Top-Down Cactus Rot: Frost vs. Root Death, Euphorbia Exception

Two Causes for Tip-Down Death

If Euphorbia (paired spines, latex): cut black tips IMMEDIATELY. Latex spreads rot down.

If frost: wait for spring; trim dead only. If root death: likely total loss unless base sprouts.

Cactus: Ornamental Cactus Crown Rot: Surgical Removal and Cultural Correction; Stabilizing a Leaning Heirloom Columnar Cactus; Transplanting a 30-Year Blooming Zygocactus (Christmas Cactus); Rotting Barrel Cactus: Low Survival Odds; Neoraimondia herzogiana: Natural Woody Trunk Formation Is Healthy; Tall Cactus Basal Rot: Thin Species = Cut and Root, Fat Species = Lost; Euphorbia Cold Damage: Fast Rot Spread, Basal Damage = Likely Loss; Christmas Cactus (Zygocactus) Outdoors and Repotting Advice; Epiphyllum (Orchid Cactus) Identification and Blooming Tips; Cactus Plants: Low-Maintenance Succulents for Dry Indoor Air

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