Maintenance methods of dwarf varieties of Dahlia

If you want to dwarf Dahlia, you can achieve it by controlling water, picking the heart and eating dwarf. generally, potted dahlias will be cultivated with Aishen varieties, and cutting methods can be used for reproduction. So how to maintain the dwarf varieties of Dahlia?

Dahlia dwarf variety

It is appropriate to use a small basin with a caliber of 10 cm for the first time, and then plant it in a large basin with a caliber of 25 cm when the seedling is as high as 15 cm. Pot soil can be mixed with 5 parts of garden soil, 3 parts of river sand and 2 parts of compost soil. Pot bottom cushion about 3 cm thick coarse sand, add a small amount of rotten cake fertilizer powder, fertilizer slightly covered with culture soil, and then planted with soil seedlings. In the growing season, watering should be dry and wet, and if it is not dry, it will be watered thoroughly. Adequate light should be given during the growth period to prevent the stalk from being slender. Dahlias prefer fertilizer, so it is advisable to apply thin cake fertilizer once every semimonthly during the growth process, change to once a week after budding, and spray 0.2% potassium dihydrogen phosphate once or twice. It is in a semi-dormant state in the hot summer, so it is necessary to suspend fertilization, increase ventilation and spray water to cool it, so as to create a cooler environment for it. Because of its large flower head and hollow stem, the flower stem should be fixed in time. In order to promote its strong flower head, it is necessary to carry out flower thinning in time, and cut off the abortive stem of the remnant flower as soon as possible. After the aboveground stems and leaves withered at the end of autumn, the roots can be poured out, cut off the stems and leaves, stored in the slightly moist sand in the cold room, or retained in the basin soil to survive the winter, but the room temperature should not be lower than 3 ℃ to 5 ℃.

The Culture method of Dahlia how to raise Dahlia

Dahlia is native to the tropical plateau of Mexico at an altitude of 1 500 meters. it is neither cold-resistant nor afraid of heat. Nali has a warm and cool climate and dormancy during a period of low temperature. Dahlia grows well in Liaoning, Jilin and other places in China. It is also planted in the Yangtze River Basin and the south of the Yangtze River.

Cultivation techniques

Split root propagation: because Dahlia has a root neck-like root as a vegetative form, it must be divided with part of the root neck and root, otherwise it can not germinate new plants. In order to facilitate reproduction, the method of burying roots in advance is often used to accelerate budding, and then split and planted after the adventitious buds on the root neck germinate. The root-splitting method is simple and easy, the survival rate is high, the seedlings are strong, but the number of propagation plants is limited.

Cutting propagation: it is the main propagation method of Dahlia, with a large propagation coefficient, which is generally carried out in early spring, summer and autumn, and the survival rate is the highest from March to April in the greenhouse or hotbed. The cuttings were taken from the tuberous roots which had been accelerated, and the cuttings could be peeled off from the base when a pair of leaves at the base of the new buds were unfolded. You can also leave more than one section at the base of the new buds to cut, and then take the buds at the axillary buds with the growth, so that more cuttings can be obtained. The spring seedlings grow fully in summer and autumn and can blossom in the same year. Buds can be taken from growing plants for summer cutting from June to early August, but the survival rate is lower than that in spring. The survival rate of cuttings from September to October is lower than that in spring, but higher than that in summer. It is suitable to insert soil with sandy loam and a small amount of rotten leaf soil or peat.

Seed propagation: limited to flower bed varieties and breeding applications. Summer is often due to damp and hot and poor fruiting, so many seeds since autumn cool mature. Double-petal varieties are not easy to obtain seeds and must be assisted by artificial pollination. The sowing was carried out in the sowing box at about 20 degrees, sprouted and unearthed in 4-5 days, replanted after the true leaves grew, and flowered 1-2 years later.

Cultivation and management: the stem of Dahlia is succulent and tender, and a pillar should be set up to prevent wind break, while dwarf varieties are not necessary. Watering should grasp the principle of dry and re-watering, after continuous cloudy days in summer, suddenly clear, should be timely spraying water to the ground and leaves to cool down, otherwise the leaves will have scorched edges and withered yellow. When there is no rain in summer, in addition to watering every day, water should also be sprayed to cool down. After bud development, liquid fertilizer is applied every 10 days until the bud is clear. Leave 10-15 cm root neck before frost, cut off branches and leaves, dig up the root, dry it on the spot for 1-2 days, and store it indoors with dry sand. The temperature of the storage room is about 5 °.

It is better to change pots for potted dahlias. Choose a shallow basin with a large mouth, and chisel the drainage hole at the bottom of the basin as big as possible, with a layer of broken tiles underneath as a drainage layer. The cultivated soil must contain half of the sand. The last pot change requires sufficient base fertilizer to provide adequate nutrition, and other management will be planted in the same place. Dahlia is used for cut flowers, the main points of cultivation are planted in the same place, the plant spacing is 50cm to 100cm, liquid fertilizer is topdressing once in half a month in the peak growing season, proper coring and more lateral branches are retained.

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How do you raise dahlias? Culture methods of Dahlia

Dahlia, with long flowering period, large and colorful flowers and many flowers, is very beautiful and has high ornamental value. How to raise dahlias? Next, I would like to introduce to you how to cultivate dahlias.

