Planter baskets are an attractive alternative to plastic or clay pots for displaying your flowers. Most planter baskets are made of metal, though plastic versions are also available. Baskets must be lined properly to hold the soil and plants before planting, but many come with their own fitted moss or coconut coir liners. If yours don't, the proper liners are readily available at garden centers in a range of sizes. If you can't find a suitable planter basket, use any attractive plastic basket you have on hand.
Fill a large bucket with warm water. Soak the liner in the water for two to three hours. Liners resemble mats of light or dark brown fibers that are either flat or pre-formed.
Squeeze the excess water out of the liner after you are done soaking it. Push it into the basket, forming it to the bottom and sides. Position the liner so its rim is even with the rim of the basket or protrudes slightly above the basket rim.
Fill the basket with a quality potting soil, leaving a 1-inch space between the top of the soil and the rim of the basket. Water the soil until it is evenly moist but not soggy.
Plant your flowers in the soil, spacing them at about half the recommended spacing distance on the plant label. Plant them at the same depth they are at in their nursery pots. Plant trailing or vine-like flowers around the edge of the basket with taller, upright flowers in the center.
Set the basket in an area that receives the recommended light requirements for the flowers you are growing. Alternatively, hang the basket if it comes with the proper hardware for hanging.
Water when the soil surface begins to feel dry. Outdoor baskets may require daily watering, while indoor baskets can go three or more days without irrigation.
Fertilize the plants weekly with a soluble, balanced fertilizer. Apply the fertilizer at a quarter of the rate recommended on the fertilizer package. Alternatively, fertilize every two weeks at half the recommended rate.