During the corona out break we are running a sunflower comp. There are two pdfs that you might want to use locally.
The first is a poster to invite people in your street to join in:
poster http://www.sundaypapers.org.uk/wp-content/uploads/2020/03/poster.pdf

The second is a note to send spare seeds to friends note to go with seeds
http://www.sundaypapers.org.uk/wp-content/uploads/2020/03/note-to-go-with-seeds.pdf