Pruning is best in winter. The short branches of hawthorn are easy to form flower buds, so it is necessary to remove weak branches, leave strong branches, sparse over-dense branches, and remove overlapping branches and cross branches.

Hawthorn trees should be pruned mainly in winter.

The pruning principles of hawthorn trees should be flexibly mastered according to the characteristics of species and varieties, environmental conditions, fertilizer and water management level, tree potential and branch potential, and cannot be stereotyped.

When shaping young hawthorn trees, the trunk should be low and the opening angle of backbone branches should be large to make full use of light and heat resources and space; Reasonable use of auxiliary branches, maintain a moderately strong tree crown, good ventilation and light transmission conditions. When young hawthorn trees grow too vigorously, fewer flower buds are formed and the fruit setting rate is low; When the tree is flourishing, there are many flower buds, but the quality is poor, the fruit setting rate is low, and the flower and fruit drop are serious; Only by maintaining the golden mean can we achieve high yield every year.

The age of hawthorn tree is not obvious, but if it is pruned too much, its vegetative growth is too vigorous, its reserves are too small, or it bears too much fruit, it may bear fruit in different years. The nutritional growth of young hawthorn trees is generally more vigorous than that of apple trees and pear trees. If forced pruning into a tree shape, when the pruning amount is too heavy, it is easy to cause excessive growth, inhibit the formation of flower buds and delay the fruiting period.

Pruning of fruit-laden trees. Continue to cultivate pruning trees, improve the combination of leaf curtain units, adjust the surface condition of exposed leaf curtains, cultivate and update fruiting branches, overcome the phenomenon of fruiting in big and small years, strive for high yield, stable yield and high quality, and extend the full fruit period. Fine pruning should take measures such as cutting short, retracting, thinning branches, coring in summer and thinning inflorescences. Keep the ratio of fruiting branches to vegetative branches at 2: 3 or 3: 2. Take thinning or retraction to rejuvenate the fruiting branch group. Peripheral branches should be cut short, inflorescences should be sparse, and the growth of vegetative branches should be strengthened. Sparse and dense branches, overlapping branches, cross branches and combined branches.

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