Weeding A Stone Dust Path - Knowledgebase Question

Quincy, MA
Avatar for sdinsmor
Question by sdinsmor
March 26, 2001
I care for a historical garden that has stone dust paths which are covered with weeds in the summer in a week if I don't hand pull them. Would you recommend putting plastic underneath the stone dust to stop the weeds? I'd love to have an alternative to that, since sometimes the plastic shows. What's a good way to stop weeds from growing in a pathway like this? Thank you!

Answer from NGA
March 26, 2001
In most instances using plastic, tarpaper or even weed barrier fabric under the path gravel will not stop the weeds from encroaching either over the surface or by seed, and those that do root will run along between the barrier and the gravel quite happily.

In my experience, there are several approaches you can try. One is to rake the paths periodically (about twice a week) to disturb any germinating weeds. Another is to change the pH sufficiently to make it an inhospitable environment for most plants. This is not a good idea if it adjoins closely planted areas or there is concentrated runoff, however. Finally, you might have luck using corn gluten (or a commercial product) to act as a pre-emergent inhibitor.

Good luck!

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