1, soil requirements
The root system of lemon has high requirements for water, nutrients and soil. Potted soil should be made into water-permeable, breathable, water-retaining and fertilizer-retaining, slightly acidic culture soil. Lemon is suitable for planting on warm gentle slope, with deep soil layer and good drainage. The most suitable soil pH value of lemon is between 5.5 and 7.0.
2, light and temperature
Lemon is a light-loving plant. However, if the sun is too strong, it will grow badly. Plants usually need to be replaced at noon. The annual average temperature suitable for growth is above 65438 05℃, and the optimum growth temperature is 23℃~ 29℃. If the temperature exceeds 35℃, plants will stop growing, and if it is -2℃, they will freeze to death. Lemons generally don't need to be cooled in summer. They enter the room before the first frost and leave the room after Qingming, so they can spend the winter safely.
water
Lemon needs more water in its growth and development, but too much water is not easy to rot its roots. Generally speaking, spring is the time when the buds germinate and the leaves unfold. The pregnant buds are in full bloom and should be watered properly. In summer, with strong sunlight and high temperature, more water is needed. But it should be timely and appropriate. Autumn is the period when autumn shoots grow and fruits expand rapidly, so there must be enough water. The late autumn and early winter are the stage of flower bud differentiation, and the basin soil is dry.
Step 4 apply fertilizer
Lemons like fertilizer. In the growing period, in addition to applying sufficient base fertilizer on pots and changing pots, we should also adhere to the principle of applying thin fertilizer frequently. The frequency and amount of fertilization should be determined according to the growth and phenology. If liquid fertilizer is applied, it is best to use fully fermented cake fertilizer and water, and the ratio of cake to water is 1: 200. The soil in the north is alkaline, so ferrous sulfate can be added to the fertilizer solution to make a slightly acidic nutrient solution.
Extended data
Matters needing attention in planting lemon trees:
1, fertilizer and water management
After the lemon tree is planted successfully, nitrogen fertilizer should be used as topdressing in the first two years, but there should also be an appropriate amount of nitrogen fertilizer. Because excessive nitrogen fertilizer will lead to the white growth of lemon trees, resulting in the phenomenon of falling flowers and fruits. Pay attention to the application of compound fertilizers such as calcium, magnesium and phosphorus while using nitrogen fertilizer. In autumn, organic fertilizer is used as the base fertilizer of lemon tree to provide sufficient nutrition for the tree and promote flower bud germination, flowering and fruiting.
2, intertillage weeding
Intertillage and weeding are essential steps for planting lemon trees. The purpose of intertillage is to make the soil softer, especially before the high temperature and dry season in summer, and loosen the soil before the drought in advance to make the soil softer, which has a certain effect on reducing water evaporation. At least three times a year, at least ten centimeters each time, but be careful not to hurt the roots.
Step 3: Trim
Young lemon trees have strong growth ability and high flowering rate, and bent branches and backbone branches are easy to grow branches, which will affect the tree shape. Therefore, the pruning of lemon trees needs to be hung with ropes so that the auxiliary main branches are not bent. Wipe off the buds on the trunk and promote the development of lemon.
4, pest control
Lemons have strong resistance to pests and diseases, especially in the north, where the climate is dry and there are few pests and diseases. Mainly prevent pests and diseases, and pay attention to cleanliness and hygiene in cultivation management. There is dust on the leaves, so it should be washed with water. Ventilation and light transmission are also important.
References:
Baidu encyclopedia-lemon tree