Gerrardanthus macrorhizus 'Big Foot'

This dramatic caudiciform combines a swollen, sculpted base with a twining vine—equal parts botanical curiosity and living sculpture.

‘Big Foot’ is a cultivated form prized for its exaggerated caudex, which can resemble a gnarled, ancient root system erupting from the soil. Over time, the caudex develops deep fissures and characterful contours, while slender vines climb, sprawl, or cascade depending on how it’s trained. It’s a plant that looks older than it is—always a favorite among caudex collectors and succulent enthusiasts.

Native to arid regions of southern Africa, Gerrardanthus macrorhizus stores water in its caudex to survive long dry periods, then bursts into growth when conditions are favorable. In cultivation, this rhythm translates into a fascinating seasonal push-and-rest cycle.

How to Grow Indoors

• Light: Bright gentle light, with direct sun tolerated once acclimated

• Water: Water deeply, then allow the soil to dry completely. Allow to stay for a few days before rewatering. Overwatering is the fastest way to lose this plant

• Soil: Extremely fast-draining mix (cactus mix amended with pumice or perlite)

• Growth habit: Climbing vine — provide a trellis, let it trail, or allow it to ramble naturally

• Dormancy: Growth may slow or stop seasonally; reduce watering during rest periods

How to Grow Outdoors (Bay Area)

Best grown outdoors only in warm, dry microclimates with excellent drainage and protection from prolonged cold or winter rain. In San Francisco, this plant is generally happiest grown as a container specimen that can be moved under cover during wet months.

Bloom Information

Produces small, inconspicuous flowers when mature. This plant is grown primarily for its caudex and architectural form rather than its blooms.