Although caladium plants are not a common plant to grow vertically on a trellis, with the prolific and full growth potential of caladium plants, a large caladium can benefit from trellis support. Select a suitable growing location where you can make the trellis secure behind the caladium plant and then tie caladium plants to a trellis to support them as they grow.
Situate the caladium plant in a shady growing location in a spot where you can install a trellis approximately 3 to 4 inches behind the plant.
Pound the trellis into the soil behind the caladium plant, pounding it 4 to 6 inches into the soil with the hammer.
Cut a 6-inch length of soft plant tie and find the largest stem holding the largest and heaviest leaves. Pull this stem up to the trellis and tie it gently to the trellis with the plant tie. Use the entire length of the plant tie to ensure you do not tie the stem too tightly to the trellis, tying the plant tie in a simple double knot.
Repeat the tying process to give support to the largest and heaviest stems. Once you secure these stems to the trellis, the smaller stems will naturally grow more upright as they grow along with the larger stems.
Tie additional stems to the trellis as they grow and become heavy, if you see that they require support.