Culture methods of Dahlia

1. Soil: dahlia is the most suitable for growing in loose, fertile, well-drained sandy loam. It needs rotation and medium fertility. PH6.7-7.8 can grow well.

two。 Sunshine: dahlias like light and are not tolerant to shade. If placed in a shady place for a long time, they will grow poorly, have weak roots, thin leaves and thin stems, small flowers and light colors, and even cannot blossom. Therefore, dahlias should be placed in a sunny place. The leaves need sufficient light during the growing period, and the daily light is required to be more than 6 hours, so that the plants are strong and the flowers are large and plump. If the sunshine is less than 4 hours a day, the branching of stems and leaves and the formation of flowers and seedlings will be affected to a certain extent, especially if there is little sunshine, the flowering is not smooth, the growth of stems and leaves is poor, and it is easy to get sick.

3. Temperature: the nature likes the cool climate, the request to the ecological factor is not strict, so the adaptability is strong. During the growing period, the temperature is not strict, it can grow normally between 5-35 ℃, but 10-25 ℃ is the most suitable.

4. Watering: the amount of water can control the height of the Dahlia plant. Its moisture should be controlled in the seedling stage to promote its dwarfing. In summer, in order to reduce the temperature, increase the air humidity and reduce the water evaporation of Dahlia stems and leaves, water should be sprayed 1-2 times a day. Watering once at 3-4 p.m., the amount of water should not be too large.

5. Fertilization: Dahlia likes fertilizer, topdressing should be applied once in 7-10 days during the growth period, or dilute liquid fertilizer should be applied 2-3 times. However, because dahlias are afraid of heat, they are often in a semi-dormant state in summer, and there is no fertilization or extremely thin fertilizer at this stage. After the plant budding, the application amount of phosphate fertilizer can be increased to make the flower bloom better. The root system of Dahlia is delicate, and thick fertilizer is avoided in the whole growth process.

6. Insect pests: the main pests in dahlias are powdery mildew, gray mold, bacterial wilt, virus disease, borer moth and other pest problems, which should be sprayed regularly.

7. Pruning: to cultivate small and medium-sized flowers, remove only the lateral buds on the lower nodes of the stem to make them blossom one after another. If you want to cultivate large single flowers, only the apical buds should be retained and the rest of the lateral buds should be removed. At the end of June and the beginning of July, after the first flowering, the weather is getting hotter and the plant growth slows down, which can be pruned at this time. When pruning, the stem should be twisted and drooped in the middle of the branch and between the two leaves, leaving a height of 20-30 cm. A few days later, part of the wound dried up and then cut. This can prevent Rain Water from pouring into the hollow stem and causing rot. It can blossom again until October.

Matters needing attention in Dahlia Culture

1. Avoid soaking water: Dahlia root system is thick and succulent fleshy root, strong gas, so the soil must be loose and breathable, good drainage, if the soil hardening, waterlogging hypoxia, it is easy to cause rotten roots, or even death. However, Dahlia has many flowers and leaves, and a large amount of water is consumed by transpiration, and a certain amount of water is needed. If the leaves are wilted by high temperature drying, they should be watered immediately, subject to a thorough watering, and must not be overwatered to prevent waterlogging. Dahlia leaves may wilt when it is sunny after rain, mainly because the potted soil is too wet, the root hair is damaged, can not absorb water, coupled with leaf transpiration water loss, but at this time do not immediately watering, you can carry out multiple foliar spraying. After the soil is slightly dry, new roots grow and the absorption function is restored, it can be watered normally.

two。 Avoid shade: dahlias like light and cannot bear shade. In the environment of lack of light and damp, the root system will be relatively thin, the absorptive capacity will decrease, the photosynthesis of leaves will also decrease, the flower bud development is incomplete, the flower color is dark, and even it is difficult to bloom. If the lack of light is longer in Jinan, the plant becomes delicate and easy to die. Therefore, in the process of planting dahlias, the environment should ensure sufficient vision in order to grow and develop normally and produce gorgeous flowers. In the shady and humid environment with insufficient light, the root system is weak, the absorption is decreased, the photosynthesis of leaves is low, the flower bud is dysplastic, the flower is small and dark, and it is even difficult to bloom. If there is a serious lack of light for a long time, the plant becomes weak and eventually dies. Therefore, the cultivation environment of Dahlia should be sunny enough in order to grow and develop normally and produce gorgeous flowers.

3. Avoid thick fertilizer: Dahlia has a strong root system, many branches and leaves, and a large amount of fertilizer. When planting, we should not only apply a sufficient amount of base fertilizer, but also topdressing at the right time. Topdressing should apply light fertilizer frequently and avoid applying thick fertilizer to prevent burning roots and causing withered branches and dead seedlings.

4. Avoid extreme heat: dahlias like to be warm and cool, avoid hot heat, and the suitable growth temperature is 20 to 25 ℃. Therefore, Dahlia grows well in late spring, early summer, late autumn and early winter. But from July to August, the temperature rises, expands slowly, blossoms poorly or stops blooming. Therefore, dahlias should pay attention to water supply in summer to ensure the healthy growth of seedlings.

5. Avoid too many flowers: too many large dahlia flowers will lead to poor flower quality and short flowering period, so it is necessary to properly control the flowers. Therefore, from the beginning of plastic surgery, it is necessary to pick the heart and promote the branches. when the branches grow, constantly erase the small buds, keep only the terminal buds, and promote the branches to be strong. After budding, in addition to keeping a strong bud in the branch, just cut off the extra buds to ensure that the flowers are big and gorgeous when they bloom.

The above is the introduction of dahlia culture methods, like Dahlia friends, you can refer to the above breeding methods, reasonable breeding.