Adenium Plant Care for Winter

Warm Climates

• Adenium plants cannot tolerate temperatures below 40 degrees Fahrenheit and grow as outdoor plants only in areas that do not experience winter freezing. The plants may enter a period of semi-dormancy in midwinter during cool, dry weather, resulting in a temporary loss of leaves. Adenium begins producing new leaves and begins to flower in late winter and spring when grown as an outdoor plant. Fertilize adenium during the winter months only when temperatures remain above 80 degrees Fahrenheit. Use a balanced, soluble fertilizer applied at the full package-recommended strength every two weeks.

Cold Climates

• Container growing provides a way to enjoy adeniums in colder climates where temperatures regularly drop below 40 degrees Fahrenheit in winter. Bring the plants indoors in fall before nighttime temperatures drop below 45 degrees Fahrenheit and place it outdoors only after all frost danger has passed in spring. The plant benefits from summer spent outdoors where it can receive the light and warmth it requires for healthy grow. Plant adenium in a terracotta pot that is at least 10 inches in diameter. Use a well-drained soil mixture, such as one formulated for desert plants.

Indoor Care

• Plants wintered indoors don't undergo the outdoor climate change that results in semi-dormancy. Force the adenium into dormancy by gradually reducing and then stopping watering until all leaves drop from the branches. Once dormant, the adenium can better tolerate the lower light conditions inside the home during the short winter days. Water semi-dormant plants when the soil dries out completely. As spring approaches and the days begin to lengthen, move the plant to an area where it receives bright, all-day sunlight to encourage it to put on new growth. Begin fertilizing once the adenium begins growing in new leaves.

Cold Damage

• Outdoor grown plants can tolerate minor cold damage caused by temperatures below 40 degrees Fahrenheit. The plant likely won't survive freeze damage if temperatures drop below 32 degrees. Minor cold damage first affects the branch tips, causing them to die back. Prune off damaged tips once the danger of cold temperatures is past. Covering plants with a frost blanket when cold temperatures are expected may trap heat around the plant and help prevent cold damage or plant death.