How often should you water a cactus (ball cactus) when caring for it?

The ball cactus is a common drought-tolerant plant with very strong vitality, and it is also one of the easiest potted plants to grow. You don't need to fuss over it the way you do with other green plants, and it will still grow well. A potted ball cactus is especially suitable for placing in an office or next to a computer, where it serves a certain ornamental purpose, but it cannot actually protect against radiation. So, how often should you water a ball cactus when caring for it? Besides that, what other details should you pay attention to?

1. How often should you water a ball cactus?

When growing a ball cactus, watering is a very delicate process. You can't give too much or too little, making it an extremely difficult process to get right. The ball cactus requires a dry environment and is afraid of waterlogged potting soil. Generally, you should keep the potting soil “dry when it should be dry and wet when it should be wet.” It is best to water with water that has been left to stand. As for how often to water a ball cactus, in the dry winter you can choose to control watering, and it is suitable to water between 10 a.m. and 11 a.m., pouring the water directly onto the potting soil, about once a month. As for how often to water a ball cactus, late spring and early summer are the peak growing season, so the number of waterings gradually increases. In midsummer, watering should be controlled as appropriate, and it is suitable to water once every two weeks. In autumn, another growth peak appears, and you can choose to water once a week.

2. Care details for the ball cactus

1. Soil conditions

Potted ball cactus plants generally require calcareous sandy soil or sandy loam with good drainage and aeration. Good aeration is essential; soil with high clay content is not suitable for the plant to grow roots. When planting, it is best to put some crushed brick and tiles at the bottom of the pot to increase drainage capacity and improve aeration.

There is also no need for overly fertile soil, which can easily cause root rot.

2. Temperature requirements

The suitable temperature for the growth of ball cactus plants is 20-30°C, with a maximum of no more than 35°C and a minimum of no less than 5°C. In winter, maintaining a temperature above 5°C is enough for them to overwinter safely, and the drier the potting soil, the more cold-tolerant they are. Winter temperatures should be relatively stable; if the temperature difference between day and night is too large, frost damage is likely to occur. When the spring temperature reaches above 15°C, they begin to grow; when the midsummer temperature reaches above 35°C, they begin to enter dormancy; and after the beginning of autumn, they resume growth.

3. Light conditions

Ball cactus plants are sun-loving plants and belong to the strong-positive type; only under strong sunlight can their flowers be vivid. Therefore, if you want more flowers, you should provide sufficient light, especially in winter when sufficient light is even more necessary.

Generally speaking, the taller and larger the plant variety, the more tolerant it is of strong light, while small varieties and seedlings are not so tolerant of light! Moreover, excessively strong light will also inhibit plant growth. If you are after size, you can provide appropriate shade and do not need full sun. In addition, it is better to provide appropriate shading in summer as well.

4. Key points for fertilizing

Ball cactus plants are tolerant of poor soil, but proper fertilizing during the growing season can make the plants grow faster! This is especially important for seedlings and grafted plants with well-developed rootstock root systems! Fertilizing should mainly use organic fertilizer, which can be mixed into the soil or mixed with clear water and then used to water the plants. Slow-release fertilizer can also be used; it is best to use phosphorus and potassium fertilizer as the main component and nitrogen fertilizer as a supplement. Just make holes in the pot and bury it in, and it can make ball cactus plants stronger!

In spring, you can apply additional fertilizer 4-5 times, in autumn 2-3 times, and do not fertilize in summer and winter.