Also known as Bread Cactus · Horst's Cactus · Horst's Gymnocalycium
Gymnocalycium horstii, a striking cactus species, features a flattened, globular body adorned with prominent ribs and characteristic areoles. It offers beautiful, star-sh
At-a-glance light, water, soil, and growing conditions from plant data
Bright, Indirect
75% intensity
Prefers bright light but avoid intense direct sun, which can scorch. Some morning sun is beneficial.
Infrequent
25% intensity
Allow soil to dry completely between waterings. Reduce in winter.
Well-draining cactus mix
50% intensity
Moderate to Warm
50% intensity
Ideal range is 20-28°C during the day, with cooler temperatures (10-15°C) in winter for dormancy.
Low
25% intensity
Feed sparingly during the growing season with a diluted cactus fertilizer.
Safety information from plant toxicity data
| Attribute | Value |
|---|---|
| Toxic for humans | No 0/5 intensity |
| Toxic for pets | No 0/5 intensity |
None
Key traits and growing stats from plant data
Watering, pruning, propagation, and repotting details from plant data
Water thoroughly when the soil is completely dry, typically every 2-4 weeks during the growing season.
Reduce watering significantly in winter, allowing the soil to dry out completely between waterings to prevent root rot. Ensure good drainage.
Pruning is generally not required for Gymnocalycium horstii as it is a slow-growing, globular cactus. If removing damaged or diseased parts is necessary, use a clean, sharp knife and allow the cut surface to callus before repotting or exposure to moisture.
Gymnocalycium horstii is typically propagated by offsets (pups) that form at the base of the parent plant. Gently twist or cut off an offset when it is large enough to handle, allow it to dry and callus for several days, then pot in well-draining cactus mix.
Repot every 2-3 years or when the cactus outgrows its pot, preferably in spring. Use a gritty, well-draining cactus soil mix. Handle the cactus carefully to avoid spine damage. Water sparingly after repotting.
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Monthly activity intensity for bloom and fruit across both hemispheres.
Flowering & fruiting calendar
Flowering & fruiting calendar
Photos of Cactus (Gymnocalycium horstii)
Where Cactus (Gymnocalycium horstii) is found
Density
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Common names and botanical synonyms
Botanical classification
| Rank | Name |
|---|---|
| Kingdom | Plantae |
| Division | Tracheophyta |
| Class | Magnoliopsida |
| Order | Caryophyllales |
| Family | Cactaceae |
| Genus | Gymnocalycium |
| Species | Gymnocalycium horstii |
Similar in genus Gymnocalycium
Answers based on plant encyclopedia data
