All things are reviving, spring is warm and flowers are in bloom, and the air everywhere carries the scent of spring. After the Spring Festival, temperatures across China have been gradually rising, with some parts of North China already reaching as high as 20°C. Just after the Rain Water solar term, a sudden cold snap swept through northern regions, bringing late-spring cold weather to many areas—temperatures plummeted below 0°C, and some places even saw rain or snow, a stark contrast to the recent mild conditions. People had already put away their winter clothes, only to find themselves pulling them out again to stay warm. As for crops, what should they do when faced with this late-spring cold? Below, China Agricultural University offers practical advice on protecting your plants after rain and snow.
For overwintering crops in the field—taking winter wheat as an example—after a late spring cold snap, the first step is to promptly inspect the fields to assess frost damage. Frost injury is typically classified into mild, moderate, and severe categories. Subsequently, based on the extent of the damage, timely remedial measures should be implemented for moderate and severe frost injury. The specific remedial measures are as follows:
(1) Agronomic practices: intertillage to conserve soil moisture, raise soil temperature, and promote tillering.
(2) Apply fertilizer and water, and top-dress with a fast‑slow release fertilizer containing humic acid, such as… Agricultural University All-in-One (Urea-Ammonium Nitrogen Fertilizer) It can both raise soil temperature and rapidly promote tillering in wheat, while also prolonging fertilizer effectiveness and increasing the ear‑setting rate.
(3) Foliar fertilization is extremely critical, Agricultural University Crop Protection and Fruit-Protecting Foliar Fertilizer , which can both mitigate frost damage and facilitate the rapid recovery of wheat growth.
Facility-grown vegetables
In early spring, greenhouse-grown vegetables may suffer frost damage at different stages following a late-spring cold snap; accordingly, appropriate measures should be taken to address frost injury at each stage.
(1) Agronomic practices: For greenhouses with rain or snow accumulation on the roof, promptly remove it to ensure adequate sunlight exposure.
(2) During the seedling stage, for mild frost damage, no measures are necessary; simply encourage stunting to enhance cold tolerance. For moderate to severe frost injury, foliar spray with… Protect the harvest and safeguard the fruit; ensure healthy crops and thriving leaves. Wait to alleviate frost damage and restore growth. In addition, to prevent the occurrence of diseases, root irrigation can also be applied. Jun Chong Feng , enhance stress resistance.
(3) During the growth period, if damage occurs, combine this with greenhouse environmental management and apply a suitable flush application. Humic acid granules + Gui Gen Dao Di Liquid fertilizer, foliar spray application Protects crops and safeguards fruit, ensures healthy growth and robust foliage, boosts leaf vitality, and strengthens leaf vigor. Additionally, it can help alleviate frost damage, raise soil temperature, enhance root vitality, strengthen plant vigor, and promote growth. Furthermore, it can be used in conjunction with chemical treatments to prevent and control the occurrence of diseases.
For fruit trees that bloom early, such as apricot, cherry, apple, pear, peach, and kiwi, it is essential to carry out proper fertilization, irrigation, pruning, and winter‑care measures before the onset of late spring frosts. If these practices are not implemented in a timely manner and frost damage occurs, the following measures may be adopted:
(1) Agronomic practices: For fruit trees during the flowering and pollination period, if frost damage occurs, promptly carry out artificial assisted pollination on flowers that have not been damaged to increase fruit set.
(2) Fertilization and irrigation: For fruit trees severely damaged by frost, promptly apply quick-release fertilizers, such as… High-Nitrogen Compound Fertilizer 20-0-5 Wait, Potassium humate from mineral sources, humic acid effervescent granules Additionally, it can be combined with rooting liquid fertilizer. Ultimately Wait, which helps strengthen the fruit trees and stimulates the growth of new roots.
(3) Foliar application of foliar fertilizers, such as Potassium dihydrogen phosphate with mineral-derived humic acid, protecting crops and safeguarding fruit. Moreover, it enhances leaf photosynthesis, increases the supply of organic nutrients, and promotes fruit tree growth.
