Why can't Hunan grow apples, pears and bananas?

Apple tree is a temperate fruit tree that likes low temperature and dryness. It requires no cold in winter and no heat in summer. The suitable temperature range is the annual average temperature of 9 ~ 14℃, the extreme low temperature in winter is not lower than-12℃, the highest monthly average temperature in summer is not higher than 20℃, the annual accumulated temperature is ≥ 10℃, and the average temperature in the growing season (April ~ 10) is about 5000℃. If the temperature in winter is too high, it can't reach the low temperature needed for winter dormancy, and the germination in spring is uneven. So it can't be planted in Hunan.

Bananas like hot and humid climate and thrive in deep soil, loose soil and well-drained land. Hunan is the central part, and the conditions are not satisfied.

As for pears, they can be planted in Hunan because of their strong adaptability, but they are generally not planted in large areas, because pears are generally planted in plain areas with deep and fertile soil and convenient irrigation. Otherwise, we will lose money.