1. Apply less fertilizer: apply too much fertilizer to gardenia, if it can't be absorbed, it will easily burn the root system, and the leaves will always turn yellow. At this time, you can pour more water, let the fertilizer flow away as soon as possible, and let it slow down.
2. More water: do not remember to water at ordinary times. If the plant is in a state of water shortage for a long time, it will always turn yellow. To water it regularly, so that it can grow in a slightly wet environment, when the air is dry, it should spray water properly
3. Open more doors and windows: the plants need to be ventilated and have bright light environment for growth. They always do not open windows, and the sultry environment will also make the leaves turn yellow. Need to open more doors and windows, so that plants can also breathe fresh air.
If the flower bud turns black, it should be pruned as soon as possible, otherwise the nutrient consumption will be accelerated. After pruning, it will grow new bracts, but pay attention to change the maintenance method. It is not sure to water it properly or the temperature of breeding is too low, the flower bud may be black, we should make appropriate changes according to the actual situation, such as controlling the water quantity or timely adjusting the temperature.