Answer:
Share compost,Organize a harvest swap, Start a seed swap,Set out a free produce stand,
If you're feeling ambitious you could start a community garden,you can give them your extra plant or flowers too,Encourage your local library to stock garden-themed books,Offer a class and
Plant your garden close to the road so that people who cross the road they will see how beautiful your plants are and there's a chance they will be influenced because they are amazed.
(Sorry if my answer is bad,arigatou gozaimasu)
