Light: Dracaena marginata plants prefer medium light, but survive in lower light situations. Lower light slows down the growth rate of a Dracaena marginata Plant and reduces the size of new leaves. Direct sun burns the leaves.
Water: Over- watering causes root-rot and is the main reason Dracaena marginata plants die. Water well and do not water again until the top 50% of the soil is dry, in low light this could be up to three weeks. Brown tips indicate over-watering or too much fluoride or salt in the water. Numerous yellow leaves at the bottom of the plants means a Dracaena marginata needs more water.
Fertilizer: A Dracaena marginata is a slow-growing plant that does not need much fertilizer. Feed a once a month in the spring and summer with a water-soluble, well-balanced plant food diluted to 1/2 the recommended strength.
You can read all my care tips for a Dracaena marginata in the popular Houseplant section of the website.