Lettuce likes cold growing environment and sunny growing environment. So it is feasible to keep it on the balcony. During curing, it is necessary to ventilate more so that the ambient temperature is between 18-22℃. Before planting, some base fertilizer should be applied to the soil to increase the fertility of the soil. This is more conducive to its growth. Water it more at ordinary times to provide it with a moist growth environment, but don't let water accumulate in the soil.