unwanted vines on mandevilla plants
Thanks for writing. It sounds like dodder, a parastic plant. Unfortunately, once dodder infects a plant, there's no way to get rid of it. Your best bet is to remove the mandevillas and impatiens before the dodder produces seed. Use a pre-emergence herbicide when you replant to stop any dodder seeds from resprouting.
---Justin, Senior Garden Editor, BHG.com
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