In general, it is suitable for many kinds of soil, but it is better not to use garden soil, because it is not very effective in ventilation, drainage, and resistance to pathogens and weeds. But don't use peat all the time. Although it's lighter, it's not easy to get wet and compact.
If you make it by yourself, you can use peat and vermiculite to keep it at 6-6.5 pH. If you want to be casual, you just need to make sure that the soil is loose and breathable. However, it should be noted that if the soil is very sticky, or strong alkaline, or easy to be waterlogged, it will not grow well, it is easy to let its rotten roots die.
It likes to be fat, and the soil should have enough fertility. It can be made from local materials, mixed with rotten leaves and soil, not fresh leaves. Still can add cinder, it is lighter, after it is milled, mix evenly in soil..
Can not add sand in, its drainage effect is not as good as cinder, and it will harden after a long time. Finally, you can add some ashes after burning the grass. It contains potassium, which can make the branches stronger and the roots stronger.
It's not that you don't need to apply fertilizer after you have prepared nutritious soil. When it grows, it needs to be given proper fertilizer to meet its needs. The fertilizer should be rotten first. It should be added many times. The dosage should be light, otherwise it is easy to hurt the root. From May, we should add cake fertilizer to it every 15 days to help its branches grow. If it's a high temperature season, we should add calcium phosphate every 15 to 20 days. After September, we can add less nitrogen fertilizer, scorched marl, and help its flowers look more beautiful.