Forsythia pseudoacacia likes warm growing environment and is not hardy to cold. The suitable temperature for its growth is from 18 ℃ to 26 ℃. In winter, the temperature is lower than 5 ℃ and it is easy to be damaged by freezing. The safety of overwintering should be above 5 ℃.
Forsythia pseudoacacia likes light and is more shade resistant. During the growth period of Forsythia pseudoacacia, it should be given sufficient light to grow well. Some of the varieties of flowers and leaves need to be exposed to more sunlight to be bright and beautiful. If the light is not enough, the color will be lighter and the ornamental will be reduced.
Forsythia pseudoacacia likes to be wet and can't stand drought. During its growth, it needs to keep sufficient water supply to meet the needs of plant growth. Pay attention to no ponding in the basin, especially the drainage in rainy season. In winter, keep basin soil dry and control watering.
During the growth period, the forsythia needs to consume a lot of nutrients, and it needs a lot of nutrients for flowering and fruit, so it needs to apply fertilizer frequently. During the growth period, the fertilizer mainly composed of nitrogen fertilizer is applied once every half a month to promote the growth of the plant; before the flowering period, some phosphorus fertilizer and potassium fertilizer are needed to promote flowering; after the flowering, the application of phosphorus fertilizer and potassium fertilizer can increase the ornamental of the fruit and prolong the time of fruit observation.
False Forsythia is more resistant to pruning. Frequent pruning is good for ventilation and light transmission of plants and trimming of plant types. When pruning, it can be combined with basin changing in spring. Some weak branches and diseased branches of Forsythia need to be cut to promote its better growth. After the false Forsythia blooms, if you need to keep fruit, do not prune. If you don't need to keep fruit, you can cut off the inflorescence, so that you can branch and blossom again.
Forsythia pseudoacacia can turn the basin once every 1 to 2 years in spring, and at the same time, it can change some new soil.
The main diseases and insect pests of Forsythia pseudoacacia are sunburn, caterpillar and aphid.
