Mammillaria Celsiana iis a globose cactus, solitary when young, but each single stem begins to divide dichotomously to form two stems as it matures, this process repeats several times giving rise to small clustered groups and occasionally to large mounds with dozen of heads. Individual stems are globose, becoming cylindrical with age, up to 8 inches (20 cm) tall and up to 6 inches (15 cm) in diameter, apex somewhat sunken and woolly, dark green, blue-green or grey-green. Spines are glassy white or yellow. Flowers are small in a ring near the top of the cactus, up to 0.6 inch (1.5 cm) long, bright carmine to rose-red with reddish-brown outer petals..
Mammillaria species like most cacti they're drought tolerant and need very little care and attention to grow well . Plenty of sunshine will keep this cacti more than happy. Provide bright, even light to encourage tight growth and flowering. Some shade during a hot summers day can be helpful to prevent sunburn.
Allow the soil mix to become nearly dry between watering, but then water thoroughly. Suspend watering in the winter, but mist occasionally. Not enough sunlight and over-watering are common mistakes.
Use pot with good drainage and a very porous potting media.
Feed every 4 weeks with a high potassium fertiliser during summer
Suited for window sill and dish gardens
For watering cacti, the golden rule is to make sure the soil is completely dry before watering! This will stop the roots from rotting. It is advised to always use a pot with a drainage hole so that excess water can get drained out. If kept in a sunny area, you will need to water it once every week. If it is in a semi shaded or filtered light area, you might need to water it once in 2 weeks.
Cacti like soil that is well aerated and fast draining. You can fertilise the cactus in the summer months when it is in its growing season. During the winters it is best to cut back on any fertiliser and let the plant rest.
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