These are mostly natives of tropical America.
Comprising both annuals and perennials, best treated
as half-hardy annuals, also called Moon Creeper.
Ipomaea rubra caerulea is the most favoured for outdoor
cultivation with lovely clear blue flowers, four
inches across at the mouth, and white in the tube.
It climbs up to six feet.
Ipomaea versicolor (syn. Mina lobata) will climb up
to six to eight feet, with flowers that are crimson
in bud, but change on opening to pale yellow.
Ipomaea quamoclit (syn. quamoclit pennata), six feet,
has scarlet flowers and should be grown out-of-doors
only in the warmest localities.
Ipomaea purpurea, six to eight feet, has flowers of
purple, blue or pink and sometimes produces double
For the outdoor flower garden Ipomaea rubra caerulea
is the most satisfactory and requires to be raised
from seed sown early in the year under glass.
The seeds are best sown at the rate of two in
a four-inch pot as they do not prick off satisfactorily.
Plant out against a sunny south wall or trellis
in early June.
Propagation is from seed.
The flowering season is from July to September.
See Also : Ipomaea