Tropicals

Oreocereus celsianus

Old man of the Andes cactus

Oreocereus celsianus. Available size and form may vary.

White woolly hairs surround upright, ribbed stems and contrasting spines, giving this cactus its old-man-of-the-Andes name. It slowly forms a clump and can eventually become tall. Mature plants may flower in summer, but a small indoor specimen is grown mainly for its textured stems.

At a glance

Water: Regular but modest spring–summer watering; dry during rest
Light: Very bright light with sun

Sizes & prices

6"$34.99

Catalog updated September 8, 2026. This is not a live stock count; please call to confirm availability and price.

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Keep in mind: Sharp spines are hidden among the white hairs; handle carefully.

Growing & care

Soil: Well-drained cactus mix.
Winter: Keep frost-free and dry during winter rest.
Feeding: Liquid fertilizer monthly during active growth, following the label.
Pruning: No routine pruning needed.
Pests: Inspect for scale.
Size & growth: A slow-developing upright cactus, eventually about 8–13 ft. tall and 1½–3 ft. wide in suitable conditions; young container plants remain much smaller.

Sources & photo credits

Royal Horticultural Society

Photo: Frank Vincentz · CC BY-SA 3.0

Reviewed September 26, 2026. Growing conditions vary by location.