn when about the size of a pea. Pot them up in individual pots in an unheated greenhouse or cold frame, covering them with about 10mm of soil. Keep the soil moist, but not wet. When they come into active growth in late Spring to early Summer, plant them out.