Dracaena draco
The Canary Islands dragon tree is a very slow-growing tree that reaches about 15 m in time but takes around 10 years to reach 1.2 m. In the wild it survives on cliffs and inaccessible ravine slopes at about 30–800 m, in warm, dry scrub and thermophilous woodland moistened by trade-wind cloud. At home it needs full sun, a gritty, free-draining mix, and cooler, drier winters.
Where it grows wild
Cliffsides and inaccessible ravine slopes in two zones: the thermophilous woodland belt and the upper part of the tabaibal-cardonal succulent scrub, where the trade winds bring moist air. Truly wild plants are now limited to Tenerife; the last recognised wild tree on Gran Canaria died in 2009.
Literature gives about 30–800 m in the Canary Islands. Recorded elevations are 2–1521 m (median 366 m); the higher records are probably planted trees.
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The wild conditions above, turned into targets for a shelf, a tent or a greenhouse. The full profile has:
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Profiles are drafts built from measured range and climate and from published sources; each section carries its own confidence in the app. Photo from Wikimedia Commons, used under its CC BY-SA 3.0 licence, unmodified.