by Connie Oswald Stofko Hanging baskets and gift certificates. Those were the items suggested most frequently when I asked my Premium Partners what the most popular gift items were for Mother’s Day, which is coming up on Sunday, May 8. (And these gifts work just as well for gardening dads– Use these suggestions again when Father’s Day rolls around on June 19!) “The weather’s nice and people want something for outdoors,” said Dan Meyer, greenhouse associate at Mischler’s Florist and…