If the cactus is pollinated, it will harvest a lot of seeds after the flowers are withered. When the seeds are ripe and collected, they can be sown; for the flowers without pollination, the number of seeds is very small.
Cactus can be planted with river sand. After washing river sand for many times, water it with potassium permanganate or carbendazim for sterilization.
It is better to keep the temperature above 20 ℃ in sunny days.
Spread the seeds evenly in the container filled with river sand. Do not cover it with soil. Cover it with a plastic bag. Leave a small hole on it and put it in the place of astigmatism and ventilation. It will sprout in a week.
The small ball sown by seeds must be kept stuffy. Open the bag every day, and then it will be stuffy. Spray carbendazim once a week to disinfect the soil. The sun is not poisonous in winter and spring, and it can be more exposed to the sun, and it will be put in the light scattering place in other seasons.
One year later, you can harvest dozens of balls. When the weather is warm, you can remove the bags and maintain them normally. Usually, you can keep them in the sun more than 3 years later.
Seed cactus is much more powerful than cuttage. When seeds are sown in the soil, they will become bigger in minutes. It's a sense of achievement!
Don't rush to repair the root of the cactus you just bought. Leave it in the natural ventilation place for 1-2 days. The hairy root, old root and rotten root that have lost their growth power will be pulled off with your hand.
Wait for the wound to dry, and then transplant it into the basin with damp soil. Do not water it immediately after planting.
The cactus is resistant to barren soil and has low requirements for soil fertility, but the shallow root system is especially afraid of water logging, so the soil should be soft and permeable. Ordinary garden soil and sandy loam can be added with some particles.
Don't know how to judge the frequency of watering, put a bamboo stick or chopsticks in the soil, and often pull out the bamboo stick to check. If more than half of the inserted parts are dry, it means that it's time to water.
Cactus need enough light, but they are afraid of strong light. Most of them can withstand high temperature in summer, but they can't withstand strong sunlight. Therefore, they should also be shaded in summer, and full sunshine in other seasons.
Different balls have different light resistance, many and dense burrs, and can hardly see the green ball. For example, white birds, white stars and other kinds of balls are very sun resistant.
The spines are short and thin, and most of the green spheres are exposed, so they are not very sun resistant, such as the sea king of naked calyx.
In addition, the drier the pot soil is in summer, the more likely it is to be sunburned, and the wetter the pot soil will be. If the ball is sunburned unfortunately, water it quickly, and put it in the shade, so that the ball can recover slowly.
Large temperature difference is good for the growth of the ball and the volume of the ball, but the temperature difference has a range, not the bigger the better.
The most suitable temperature difference for most plants is generally 15-28 degrees, which is not good for the ball. For the ball, the most suitable temperature difference is more than 10 degrees.
The cactus needs a lot of water and fertilizer during its growing period. When it is put into the pot, it can add granular slow-release fertilizer to the soil; when it is added with phosphorus fertilizer in autumn, it can make the ball bloom more in the spring of next year;
Applying some potassium fertilizer in spring and autumn will make the ball stronger in summer or winter.
The basin change should be carried out before the early spring and vigorous growth period. At this time, the new capillary root has not yet grown. At this time, the basin change will cause the least damage to the root system of the ball. After the basin change, the ball will grow vigorously and the root system will adapt to the new environment more easily.
If the early spring is missed, it is also possible to change the basin in late autumn. The late autumn is close to the dormancy period of the ball, and the damage to the root system is relatively small. However, the ball does not grow after changing the basin, and it cannot adapt to the new environment quickly, so the basin change in late autumn is not as good as that in early spring.
