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How to Plant For container planting, select a container with adequate drainage holes and fill it with good quality, well-draining soil. Almost any commercially available potting mix will do the trick. For outdoor landscape planting, select a spot with well-drained soil where your Calla Lilies will receive filtered light or moderate shade. Dig holes and plant the tubers shallowly (no more than 4” deep) with the eyes facing upwards and the tops barely covered with soil or even slightly exposed. Water thoroughly after planting, gently soaking the soil to settle it around the tubers. How to Grow Water as needed during active growth, aiming for about 1" of moisture per week. Leave the foliage in place after blooming has finished for the season. The leaves will gather sunlight to create food through photosynthesis, strengthening the tubers for the future. Allow your Callas to rest for a few months after flowering has finished before beginning the next growing cycle. Apply a layer of mulch, straw, or leaves around the tubers in the fall to protect them from the elements in warmer climates. Dig up the tubers and store them in slightly moist peat moss if you’re in a region cooler than zone 10 and would like to save them for next season.