Home Garden

Flower Box Deck Project

Building a flower box on or part of a backyard deck is a large project because you have to plan out every detail including selecting the right type of wood for the box. While some appreciate how easy it is to buy a plastic box at the local flower shop to place on a deck, others find more joy in building the flower box at home so the flower box matches the existing color and décor. Building flower boxes at home may also save you money, as sturdy wooden flower boxes for the deck may be costly to purchase.
  1. Integrated vs. Free Standing

    • A flower box deck project can be done in two ways. The flower box can be created as a free-standing object placed anywhere on the deck to display flowers, or it can be integrated into the deck itself as an extension of the deck. Free-standing flower boxes may be built in various sizes or shapes because they can be moved around the deck, while integrated flower boxes must be custom built to fit into chosen places on the deck.

    Choosing Wood

    • Choosing hardwood for a deck flower box may be ideal because hardwood is used in quality building for outdoor weather. Examples of hardwood are oak, mahogany and beech. Softwood tends to split easily when drilling, cutting and screwing nails into the wood, but it is a common type of wood. Plywood is a wooden sheet that is strong and flexible at the same time. Although it is ideal for creating boxes for outside conditions because it is waterproof, it is hard to paint and does not look as appealing. It is often used in areas where the wood is not visible.

    Creating the Box

    • A flower box for the deck must consist of four sides and a bottom. The front and back sides must be identical and the two ends must be identical to one another to create an even rectangle or square. The bottom of the flower box must measure the length of the box by the width of the ends, so the entire rectangular or square box is covered by the bottom piece. If the flower box is integrated and resting on deck level, the bottom of the box may be the deck surface itself. Nails and a hammer are required to build the box.

    Draining System

    • Flower boxes need a drainage system whether the box is integrated on the deck or is standing free. A drainage system ensures that excess water in the soil can leave the box, so the flowers do not drown during rainfall or from overwatering. Drill small 1/4-inch holes in the bottom of the box, approximately 1 inch apart. Place 1/4-inch-wide rocks or pebbles into the holes, so soil does not fall out. The excess water seeps out in the cracks between the rocks and drilled holes. Integrated flower boxes can use the deck itself to create the drainage system, while a free-standing flower box should have the drainage system created directly on the bottom panel.