After planting poplar trees and watering them, will the poplar trees freeze to death if the weather gets colder to minus 5 degrees Celsius?

No.

Poplar saplings are afraid of freezing when watered at minus 5 degrees Celsius, but they will not die. Fertilizer can also be applied in the greenhouse. Based on the analysis report on the nutritional content of poplar growth, we learned that the growth of poplar trees mainly requires nitrogen, phosphorus, potassium, calcium and other substances. In the specific process of planting poplar trees, the types of nutrients added in poplar tree planting should be accurately grasped to fully ensure that adequate nutrient supply can be obtained during poplar tree planting. The development of various test flight tasks must also be based on specific circumstances, with reasonable control of their time and methods.

Poplar fertilization should be avoided as much as possible during rainy seasons to prevent rainwater from washing away the fertilizer. Under normal circumstances, various fertilization work is carried out in the early stage of transplanting poplar trees. You can use sea food water-soluble fertilizer to ensure that there are sufficient nutrients in the soil.