Diagnosing a Drooping Candelabra Cactus (Euphorbia)

A mature candelabra cactus (likely Euphorbia trigona or similar) has begun drooping over the past week and a half—first the top, then lower branches. No changes in watering, location, or soil in five years. The plant is in Ontario, where it's been unseasonably warm, but the home is air-conditioned.

Drooping can signal two very different issues: the plant may simply be top-heavy from vigorous growth, or it could be dying from root rot or internal decay. Without a photo, it's impossible to distinguish. Critical details needed: watering frequency, soil condition (likely depleted after five years), and any black spots, soft areas, or breaks in the tissue.

If the base feels soft or the soil smells sour, rot is probable. Unpot immediately, inspect roots, and cut away all affected tissue. If the plant is just top-heavy, prune back the tallest arms, repot in fresh well-draining mix, and stake until re-established. Always wear gloves when handling Euphorbias—their sap is irritating.