Ceratostigma Plumbaginoides (Plumbago larpentae)
Set plants 15 to 18 inches apart. Ceratostigma will grow virtually anywhere, in good soil or poor, in sun (preferable farther north) or shade, heat or cold.
We recommend a light winter mulch. As plants spread rapidly, frequent dividing may be necessary; this is best done in spring.
Zones 5 to 9.