Cultivation methods and matters needing attention of Rosa davurica fruit
The best breeding time: Rosa davurica can be cut during the whole growth period, but it is best in May-June.
Best growing soil: loose and well-drained humus soil is most suitable for Rosa davurica.
Growth humidity requirements: Rosa davurica likes wet growth environment, but it is more drought-tolerant.
Optimum growth temperature: Rosa davurica fruit can bloom all year round at room temperature 15℃ to 20℃, and the winter temperature is not lower than 12℃.
During the wintering period, the leaves of Rosa davurica fell off completely at low room temperature and entered a semi-dormant state. At this time, watering should be strictly controlled to keep the basin soil dry. When the temperature is lower than 0℃, plants will die due to freezing injury. If the indoor temperature can be kept above 15℃ in winter, flowers will bloom all winter. Rosa davurica is an indoor flower suitable for northern autumn and winter planting.
Best growth light: roses like sunny environment, slightly tolerant of shade, but afraid of high temperature.
Rosa davurica fruit should have enough light all year round. During flowering, when the sunshine is sufficient, the bracts are brightly colored and the flowering period is long; The sun is not enough and the color is dim. If cultivated in the shade for a long time, it will not bloom or rarely bloom. Tiger thorn Li Xi is warm and not cold-resistant. Generally, the northern area leaves the house at the beginning of May and puts it in the sunny place, and enters the house at the beginning of 10 10, and puts it in the sunny place.
In summer, leaves will be more beautiful if they are maintained or shaded by 50% in a semi-shady place. Because the temperature is not very high in spring and autumn, it should be given direct sunlight to help it accumulate nutrients through photosynthesis. In winter, it should be maintained in a bright place indoors. Usually put indoors for maintenance, it should be placed near the southeast doors and windows to receive light. Every other month or one and a half months, it should be moved outdoors for maintenance for two months, otherwise the leaves will grow thin and yellow, and the new branches or petioles will be slender and in a state of collapse.
Matters needing attention in the breeding of Rosa roxburghii
Fertilization: During the growth period of Rosa davurica in spring and autumn, nitrogen and scale mixed fertilizer can be applied for 2-3 times. Rosa davurica don't like big fat. When putting or changing pots, you can put 3-5 horseshoes at the bottom of pots as base fertilizer. In the growing and flowering season, dilute liquid fertilizer can be applied once every half month.
Fertilizer should be applied sparingly. Apply thin fertilizer 2~3 times a year in spring. Fertilization can be reduced in autumn. Rosa roxburghii doesn't like thick fat. Generally, it is enough to apply 1 times pancake fertilizer water for 3~4 weeks during the growth period. Too much fertilization, especially too much nitrogen fertilizer, makes the branches white and long, and only leaves don't bloom. Applying 1~2 times of phosphorus and potassium fertilizer in bud stage will lead to more flowers and bright colors.
Key points of watering: Prunus davidiana is drought-resistant and moisture-resistant, so except in midsummer, the pot soil should be dry and moisture-proof, and the roots will rot if watered too often, which is the key to raising and feeding Prunus davidiana.
Rosa davurica is a succulent plant, which is drought-tolerant and should not be watered too much. If the basin soil is too wet for a long time, it will not only cause root rot, but also endanger the survival of plants, so it is better to water the basin soil a little at ordinary times. In summer, water evaporates quickly, so water is more suitable, but no water can accumulate in the basin. Too much watering at flowering stage will cause falling flowers and buds, and even cause rotten roots.
During the high temperature period in summer, people often enter a dormant state, requiring little fertilizer and water, and even controlling fertilizer and water. Outdoor maintenance interval is about 3-5 days, and indoor maintenance interval is about 4-7 days. The watering time should be arranged in the morning or evening when the temperature is low. Spray plants often, too.
Pruning essentials: the flowers of Rosa davurica are at the top of the new branches. In order to make Rosa davurica blossom more, it is necessary to prune it properly. Because the main branches are too long and there are few flowers. Therefore, after flowering, branches that are too long and grow irregularly should be cut short. Generally, two new branches will grow under the incision of the branches, and they will bloom when they grow to 5~6 cm.
Prune Rosa davurica fruit 1 time every year, and after a few years, the whole plant will be full of bright little red flowers. Because the branches are slender and soft, with the growth of plants, bamboo sticks or iron wires can be tied into brackets with different shapes, and the branches can be tied to them to make styles, which can better show the beauty of red flowers and green leaves in bloom. If it is not pruned in time and allowed to grow naturally, its main branches will grow longer and longer, which will not only lead to fewer flowers, but also make the plant shape unsightly.
Cultivation methods and precautions of Rosa davurica fruit: change the soil in the pot: flower lovers who have the conditions can mix humus soil with one third of sand and plant it in the pot, and turn over the pot to change the soil every 2-3 years. Of course, other soils can also be used, and the requirements for soil are not strict.
When the seedlings are potted, put 2-2cm thick coarse-grained substrate or ceramsite at the bottom of the pot as the filter layer, sprinkle a layer of fully decomposed organic fertilizer with a thickness of about 1-2cm as the base fertilizer, then cover a layer of substrate with a thickness of about 1-2cm, and then put in plants to separate the fertilizer from the roots to avoid burning the roots.
The base of the upper basin can be one of the following. Vegetable soil: slag = 3:1; Or garden soil: medium coarse river sand: sawdust (shavings) = 4:1:2; Or one of paddy soil, pond sludge and humus soil. Or peat perlite ceramsite =2 parts, 2 parts, 1 part; Vegetable garden soil residue =3 portions 1 portion; Peat residue ceramsite =2 parts, 2 parts, 1 part; Coarse river sand in sawdust vermiculite =2 parts, 2 parts, 1 part. After the basin is finished, water it once and maintain it in a slightly cool environment for a week.
