Composting Workshops

Sign up for a free composting workshop!

Choose to take either a home compost lesson OR a worm compost lesson on 4 different dates this year. (See the schedule below.)

Sign up for the worm compost lesson and assemble a free working worm bin to take home.

Worm composting focuses on food scraps and is often the best option for those with limited space and minimal or no yard trimmings.


Sign up for the home compost lesson and have a choice of the following:

  1. $20 Earth Machine bin for backyard composting — retail value $130, 10 cu. ft. capacity
  2. $20 Soil Saver bin for backyard composting — retail value $95, 11.5 cu. ft. capacity
  3. $30 mail-in rebate towards (select one):
    • The purchase of a worm composting bin
    • The purchase of a lawnmower retrofit
    • The purchase of a mulching lawnmower

Limit one bin or rebate per household (while supplies last) for Napa County residents only. Cash or checks only.

2020 Composting Workshops — Registration Is Required!

Space is limited and workshops fill up quickly. Registration online is the surest way to reserve a space for your preferred workshop. Register for either one home compost OR one worm compost class on any workshop day. Workshops are approximately 2 hours. Some workshops are held outdoors, so please dress appropriately.

Saturday, March 14 at 9:00am
UC Coop Extension, Meeting Room, Napa

Saturday, March 28 at 10:00am
Boys & Girls Club, Calistoga

Saturday, May 16 at 10:00am
Senior Center, American Canyon

Saturday, September 9 at 6:00pm
Skyline Park Social Hall, Napa

Also, come visit us at the Oxbow Commons on Earth Day to find out about composting, soils, and upcoming classes! Earth Day is Sunday, April 26, 11am – 4pm.

Register online to immediately secure your space: No phone registrations are accepted.

Confirmation & directions are sent when your registration is complete. The online registration system allows you to cancel if plans change. This helps us to free up space for others.

If you want to register by mail, please send your name, address, primary phone number, choice of worm or home compost workshop, and desired first & second options for class dates to:

City of Napa, Utilities Department
Attn: Recycling / Materials Diversion Division
P.O. Box 660
Napa, CA 94559-0660