Can bayberry trees be grown in the north? A detailed guide to planting methods and pest and disease control

Bayberry, also known as sheng sheng mei, bai di mei or shu mei, is a small tree or shrub of the genus Myrica in the family Myricaceae. Its fruit is sweet and tart, and it also has high medicinal and edible value, so many people want to plant a few by their front door. But is bayberry actually suitable for growing in the north? How do you plant it so it survives easily? And what pesticides should you use when pests and diseases strike? Here is a clear explanation all at once.

Can bayberry be grown in the north?

The answer is: not suitable for planting. Bayberry prefers a warm, humid, cloudy and misty climate, and it tolerates neither strong light nor cold. The basic moisture conditions and temperatures in the north fail to meet its requirements, so even if it is planted with great effort, it will be very difficult for it to grow normally. The most ideal site for planting bayberry is a north- or east-facing slope in mountainous terrain. The soil should be deep, loose, fertile and well-drained, and acidic loam is best. So to grow bayberry well, you still have to choose a plot that meets these conditions.

Planting time and methods for bayberry

Planting time is divided into spring planting and autumn planting: spring planting is carried out from February to early April, and autumn planting from September to November, with spring planting generally preferred. In Yunnan, Guizhou, Guangxi, Sichuan, Hunan, Jiangxi, Guangdong, Fujian and other places, you can also choose to plant during the period from October to late March of the following year.

As for planting density, a spacing of 4 m x 4 m or 4 m x 5 m between plants and rows is recommended, with 33-42 plants per mu, and a female-to-male plant ratio of 100:1 is ideal; if wild bayberry is already distributed locally, you do not need to specially allocate male plants.

Applying enough base fertilizer is key. Dig planting holes 80 x 80 x 60 cm, and apply about 50 kg of compost per hole, or 25-30 kg of barnyard manure, or 3-4 kg of cake fertilizer, plus 1 kg of superphosphate, and finally cover with 15-20 cm of fertile topsoil.

When planting, place the seedling in the center of the hole, let the roots spread out naturally, straighten it, then add fine soil, firm it with your feet or tap it firm with a hoe or other tool, water thoroughly to settle the roots, and finally cover the top with subsoil, mounded 20-30 cm above ground level, and it is best to bury the graft union below the soil. After the seedlings are planted, during the high-temperature season in July and August, loosen the soil and water in time, and provide good mulch over the root zone to reduce water evaporation.

How to control pests and diseases? What pesticides to use?

The main disease of bayberry is brown spot disease, also known as anthracnose. It is an important disease damaging the leaves, and in severe cases it causes a large amount of leaf drop, leading to insufficient tree nutrition and ultimately a decline in fruit quality. The pathogen overwinters as ascocarps in diseased leaves, and the disease begins from late March to early April of the following year. Plots with a shaded canopy, insufficient sunlight, poor soil, and a lack of potassium fertilizer and organic fertilizer suffer more severe disease. For control, do three things well: first, clean the orchard, and in autumn and winter, together with pruning, collect diseased leaves and diseased or pest-infested branches and burn or deeply bury them; second, strengthen cultivation management, properly manage soil, fertilizer and water during the growing season, and improve the tree's ventilation and light conditions through pruning; third, spray pesticides for control. At the early stage of disease, that is, after the flowering period ends, spray 1500 g per mu of 1 degree Baume lime sulfur mixture aqueous solution.

The main insect pest is the whitefly, which specifically damages young new shoot leaves, with more severe occurrence in June and July. Control methods: first, protect and use natural enemies such as ladybugs and parasitic wasps to implement pest control by insects; second, during winter and spring pruning, cut off dead branches and branches with high pest density, and burn them in a concentrated way to reduce pest sources; third, spray pesticides for control. In July, when the pest outbreak is severe, use 4.5% cypermethrin emulsifiable concentrate per mu for spraying, which can achieve a good control effect.