Assemble Large Tree Blocks
1. Use a pencil to draw a diagonal line on wrong side of each white print 6-1⁄2" square. (To prevent fabric from stretching as you draw the lines, place 220-grit sandpaper under each square.)
2. Align a marked white print square with one end of an assorted light blue print 6-1⁄2×12-1⁄2" rectangle (Diagram 1; note direction of drawn line). Sew on marked line; trim seam allowances to 1⁄4". Press open attached triangle.
3. Align a matching marked white print square with opposite end of Step 2 rectangle (Diagram 1; again note direction of marked line). Stitch, trim, and press as before to make a large Flying Geese unit (Diagram 2). The unit should be 12-1⁄2×6-1⁄2" including seam allowances.
4. Repeat steps 2 and 3 to make six large Flying Geese units total.
5. Referring to Diagram 3, sew together two matching white print 2-1⁄2×5-1⁄2" rectangles and one navy blue stripe 21⁄2" square to make a large trunk unit. Press seams toward dark blue stripe square. The large trunk unit should be 12-1⁄2×2-1⁄2" including seam allowances. Repeat to make a second large trunk unit.
6. Referring to Diagram 4, sew together three large Flying Geese units and a large trunk unit with matching backgrounds to make a large tree block. Press seams toward top of block. The block should be 12-1⁄2×20-1⁄2" including seam allowances. Repeat with remaining Flying Geese units and large trunk unit to make a second large tree block.