Red Giant (Orontium Aquaticum) Red flower stems highlight the yellow spadix (flower) on this lovely, unusual pond plant. Red Giant is similar to the Golden Club, but with red stems instead of white. The leaves are thick and long. A lovely and interesting plant selection. Plant in pots in shallow water 12 - 18 inches deep using rich, loamy soil. Prefers full sun but will tolerate some shade. Grows 1 - 2 feet tall with clumping habitat. Blooms in spring.