Euphorbia heterochroma is an ornamental, densely-branched plant with square stems.
Light: The best place for most cactus houseplants is a warm, bright spot. These sun-lovers do best when they get lots of direct light, at least 6-8 hours per day.
Water: From spring to fall, water every couple of weeks only if it is dry. Reduce watering during the winter months and only water when the plant shows signs of wilt.
