The best temperature is about 15 degrees. It's afraid of cold, so it's necessary to prevent cold at the beginning of spring. You can't let it suffer from cold damage due to carelessness. At the beginning, you can keep it in a warm place indoors, wait for the temperature to stabilize and then go outside to have a good ventilation or sun exposure.
The general principle of watering it is "see dry see wet". That is to say, after the soil is dry, it should be watered thoroughly every time until the water flows out from the bottom of the basin. There should be no water in the basin, otherwise it will affect the growth.
Narcissus also have requirements for light. They need to guarantee about six hours of light every day to ensure that they can accumulate enough nutrients for the future. And the light of spring is very suitable, put in the balcony with good illumination to go..
Spring has begun to grow, can be appropriate to use some phosphate fertilizer, supplement nutrients, pay attention to help after, not too much, or it will play the opposite role.