Mandevilla ' Sun Stripes'?

Looks like a mandevilla, sometimes called dipladenia. The blooms are usually pink, red, or white. Yours is striped, so I think it's a fairly new variety called 'Stars and Stripes'. I don't think they're ever yellow....the man you talked to may have been thinking of an Allamanda, which is a different genus, but a vine in the same family. It also has five lobes to its flowers.

People in my area (SW Indiana, zone 6) grow mandevilla as a summer annual, but lose them with the first hard frost. I don't know of them coming back after even an average winter. I'd keep it on a sunporch and not try to overwinter it outdoors since they are subtropical.

Pentalinon luteum (Urichites lutea ) is frequently referred to as Yellow Mandevilla.

Here is a link that might be useful: Yellow Mandevilla

This post was edited by saltcedar on Sat, Oct 19, 13 at 8:59

Mandevilla funiformis as it turns out is Yellow and is a true Mandevilla, who knew?

Sorry, but there is not a hope for you to successfully winter over this plant outdoors. Treat it as a summer annual or bring indoors and store over winter before returning out late next spring.

Here is a link that might be useful: overwintering a mandevilla

My mom successfully overwintered ours once next to a basement window, but it took till September to come back. Last year I pruned it back and put it on my light shelf. Aside from the aphid problems, it did great.