Smart tips for caring for ball cacti: every pot survives and blooms abundantly and beautifully

Although many people say ball cacti are easy to grow, plenty of people manage to kill them, let alone get them to bloom. So today I'm going to share a few "killer tips" with you to keep every pot of ball cacti alive and blooming abundantly and beautifully.
When we first fall into the cactus rabbit hole, we usually just go by eye appeal, without considering the variety, the environment or the growing method, and then one day we find the plant has kicked the bucket. So to solve this high mortality problem, when buying we still need to first decide what we like - whether it's flowers, spines or hybrids - since you can find a corresponding variety for each, and that way you can improve your growing experience more effectively.
As for outdoor growing, many people say outdoor growing is best, and that without sun the plants easily get leggy. Actually, this still depends on the region - some regions get a lot of rain and aren't suitable for outdoor growing. Outdoor growing also depends on the variety: for example, heavy-spined types, grass ball types and shrimp cacti are fairly sun-tolerant, but the first prerequisite for any plant's sun tolerance is a good root system and a healthy body; otherwise, even the most sun-tolerant variety still won't make it.
To grow good roots, first mix a good soil. For example, for heavy-spined types you can use 1-3mm granular soil mixed with peat soil, at a ratio of about 7:3. In addition, when growing ball cacti, unless it's a large columnar type like the prickly pear, in an artificial environment it's actually recommended to apply more phosphorus-based fertilizer. You can use an organic nutrient solution made specially for succulents; it lets the plant's root system grow stronger and improves disease resistance, and also makes the ball grow plump and round and bloom more.
As for watering, it's generally water thoroughly once the soil has dried out completely, but the question of cutting off water in winter is still debated. Some people advocate watering occasionally in winter, but among ball cacti not many can withstand low temperatures. Cactus growers in the north have heating in winter and don't restrict water either, so their plants basically never bloom. So whether winter dormancy goes well or not does affect blooming, and if you want to see flowers, cutting off water is still recommended.
As for sowing, you've probably heard that dense sowing gives a higher survival rate and faster growth. This is because the plant's roots secrete a hormone that, during the seedling stage, can indirectly help growth, but at the large-plant stage it becomes inhibitory, and crowded plants get squeezed to death. So if you want to keep more varieties, you can generally move them to their own pots once the plant is about 0.5cm.
Actually, keeping ball cacti alive isn't that hard - you can try these methods. Of course, some varieties take several years to bloom, so you need to be patient too.