Large hanging basket sizes begin at 14 inches in diameter. These larger container gardens require more plants to create a balanced and pleasing aesthetic design. Learning how to plant a 14-inch hanging basket involves proper preparation of the basket and placement of the plants to create a pleasing, decorative flair in the basket.
Place the empty hanging basket on a flat surface. Collect the three support chains above the planter and pull to the side.
Place a 1- to 2-inch layer of sphagnum moss along the inside of the wire basket up to the edge of the planter. If you chose to use coconut fiber liner, place the mat inside the wire basket and fit it to the basket shape. Some areas may gap and roll slightly. These bumps will ease when you add the soil and planters to the hanging basket.
Add potting soil to the lined basket to a level 3 inches below the basket rim. Always use new potting soil specifically designed for container gardening, containing peat moss, perlite and sand. The sterile material discourages diseases in the close environment of a hanging basket.
Choose three to five plants to fill out the basket. For a 14-inch pot, select plants in 4-inch transplant pots to use all available space in the container garden. Choose identical plants for a monochrome planter. Select plants of varying height and color to create a mixed floral hanging basket. Blend foliage cultivars with complementary flowering plants to create cohesion in the container garden.
Arrange the plants inside the hanging basket before removing each from the transplant pot to determine the best placement. Include a tall plant for height, filler plants to take up space, and trailing plants to spread outside the rim of the hanging basket.
Press on the outside of each transplant pot to release the plant. Don't tug or pull by the foliage to reduce damage to the plant. Grasp stubborn plants at the base of the stem and lift gently. Cut away the transplant pot with sharp pruning shears to remove tight root-bound plants.
Create a slight indentation for each plant inside the hanging basket. Planting depth to place the tops of roots about 1 inch below the planter rim. Fill in with loose potting soil, press firmly and add more soil if necessary.
Water the container thoroughly at the soil level to ensure adequate moisture distribution throughout the hanging basket.