A relatively easy houseplant with striking red coloration. Aglaonema ‘Siam’ grows as a beautiful indoor plant with a medium growth rate. Growing in pots indoors, the colorful leafy foliage grows a maximum of 3 ft. (1 m) tall and 3 ft. (1 m) wide. Plant the Aglaonema in loose, well-draining soil and water the plant only when the soil partially dries.