credit: seattletilth.orgThis weekend Seattle Tilth is holding its earliest Early Spring Edible Plant Sale ever. You’ll find starters and seedlings, with a focus on rare and heirloom varieties that do well in cool weather, as well as fruit trees, herbs, and edible flowers. Experts will be on hand to give advice on what to get in the ground when, and there will be a selection of gardening accoutrements to make this dirty-handed chore more appealing. Pre-sale: 5:30-7 p.m. Fri., March 19. $25. Sale: 9 a.m.-2 p.m. Sat., March 20. Free entrance. Magnuson Park, Hangar 306310 N.E. 74th St. (off Sandpoint Way N.E.), 633-0451.