From Girl on Bike writes:

Have plants you need to prune? Extras that don't seem to fit in with your home or garden? Started too many seeds this year? Why not bring them all down to the North Oakland Plant Swap and trade them with your neighbors for some new-to-you plants and gardening supplies.

At the plant swap you can bring plants, cuttings, seedlings, starts, foraged plants and seeds of edible and non-edible plants.
 
This also is a great place to bring any extra gardening supplies you have: pots, natural fertilizers, vermicompost/worms, garden tools, stepping stones, etc. Pass them all on to a new home and come pick up some new-to-you plants for your garden and home.

The only entrance fee is something brought to add to the swap.

*Please remember to label each of your plants with these Plant Information Sheets

If You Go
What: North Oakland Plant Swap
When: Noon to 3 p.m. Saturday, May 7
Where: 5927 San Pablo Ave. in Oakland (on the Berkeley/Emeryville border)