The demand of multi ruby for light is strict. Lack of light will cause the leaves to grow longer and turn green. And the strong light irradiation will cause the leaves to be burned, and may even make them water. So in summer and other high temperature climate need to give it shade, but other seasons to give sufficient light
Multi headed ruby is suitable for growing in humid environment. The higher the temperature, the greater the water demand. In addition to watering every day in summer, it is necessary to spray water properly to keep humidity. You can also spray water on the leaves, and then cover them with plastic bags to keep the environment moist.
Long headed rubies cannot grow at low temperatures. If the temperature is too low, it will freeze or even die. In winter, you need to prepare thermal insulation measures, you can put it in a warm place indoors, or you can cover it with plastic bags.
Some rubies are single headed and need to be trimmed properly to make them long headed. I want to cut off some of the upper leaves, let its top bud show, and then cut the stem of the head. After cutting the top bud, apply carbendazim to the wound for disinfection and avoid water. After slowly giving light, you can grow buds on it.