At Dart’s Christmas Tree Farm in Southold, the holiday season is in full swing. The field is full of green trees ready to be chopped. Inside the store, hand-made wreaths and garlands cheer up the barn. And just outside is the famous Magic Color Forest with trees of pink, purple, blue and white. The farm is open seven days a week 9 a.m. to 5 p.m. through Christmas at 2355 Main Bayview Rd.