Special Bonus: Beginners' Lesson on Seed Saving! Lori Caldwell, aka CompostGal, will go over a variety of techniques to help the transition to your Fall garden: seed saving, crop rotation, soil amending, cool-weather edible crops, sheet mulching and planting natives.teaches sustainable gardening classes throughout the Bay Area. Participants: To practice techniques of seed saving, please bring seed heads, pods, fruit, etc. to prepare and trade with others for a simple seed swap. Register here! Classes are free but a $5 donation to support our education programs is appreciated.