Answer: It wasn't clear if this is a newly planted trumpet vine or one that has been in the ground for several years. There are many plants commonly called "trumpet vine" and they have different bloom periods, i.e., spring, summer or fall. I have a trumpet vine that blooms late summer into the fall. If the plant is new, you might want to find out when it typically blooms. If it has been around awhile, make sure that it has the proper sun exposure (most like full sun or will take some filtered sun). Your mom could also fertilize with a phosphorus source, such as bone meal, or something with a high middle number (0-45-0, for example). Phosphorus promotes flowering.
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