Mammillaria gracilis (syn. Mammillaria vetula ssp. gracilis)

This cactus is Mammillaria gracilis
(syn. Mammillaria vetula ssp. gracilis)

🌵 Common names: Thimble Cactus, Powder Puff Cactus

🌱 Identification (Why this is Mammillaria gracilis)

• Strongly clumping habit with many small heads

• Tiny globular to short cylindrical stems

• Dense white, star-shaped radial spines forming a netted pattern

• Almost no visible body because of tight white spination

• Offsets form very easily → creates a mound like in your photo

This exact look is classic Mammillaria gracilis, very popular in nurseries.

🌸 Flowers & Fruits

• Flowers:

  • Small, creamy white to pale yellow

  • Appear in a ring around the crown

• Blooming season: Late winter to spring

• Fruits: Small pinkish-red berries after flowering

☀️ Care Guide (Perfect for Indian Climate)

Light

• Bright light to full sun

• Best: morning sun + bright indirect light

• Too much harsh summer sun can slightly yellow spines (not harmful)

Water

• Water only when soil is fully dry

• Summer: every 6–8 days

• Winter: once every 3–4 weeks

⚠️ Overwatering is the biggest killer

Soil

Very fast-draining mix:

• 50% coarse sand / perlite

• 30% garden soil

• 20% compost or cocopeat

Temperature

• Ideal: 18–35°C

• Heat tolerant

• Protect from heavy rain & frost

Fertilizer

• Once a month during growing season

• Use diluted cactus fertilizer (low nitrogen)

🌱 Propagation (Extremely Easy)

• Simply twist off offsets

• Let dry 2–3 days

• Plant in dry soil

• Roots form quickly 👍

⚠️ Common Problems

• Soft or black base: Overwatering

• Stretching: Low light

• Mealybugs: Can hide between clumps (check occasionally)

✅ Health Check 

✔ Compact growth
✔ Dense white spines
✔ Heavy offsetting
✔ No visible rot

This is a very healthy, mature clump and an excellent flowering candidate 🌸