Ipomopsis

A very beautiful half-hardy biennial, but difficult tocultivate. Some gardeners steep the seed in hot water before sowing
it; but the best way seems to be to sow it in July in 3-in. pots in
equal parts of sandy peat and loam, ensuring good drainage, and place
it in a cold frame, giving it very little water. When the leaves
appear, thin out the plants to three or four in each pot. Replace them
in the frame for a week or so, then remove them to a light, airy part
of the greenhouse for the winter. During this period be careful not
to over-water them. In spring shift them into well-drained 4-1/2-in.
pots, using the same kind of soil as before, and taking great care not
to injure the roots; still give the least possible amount of water. If
plenty of light and air be given, they will flower in July or August.
Height, 2 ft.