The leaves and stems of my phoenix bamboo are slowly turning gray and still smoking. Can the teacher tell me what's wrong or that it's winter? My indoor temperature is 12 degrees.

Plants need photosynthesis. Flowers at home should be placed in a place where the sun shines, but in winter, the sun is blocked by clouds, so photosynthesis cannot be carried out, which will lead to death due to lack of nutrition. You should put the flowers in a sunny place, but not for too long, so ultraviolet rays will do harm to the plants. Generally, one day 1 to 2 hours, and you can't put too much water.