# Disc Cactus (Strombocactus disciformis)

> Endemic to vertical limestone cliffs in central Mexico, Strombocactus disciformis is a fascinating geophytic cactus recognized by its flattened, disc-like silhouette and overlapping rhombic tubercles arranged in spirals. Anchored by a substantial napiform taproot, this slow-growing rarity produces delicate creamy-white to pale yellow flowers from its woolly apical center.

- **Scientific Name:** *Strombocactus disciformis*
- **Botanical Family:** Cactaceae
- **Care Difficulty:** Expert (4/5)
- **Cold Hardiness:** -2°C (USDA Zone 9b) - Tolerates brief light frost only if maintained completely bone dry.
- **Pet Safety / Toxicity:** Pet-Safe (Non-toxic to cats and dogs)
- **Canonical URL:** https://sukulentler.com/en/species/strombocactus-disciformis
- **Markdown Source:** https://sukulentler.com/en/species/strombocactus-disciformis.md
- **Botanical Photo:** https://sukulentler.com/assets/images/articles/species_strombocactus_disciformis.webp?v=1794460823

## Light & Sun Exposure

Bright, filtered sunlight to gentle partial shade; shield from intense, scorching midday summer sun while maintaining high ambient light.

## Watering Schedule & Method

Extremely susceptible to root rot; apply a strict soak-and-dry regimen and withhold water entirely during the cold winter dormancy.

## Soil & Gritty Mix Formula

%85 Porous mineral substrate (crushed limestone, pumice, volcanic grit, zeolite) + %15 sifted cactus soil.

## Cold Tolerance & Overwintering

-2°C (USDA Zone 9b) - Tolerates brief light frost only if maintained completely bone dry.

## Propagation Methods

Sowing microscopic seeds in sterile conditions or grafting seedlings onto vigorous rootstocks to accelerate growth.

## Available Language Editions

- [TR: Disk Kaktüs (Strombocactus disciformis)](https://sukulentler.com/tr/turler/strombocactus-disciformis.md)
- [DE: Diskus-Kaktus (Strombocactus disciformis)](https://sukulentler.com/de/arten/strombocactus-disciformis.md)
- [ES: Biznaguita cónica (Strombocactus disciformis)](https://sukulentler.com/es/especies/strombocactus-disciformis.md)