Propagation
Sow fresh seed during early spring and pre-soak seeds in heated water 13º to 18ºC (55º-64ºF) for 24 hours. Seeds may require scarification.

Take soft tip cuttings of non-flowering shoots during spring and stem cuttings during summer.

Note:
Care should be taken when selecting a site as sweet potato dislikes soil that is high in aluminium and requires an application of lime. It also dislikes wet soils and a sudden burst of rain and during late summer may cause of the tubers to split open. 

The tubers should be cured at 27º C. ( 81º F) for 10 days and under ideal conditions sweet potatoes can be stored for 6 to 7 months, avoid chilling the fruit is this encourages rot.

Botanic information
Leaf: The variable dark green broad-ovate to palmately lobed leaves are up to 150 mm (6 in) long by 130 mm (5⅛ in) wide with a truncated or cordate base and a petiole up to 200 mm long. The lobed margins vary from broad-ovate to linear lanceolate with an acuminate apex and the leaves are arranged oppositely or spirally along the slender stems.

Flower: The white to lavender funnelform flowers have a purplish throat and are up to 50 mm (2 in) long with 5-stamens of unequil length and attached at the base of the petals. The pedicle is variable in length from 30 mm (1⅛ in) to 180 mm (7 in) and the flowers appear in the leaf axils solitary or in a small cyme from spring to summer or sporadically throughout the year in tropical regions.

Fruit: The small capsule is up to 8 mm (⅓ in) long and contains 1-4 hard coated black seeds that are around 3 mm (2/16 in) long but is not commonly seen. The small seeds are viable but the plant can be reproduced vegetatively to maintain true to type.