Mammillaria Elongata Cristata aka Brain Cactus

Mammillaria Elongata Cristata is also known as a Brain Cactus due to its convoluted and sinuous growth that resembles a brain. It happened through mutation or damage to the apical meristem (centre of growth). This species grows quite slowly and needs mineral soil with little organic matter (peat, humus). 

LIGHT
Full to partial sun

COLD TOLERANCE
-5 ºC
WATER
Water generously when soil is dry.
SOIL PH
Unknown
SOIL TYPE
30% potting mix 70% non organic material (pumice or perlite).
FERTILIZER
Fish emulsion, kelp solution, worm casting, shrimp compost.
PROPAGATION METHODS
Stem cuttings
HUMIDITY LEVEL
Low
ACTIVE SEASON
Sept - April

NOTE

INSTRUCTIONS FOR ROOTING CUTTINGS 
Insert cutting into the soil (1" deep). When soil is dry, water the plant sparingly. Roots should form in the following 2 - 6 weeks (Cuttings will take root in a minimum temperature of 20° C). Plants should be in bright shade during the rooting period. To avoid the plant from getting burnt, acclimatize them to full sun.