Do winter roses need pruning
Winter is approaching, and rose maintenance has entered a critical period. As a perennial flowering plant, winter pruning of roses directly affects the amount of flowers and plant health in the coming year. Scientific and reasonable pruning can not only help roses survive the winter safely, but also stimulate the germination of new branches, create beautiful plant types, and make spring flowers bloom more luxuriantly. The necessity of winter pruning of roses Winter pruning is the core link of rose maintenance and has three important functions: first, it can remove sick and weak branches and prevent pests and diseases from wintering; secondly, it can improve ventilation and lighting through pruning to reduce nutrient consumption; the most important thing is accurate pruning. It can regulate the number of flowering branches and double the number of flowers. However, it should be noted that the pruning intensity should be appropriately reduced during the seedling stage of roses and newly planted plants that year. The best pruning window for handling regional differences between north and south during the golden period of rose pruning is from December to February of the following year. Specific adjustments need to be made according to the region: the northern cold areas should be completed before the soil is frozen (before mid-December) to avoid damage to wounds caused by extreme cold; Jiangnan region can be postponed to January; it is recommended to implement it in February in the warm zone of South China. The judgment criterion is that the plant has completely entered the dormant period and the leaves naturally fall off. At this time, pruning has the least stimulation to the plant. When special weather response plans encounter a warm winter climate, it is recommended to prune in stages: first remove dead branches, and then finely prune them when the temperature stabilizes below 10 ℃. In case of rainy or snowy weather, work should be postponed to keep the incision dry to avoid infection. Detailed explanation of rose pruning technology The basic pruning rule adopts the principle of "three cuts and three stays": cut off dead branches, sick branches, and cross branches; retain strong main branches, new basic branches, and outward buds. Moderately pruned adult plants, retaining 15 - 20 cm of the trunk, and the incision is on a 45 ° slope and located 0.5 cm above the bud point. The main vines of vine roses need to be retained and only the lateral branches trimmed. Special plant type treatment requires a renewal pruning method for roses over 5 years old: 1/3 of the old branches are cut off year by year to stimulate the germination of new bamboo shoots at the base. The focus of the cluster roses is to prune the inner branches to maintain the umbrella-shaped structure; when pruning the tree-shaped roses, the complete umbrella crown should be retained and the rootstock sprout removed. Special pruning shears are used for tool disinfection and maintenance, and 75% alcohol is used for disinfection before and after each pruning. Wound healing agents should be applied to incisions with a diameter of> 2 cm to prevent the invasion of bacteria. Clean up fallen leaves and residual branches in time after pruning, and spray stone sulfur mixture on the ground for disinfection.
Mastering the techniques of pruning roses in winter can allow the plants to accumulate sufficient nutrients. With spring water and fertilizer management, you will have a surprise in the coming year. Regularly observe the pruning response and gradually establish a pruning plan suitable for your own roses, so that these garden queens can bloom more brightly.