1. Loose piles have higher requirements on the environment and lower survival rate. The specific survival time cannot be determined. If the environment is right, it can survive for several months. If it is not suitable for its growth, it will probably not take root for several months.

2. It is best to dig the pine downhill pile every spring, and use soil balls when digging, so as to preserve its root system to the greatest extent. After the second wave of buds grows, it is basically certain that they can survive.