Tips for plants in pots Deeper pots need less watering than small pots, which quickly dry out. Roots will also have more room to spread in a deeper pot. Pots at least 12 inches wide and 10 inches deep work best. For hanging wire baskets, use larger sizes of containers. A thick layer of sphagnum moss won't dry out as quickly, plus heavier baskets are better suited to withstand windy days.
Window boxes can be extremely heavy with moist soil and plants.
Make sure boxes have proper support. The load-bearing capabilities of your balcony also must be considered before planting heavy containers. Scrub old pots with a 10 percent bleach solution before re-using. This will kill disease and pests and will help remove any accumulated fertilizer salts. Shield container plants from midsummer heat by using a lattice, awning, umbrella or shade fabric.