mulching for celandine
Is mulching a flower bed helpful in keeping lesser celandine at bay? It's throughout my neighbor's lawn and now making its way into my beds. This has been suggested by their gardening/tree service.
They spread through their roots primarily, so mulching would be of limited help unless it was impenetrable and covered a large area: http://extension.umd.edu/hgic/lesser-celandine
Digging the bulblets is very difficult, because invariably some are missed.
Lesser celandine is very susceptible to glyphosate. It must be sprayed on the active leaves, but one application should do it. A very targeted application might be a good option for you. You can apply it with a nozzle held very close to the foliage, or with a brush or sponge. Do not let it contact your desirable plants. You can use a shield of cardboard or plastic to protect them.
Thanks for your response about the lesser celandine and mulching.
So what do you think is the gardening service's rationale for mulching to get rid of it?
If the mulch is thick enough, it would discourage the shoots from coming up and being able to absorb sunlight. Mulch should slow it down.
Mulch should not be placed right up against the base of plants (shrubs, tree or herbaceous plants) however, because of disease and pest issues, so the celandine could still find places to pop up.
Applying a thick layer of mulch may be more much less labor than painstakingly applying glyphosate among desirable plants.
So would 3 inches of mulch be enough or should it be thicker?
No more than 3 inches and keep away from the base of the flowers and shrubs.