It can be fun to think that the answer to all your garden problems is already in your kitchen and bathroom cupboards, but are household products or homemade brews really effective in the garden? C.L. Fornari looks at remedies passed over the backyard fences, through Facebook, and on Pinterest.  Learn what works, what’s a waste of time, and which “solutions” are actually garden disasters.  The lecture will take place at Elm Bank, 900 Washington Street, Wellesley, on Thursday, February 14 from 1:30 – 3, and is $15 for Mass Hort members, $22 for nonmembers.  Sign up on line at www.masshort.org.