Breeding points: Rosa davurica is mainly propagated by cutting. Cutting can be carried out throughout the growth period, but May-June is the best, with high survival rate, and Rosa davurica is the easiest to survive. Select stout branches, about 10 cm to 15 cm long (with 3-4 leaves), air dry the white pulp flowing from the incision, coat it with plant ash, and dry it in the shade for 2-3 days. After the wound is dried, insert it into the plain sand, pour it thoroughly, and then water it less. The pot soil is slightly dry, and it takes about 50-60 days to grow roots.
Pest control: In the rainy season, because of much rain, high air humidity and unclean soil surface, Rosa davurica is prone to root rot and stem rot.
Control method: root rot can be used to irrigate the roots. Stem rot can be sprayed with agricultural streptomycin or Likujing. Spray with 800 times of 50% captan every half month 1 time. Disease should be mainly prevented, and it can be moved to places where rain can't reach in rainy season. Pour out the accumulated water in the basin in time to keep the surface of the basin clean. Do not apply organic fertilizer in rainy season. You can avoid its disease.
insect pest
Mainly whiteflies and scale insects.
Control method: Bemisia tabaci can be sprayed with chlorpyrifos or imidacloprid. Spray with 50% chlorpyrifos EC 1500 times. There are few scale insects, so it is enough to catch them manually.
Propagation method of Rosa davurica
Rosa davurica is propagated mainly by cutting.
Cutting propagation, cutting substrate: nutrient soil or river sand, peat soil and other materials used for cutting. It is difficult to get an ideal cutting medium for home cutting because of the limited conditions, so it is suggested to use a prepared and disinfected cutting medium; Medium and coarse river sand can also be used, but it should be washed with clear water several times before use. Sea sand and river sand in saline-alkali areas are not suitable for the growth of flowers and plants.
In the growing season of early spring or late autumn (the highest temperature at noon is not higher than 28℃, and the lowest temperature at night is not lower than 15℃), cut off leaves or stems (with 3-4 leaf nodes), insert the wound into the substrate after drying, and spray the cuttings and substrate slightly. As long as the substrate is not excessively dry or flooded, roots and new buds can grow rapidly.
When the temperature is high in late spring and early autumn, cuttings are easy to rot, so it is best not to carry out cuttings.
After taking out the pot, gradually remove it from the shade and place it in a sunny, ventilated and cool place. Usually don't water too much or too often, but enough water should be used in the spring and autumn growth period? If you don't do it, you will fall completely. The principle of timely watering. Usually water every 3 to 4 days, that is, wait until the soil is slightly dry before watering. Never water it, especially in flowering period, otherwise it will easily lead to falling flowers and rotten roots. In summer, due to the high temperature, water once a day, and the soil should not be too dry. If the pot soil is too dry, it is easy to cause leaves to fall off.
When entering the dormant period, the basin soil should be kept dry. Generally, it is watered once every 1 to February, and the basin soil is in a wet state. Fertilize from the beginning of April to the end of September. If the soil moisture is kept moderate and the nutrients are supplemented in time, Rosa davurica can continue to bloom, and if the temperature is above 15℃ in winter, it can also continue to bloom. In order to meet the needs of cultivation, the long branches of plants are often cut short to sprout new buds at the incision, or tied into various shapes with lead wire or bamboo chips to form beautiful and reasonable plant types, so as to improve the ornamental value of tiger plums and thorn plums.
The branches of Rosa davurica are not easy to branch, but will grow very long, with few flowers and messy posture, which will affect the appreciation. Therefore, they should be pruned in time every year to make them grow more new branches and flowers. Generally, two new branches can be born after pruning.
Rosa davurica has a well-developed root system and vigorous growth, which can be used as the rootstock for grafting fairy finger and crab claw orchid, but it belongs to shallow root system and spans far, with few root hairs.
Pruning method of Rosa davurica fruit
For the pruning of Rosa davurica, it is more because the plant of Rosa davurica is too big and it is very helpless to prune it. In fact, Rosa davurica has the habit of flowering at the top of branches, so pruning can promote branches and achieve the purpose of flowering more. Pay attention to wearing gloves when pruning.
Although pruning can promote branching and blossom more, the beautiful plant shape can not be ignored. Pruning of Rosa davurica is mostly carried out during the peak growth period from June to July after the flower season. For the pruned branches, Huayou can be used as cuttings to cultivate new potted Rosa davurica fruit.
For Rosa davurica seedlings, pruning should be based on forming skeleton as soon as possible. When the seedlings grow to 10 cm, the tops of branches can be cut off to promote the development of lateral branches; After that, when the lateral branches grow to a certain height, the top of the branches will be cut off, and the lateral branches will be lifted again to form a basic backbone branch frame.
When Rosa davurica has 4 ~ 5 branches, a long-term cultivation goal should be designed in advance, or tied into a ball, flower screen, or flower basket. Then erect a pole bracket according to the established goal and bend the branches properly to make them develop directionally.
For the bound Rosa davurica fruit after shaping, except for the prominent damage of individual shaping branches, it can generally be lightly cut or not trimmed, as long as attention is paid to proper bending and shaping. This is because twisted branches can also stimulate the apical advantage of plants. If you want a part of the branch to expose new branches, bend it downward so that the top of the branch is lower than the bend, so that 1 ~ 3 new branches will grow at the junction soon.
The experience of Rosa roxburghii
There are still differences between north and south in the cultivation of Rosa davurica, but in general, it is enough to pay attention to the light and temperature, give it sunshine all year round, and keep the room temperature above 12 degrees in winter, so that Rosa davurica can keep a beautiful flower in winter and spring.
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