I have grape hyacinths that are over-running flower beds and are getting into grass. What is the best way to get rid of them? How do they multiply (i. e. roots, seeds)?
Certified GKH Gardening Expert
Grape hyacinth multiply by either seed or bulblets. Your problem is with the seeds, though. Make sure to remove the flowers as soon as they have faded to keep them from spreading to areas that you do not want them in.
As for getting rid of them, unfortunately, you will just need to dig them up by hand. There is no selective herbicide for them.