Corey Miles Fairfax June 15, 2017

I am working on a CBSM campaign that was developed to promote the use of native plants rather than invasive or non-native plants in their landscape. The goal is to reach 100,000 homeowners with the campaign. I'm wondering if anyone knows what percentage of the population need to be doing a particular behavior (in this case it is using native plants) before it's the social norm?
Thanks!

Corey Miles
Coastal Program Manager
NVRC
United States