Dracaena draco is a woody, evergreen tree monocot that can grow to about 10-15 m in height (but exceptionally up to 21 m tall and up to 15 m in circumference at the base of the trunk). Both trunk and branches produce large, compact clusters of silvery gray leaves.

Silvery-grey, smooth dichotomously branched. When young the stem is single. At about 10-15 years of age the stem stops growing and produces a flower spike. Soon a crown of terminal buds appears and the plant starts branching.

Generally has a large central trunk that with age may develop a number of side branches subtending a hugely wide semiglobose umbrella-shaped canopy. Not to be confused with Dracaena cinnabari, the Dragon Blood Tree native to Socotra.

Each branch grows for about 10–15 years and re-branches, so to determine its age one has to know roughly how often they flower, once every ten to 15 years (maybe more frequently in the Azores), and count the number of branches, so the age of the tree can only be estimated by the number of branching points before reaching the canopy.

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