Mammillaria Hahniana
Mammillaria hahniana
succulentOften called the Old Lady Cactus, this charming mammillaria features fine white hair-like spines covering a small spherical body (2–3 inches diameter). It produces delicate pink or magenta flowers in a crown around the top. An excellent small specimen for containers and collections.
Common Problems
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Care Guide
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Light
Bright light with 4–6 hours of sun daily. Filtered sun in very hot climates prevents scorching.
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Water
Water moderately during growing season (spring/summer) when soil is dry. Reduce water sharply in winter; water sparingly or not at all.
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Soil
Fast-draining cactus potting mix with extra perlite or coarse sand.
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Fertiliser
Fertilize diluted monthly during the growing season only. Skip fertilizing in winter.
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Temperature
Tolerates 50–75°F; prefers cooler, dry winters (45–50°F) to encourage blooming.
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Humidity
Very low humidity (below 40%). High moisture promotes rot.
Toxicity
check_circleSafe for Catscheck_circleSafe for Dogscheck_circleSafe for Children
Non-toxic but fine spines are irritating if handled carelessly.
Common Diseases
Common Pests
Seasonal Care
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Resume regular watering and feeding as growth picks up.
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Peak growing season. Water and feed regularly.
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Reduce watering as growth slows. Stop heavy feeding.
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Minimal watering and feeding. Protect from frost if needed.