Wait until the ground has begun to freeze before mulching bulb beds. Mulching earlier will encourage bulb-munching rodents like mice and voles to nest there. A 3- to 4-inch layer of mulch will help prevent freeze-thaw cycles that can heave bulbs out of the ground; however, mulching is not absolutely necessary except in coldest areas.
You can use a rule to quickly find the center of a board’s width without dealing with small fractions. Lay the rule across the width, keeping the scale’s zero mark lined up with one side. Then angle the rule so that an even number lines up with the opposite side. Mark the board at half the distance. You can also find the center by drawing an “X” diagonally across from one set of opposite corners, then across from the other set of opposite corners. The exact center will be where the lines cross.