Aspiring organic farmers can help put in spring greens at Holly Hill Farm — and take some home to plant in their own gardens — in a workshop titled “Greens, Seedlings, and Salad” on March 16 from 10 a.m. to noon. “We’ll get our hands dirty, make some compost, and sow some early spring greens, like spinach, kale, and pea shoots,” said Jon Belber, the farm’s education director. Cost is $12 for Friends of Holly Hill Farm members and $15 for non-members. The farm has also rescheduled its “Starry, Starry Night’’ event to next Saturday. The evening walk had been scheduled for Feb. 8, but was canceled because of the blizzard. For more information, call 781-383-6565. The farm is located at 236 Jerusalem Road.