Hydroponics Mammillaria hahniana indoor cactus plants

1.Why there's color variation of cactus?

It is due to genetic defects, viral infection or drug destruction, leading to part of the body can not normally produce or repair chlorophyll, so that chlorophyll loss part of the anthocyanidin increase and appear, part or whole color truns white /yellow /red phenomenon

2.How to do if the top of cactus is whiting and excessive growth? 

If the top of cactus turns white, we need to move it to the place where with enough sunlight. But we cannot put it completely under the sun,or the cactus will be burnt and cause rot. We can move cactus into the sun after 15 days to allow it to fully receive light.Gradually restore the whitened area to its original appearance.

3.What requirements about planting cactus?

It is best to plant cactus in early spring , so as to catch up with the golden growth period with the most suitable temperature, which is conducive to the development of cactus roots. There are also certain requirements for the flowerpot for planting cactus, which should not be too large. Because there is too much space, the plant itself cannot fully absorb after sufficient watering, and the dry cactus is easy to cause root rot after a long time in wet soil. The size of the flowerpot is as long as it can accommodate the sphere with few gaps.