Principle of changing flower pots

The purpose of changing pots is to improve the nutritional status of plants. Generally, one or two-year-old herbaceous flowers need to change pots once or twice before flowering. Perennial flowers change pots once a year; Woody flowers can be changed once every other year. For example, Milan, rose, jasmine, poinsettia and Fusang need to turn the basin once a year; Although camellia, orchid and Rhododendron grow slowly, they should also be turned every other year

For large-scale perennial potted flowers, due to the gradual development of roots and long-term watering, the soil in the basin will gradually decrease, the basin soil will gradually harden, the air permeability will gradually be worse than before, and the nutrients in the soil will gradually be insufficient. Therefore, even if large potted flowers still use the original pot, they should change the soil at least once every two years, trim some bad roots, excessively long and overgrown roots, rotten roots and roots invaded by diseases and pests, and add some new soil to facilitate the plant to continue to grow

It is best to change the pots of flowers during the dormancy period of flowers. The pots of woody and perennial flowers can generally be changed in March. It is advisable to turn the pots after flowering in early spring

Method for changing flower pots

When turning the basin, first pry the soil around the basin wall with a knife, turn the flowerpot with one hand, and then beat the basin wall to get the plants out, and hold the plants with soil with the other hand. Then use a knife to cut off part of the old soil outside the root system, cut off the bad roots and part of the old roots, replant them according to the method of pot, add new soil outside the soil ball and compact it, and then water it. The planting depth of flowers and seedlings remains the original condition. Perennial flowers can be divided while changing pots

When changing pots for large potted flowers, in order to ensure good drainage, reduce weight and facilitate moving, first lay a layer of furnace ash at the bottom of the pot, then lay a layer of soil, and put some fish scales and broken bones as base fertilizer, so as to maintain long fertility

Precautions for changing flower pots

1. In the process of making flower pots, the bottom hole often has a circle of upward edge. If this edge is not removed, it will affect the drainage in rainy season. It should be knocked off when changing pots. A plastic window screen can also be used to cushion the bottom of the basin to prevent grubs and earthworms from entering the basin

2. For the root soil lump poured out when changing pots, a sharp flower shovel must be used to cut off the outer layer of old roots, and the root topsoil also needs to be dug loose with a shovel. Otherwise, the root system is curved and does not extend around the basin wall, which is easy to be affected by drought, waterlogging, cold and heat changes, and the plant often does not develop well

3. After replacing the basin with new soil, the basin soil must be compacted to avoid caves in the basin soil after watering, which will affect the root system to absorb water. Moreover, the edge of watering must be reserved, and there can be no place to stop watering because the basin is full of soil

4. Be sure to water thoroughly. For the first watering of the basin, it is best to dip the basin method, put the potted flowers into the basin, and take them out and place them after the surface of the basin soil is wet. After the first watering, wait until the basin soil is dry and the surface turns white, and master the principle of "no watering without drying"< span>