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Photo: Shutterstock/Siriwat Chamnanyoch
Trumpet Vine
Although showstopping and brimming with colorful blooms, trumpet vine's cons often outweigh its pros. This woody plant is very aggressive and is considered invasive in some regions. As its beautiful flowers fade, they produce large seed pods which, as they dry and split, drop hundreds of seeds. The vine will grow and latch on to anything in sight, so it requires substantial support and regular maintenance.