The Q&A Archives: mandevilla

Question: I live in R.I. and the plant appears to be growing nicely but without any signs of buds. It is in a container and was kept indoors over our cold winter and I now have it on my deck outdoors. The tag that tells us about the plant says it flowers from spring to fall. Why hasn't it begun to bloom and what can I do to help it? Sean

Answer: The biggest concern with these overwintered tropicals is getting them to put on new growth early enough to begin flowering before summer is over. They bloom on the new growth. Often the plants get rootbound in their containers, and put on little to no new growth and we see less flowering in subsequent years. They can be nice green plants, but that is not why you bought them. To encourage new growth, consider repotting to a larger container, or at least removing old soil and cutting off some roots, then shearing back the plant by one third to one half in February or March. This should speed up the process and hopefully give you a blooming plant much earlier. Full sunlight, regular fertilization and water are also very helpful.

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