1. There are two reasons why potted lemons should be pruned reasonably. First, the pot is small, the soil is small, and the nutrients provided are limited, which can not meet the needs of lemon growth and must be pruned.

Second, through pruning, the rational distribution of nutrients in the tree can be adjusted, so that limited nutrients can be supplied to buds and leaves to form more fruiting branches, thus achieving full flowering and fruiting branches. The density of potted lemons must be pruned before the spring seedlings germinate.

2. Raise flowers and fruits? After the lemon blooms, in addition to applying thin fertilizer once a week, the flowers and fruits must be thinned. Sparse some buds before flowering; After the flowers wither and set fruit, some young fruits in inappropriate positions should be thinned out to reduce the consumption of nutrients, so that the limited nutrients can be concentrated on the preserved flowers and fruits, and the fruits can grow bigger and better.

3, reasonable fertilization Lemon likes fertilizer, usually it should be a relatively thin fertilizer. Apply decomposed liquid fertilizer once before the plants germinate, and then apply liquid fertilizer mainly containing nitrogen every 7 ~ 10 days to promote more branches and leaves and more spring shoots. Fertilize in time after each coring to promote the early maturity of branches.

4, the harm of mites, because the temperature is rising now, it is the best time for mites to multiply and grow. It can cause defoliation after harm, which can be prevented by drugs such as chlorhexidine.

5, due to poor drainage, root water accumulation, serious root rot, plant death, the bottom of the flowerpot can be properly padded to facilitate drainage.

Extended data:

Lemon leaves contain flavonoids, coumarins and organic acids. Flavonoids Close-up atlas of lemon leaves, containing quercetin and phloretin. Among coumarin, there are umbelliferone, scopoletin and aesculetin.

Among the organic acids, there are ferulic acid, p-coumaric acid, salicylic acid, p-hydroxyphenylacetic acid, erucic acid, p-hydroxybenzoic acid, vanillic acid, gentisic acid and o-coumaric acid; It also contains vanillin. The above components mainly exist in combined form, in which umbelliferone, ferulic acid and salicylic acid exist in a small amount of free form at the same time.

The leaves also contain volatile oil, vitamin C- 1 19~232 mg% and pigments such as chlorophyll a, chlorophyll b, lutein and butterfly flavin.

References:

Baidu encyclopedia-lemon (rutaceae citrus)