These Aloe pearsonii leaves have well-spaced marginal spines, up to 5 mm apart. The deltoid spines are from 1 mm to 2 mm long, here whitish but sometimes dull red.

The spines are comparatively crowded near the leaf-base where they are taller, widely spaced and shorter near the tip where they may be almost absent. Right at the tip there may be a pair of spines, a single one or none at all (Reynolds, 1974).