Planting Tips

Chapter 37 Why do potted plants need to be repotted?How to change basin
The operation of transplanting a potted flower plant to another pot for planting is called changing pots (repotting).There are two different situations when changing pots: one is that with the growth of the seedlings, the root group has filled the flower pot, and there is no room for further expansion in the original pot soil, so the growth is limited, and it should be changed from a small pot to a large pot in time. In the pot, the nutrient area of ​​the root group is expanded, which is conducive to the continued growth of the seedlings; the second is that the potted flowers that have been fully grown and cultivated do not need to be replaced with larger flower pots, but because of years of cultivation and long-term watering, The physical properties of the pot soil will deteriorate, the soil will become compacted and alkalized, poor ventilation, and lack of nutrients. Even if topdressing is often applied, the flowers and trees will not grow well. The purpose of changing the pot is only to trim the root system and replace the new culture soil. , can remain unchanged.

When changing from a small pot to a large pot, it should be gradually changed to a larger pot according to the size of the plant development. It is not easy to change to an oversized pot, because this is not only labor-intensive and material-intensive, but also difficult to water. Adjustment, the root system of the seedlings is poorly ventilated, and the growth is not full and the flowering is delayed.It’s not that the one- and two-year-old flowers in the greenhouse grow rapidly. Generally, the pots need to be changed 2 to 4 times from the time when the seedlings are planted to the flowering. delay flowering.Perennial flowers usually change once every 1 to 2 years, and woody flowers mostly change once every 2 to 3 years, depending on the species.Perennial flowers and woody flowers should be repotted in autumn when growth is about to stop, or before spring growth begins.The flowering habits of flowers should be considered, such as winter jasmine, green peach, wintersweet, camellia, etc., which bloom in early spring, can be changed after flowering.Jasmine, rose, hibiscus, pomegranate and other potted flowers that bloom on the branches of the year should be repotted in early spring.Generally, evergreen species can also be changed during the rainy season, so the air humidity is higher and the leaf surface water transpiration is less.

If the indoor conditions are suitable and the management is thoughtful, the pot can be changed at any time during the year, but it is not suitable to change the pot when the flower buds are formed and the flowers are in full bloom.When changing pots, the original pot soil should not be too wet or too dry.When the plant is taken out of the pot, use the index finger and middle finger of one hand to clamp the base of the plant, keep the palm close to the soil surface, hold the bottom of the pot with the other hand, turn it upside down, tap the side of the pot lightly with the palm, and the pot soil can be taken out.Then remove the drainage layer of the soil lump, and plant the outer fibrous roots in a large pot after a little dredging.When changing a flowerpot of the same size, part of the original soil lump can be cut off, some coiled roots and old roots can be cut off, and new cultivation soil can be filled.Some flowers can also be divided after changing pots.The operation of changing pots and maintenance management are basically the same as those of upper pots.After changing the pot, the soil must be kept moist. For the first time, it should be fully watered so that the roots and the soil are in close contact. After that, watering should not be too much, just keep it moist.

Because the root system is injured after changing the pot, water absorption is reduced, especially for pruned plants, when watering too much, it is easy to cause the root injury to rot.After the new roots grow, gradually increase the amount of watering.The pot soil should not be too much when changing the pot for the first time, otherwise it will easily die after changing the pot. Therefore, it is advisable to place the seedlings in a damp place for the first few days after changing the pot.Why do potted flowers need to be repotted regularly, family gardening with pine pot soil or in single-roof greenhouses, where the light mostly comes in from the south side. The direction in which the light enters is inclined to the south.The degree and speed of this deflection have a lot to do with the speed of flower growth.Fast-growing potted plants tend to deflect faster and to a greater extent.Therefore, in order to prevent the potted flowers from growing in one direction and destroying the well-proportioned and round plant shape, the direction of the flowerpot should be changed after a certain number of days so that the plants can grow evenly, and the plant shape and posture can be plump and beautiful.

For potted flowers placed in the open field, turning the pot can also prevent the roots from penetrating into the soil through the drainage holes. Otherwise, if the time is too long, moving the pots will easily break the roots and affect the growth.Loose pot soil, also known as skewer pot, uses bamboo slices or small iron rakes to loosen the soil surface that has been hardened due to continuous watering, so as to improve the aeration of the pot soil and remove moss and weeds on the soil surface.The formation of moss affects the air circulation of the pot soil, which is not conducive to the growth of plants in the pot, and the soil surface is covered with moss, which makes it difficult to determine the humidity of the pot soil and inconvenient to water.It is good for watering and fertilizing after potting.When loosening the pot soil, be careful not to damage the root system of the flowers, and the depth is appropriate.

(End of this chapter)