Tree-shaped Rose Maintenance and Pruning Methods
The article discusses the green plant flower planting content of tree-shaped rose maintenance and pruning methods, details are as follows:
Tree-shaped Rose Maintenance and Pruning Methods
The significance of pruning tree-shaped roses, any potted rose cannot do without pruning. Pruning not only improves the survival rate of new seedlings in pots, maintains the beauty of the plant's shape, but more importantly, it allows for the full and reasonable use of the limited nutrients in the potting soil, avoids excessive growth, and ensures that the plant's flowers and fruits exhibit the best breed characteristics. It also enhances the plant's resistance.
Attention should be paid to the following seven points when pruning roses:
1. -- Pruning of Cuttings --
From the color-showing stage of the bud to the beginning of petal shedding, the axillary buds under most rose stems are in a dormant state. During this period, cuttings can be made from the third node with three buds between the first set of five small leaves and the third set of five small leaves below the flower. Cut off the two sets of leaves at the bottom of the cutting, and the top set should have three leaves removed, leaving only the two basal leaves to maintain photosynthesis and act as an indicator of the cutting's vitality.
The top of the cutting should be cut diagonally parallel to the axillary bud with a sharp knife, with the distance to the bud equal to the diameter. This cut reduces the surface area of damage, prevents water accumulation, and reduces the chance of infection. The bottom should also be cut in the same manner.
2. -- Pruning of New Seedlings --
Newly planted rose trees also need to be pruned because the transportation process can cause root damage. The branches may also experience water loss, drying, skin pricks, and other mechanical injuries, which should be removed. Generally, two main branches and 4-6 flower buds are left on small seedlings. Excess axillary buds can be removed with a finger.
3. -- Pruning During the Growing Season --
Whether to retain the suckers emerging from the soil around the roots should depend on the plant's growth. They may develop into a main branch in the future but will also significantly affect the existing plant's growth. Handle them according to the actual situation. When pruning, remove the potting soil around the suckers and cut them with a sharp knife, leaving the cut exposed and not covered with soil or water.
If conditions allow, apply charcoal powder or any fungicide to prevent infection. During this stage, the plant grows rapidly and may produce intersecting, inward, and overlapping branches. Timely removal of suckers or cutting branches and removing weak branches can reduce unnecessary nutrient consumption and help maintain ventilation and light, as well as the plant's apical dominance.
4. -- Pruning During Flowering --
Roses should be thinned during the bud formation period to ensure that the main flower is robust and large, which can fully display the characteristics of the variety. The basic steps are: keep one bud at the top of each branch for fragrant roses (品种月季), and for multiflora roses (丰华月季) and multiflora mini roses, keep 2-3 clusters of about 5 buds at the top of each branch, and remove the rest of the buds when they are the size of mung beans with tweezers.
5. -- Pruning After Flowering --
Seedlings grown from rose seeds do not exhibit the same characteristics as the flowering mother plant. Except for horticultural breeding, spent flowers are usually cut off promptly to avoid unnecessary nutrient consumption and promote the next round of axillary bud germination. The axillary buds below the spent flowers can grow into weak branches, but they only produce very small flowers without ornamental value.
This has no significance in horticultural cultivation, so these branches must be cut off. Remember to cut off all branches above the first set of five small leaves below the flower. After this, the apical dominance will cause the topmost flower buds to differentiate into the best branches and leaves, and produce pure and high-quality flowers 45 days later.
6. -- Pruning in Autumn and Winter --
Roses are perennial deciduous shrubs that need to undergo low-temperature dormancy in northern winters to ensure better flowers the following year. Cut off the upper half of the tender branches when the weather cools to accelerate branch maturation. Remove all soil-grown suckers from the roots, increase the thinning of buds, and before dormancy, cut off all branches older than two years and remove all non-woody parts of the branch ends. Also, remove all leaves from the remaining branches, which can minimize the寄生 of various harmful fungi.
7. -- Pruning of Old Roots --
All organisms have a process of metabolism, and the root system is no exception. Potted roses need to be repotted after 2-3 years, and some of the epidermal lignified old roots and the fibrous roots growing from them can be cut off. The total amount of pruning should not exceed one-third of the entire root system. The purpose is to stimulate the root system to regenerate strong new roots.
The above is a detailed explanation of the maintenance and pruning methods for tree-shaped roses, hoping this article can provide you with help in green plant management!