Dracaena is very popular as a large potted plant for homes and offices. It should be planted in a loamy, well-draining soil amended with peat moss and watered regularly during the growing season. Best exposure will be a location with lots of indirect light; it will tolerate shadier locations but the leaves will lose some of their color. They are listed by NASA as an excellent plant for removing harmful chemicals from the air. Watering should be slightly restricted during the winter.
Dragon trees grow best in bright light but they can also survive in dim light. Plants in lower light situations will grow slower and will produce smaller leaves with less intense color. Don't place your dragon tree in full sun because the foliage might burn.
When growing as a potted plant, use loose, well-drained potting mix—loamy soil amended with peat moss is ideal. Make sure the container has room for the extensive root system. Some varieties are imported from Hawaii and will arrive with lava rock. If this is the case, remove about 1/3 of the soil and replace it with potting soil.
It's easy to over-water this plant. To ensure that you don't drown it, wait until the top half of the soil is dry before watering. In low light, this can take up to 3 weeks. If the plant develops brown tips on the leaves, that is often a sign of over-watering or the water contains too much salt or fluoride. Like other plants in its genus, Dracaena marginata is sensitive to fluoride, which can cause discoloration. To avoid fluoride, water dragon tree with distilled or non-fluoridated water. If the plant has yellow leaves, it usually means it needs more water.
Dragon trees prefer temperatures between 70 to 80 degrees Fahrenheit. Regular household humidity should be fine for them. If your house is particularly dry, consider a light misting from a spray bottle.
Dragon trees have a relatively low need for fertilizer. Feed them lightly at the beginning of spring or twice a year with controlled-release fertilizer. Do not fertilize in the winter.