What causes a cactus to turn yellow?

More and more people are growing cacti, and some plant lovers have found their cacti turning yellow without knowing why. In fact, the main reasons a cactus turns yellow are overwatering, too great a temperature difference, going too long without water, and waterlogged potting soil. Let's take a look together below!

Yellowing caused by overwatering

Your watering frequency is too often; watering once every half a month is plenty no matter what.

Yellowing caused by unsuitable temperature

For a cactus in winter, the temperature had best not drop below 10 degrees; staying below this temperature for a long time will make it turn yellow. On a windowsill, you can use wire and plastic film to create a sealed space with high temperature and high humidity. Under such conditions, most cacti not only grow fast but also have a crystal-clear color.

Yellowing caused by waterlogged potting soil

The potting soil for a cactus needs good drainage and aeration, and should be a lime-containing sandy soil or sandy loam. You can dig some soil from a flower bed in the city, then mix in sand at a ratio of garden soil to sand (3-4:1), and apply a decomposed dilute liquid fertilizer once every 10 days to half a month; in winter, do not fertilize.

Yellowing caused by going too long without watering

If you go too long without watering, the cactus will also turn yellow. There is no need for me to say more about the solution to this one!