Cultivation method of Dahlia, Dahlia is a common flower plant. Many people will cultivate some flowers at home because they are very ornamental, but it takes skill to raise a flower well. Let's share the cultivation methods of Dahlia and learn about it together.
Dahlia cultivation method 1 1, soil selection.
Dahlia is suitable for growing in loose, breathable, humus-rich and well-drained sandy loam. Garden soil, humus soil, sandy soil and bone meal can be used in cultivation, and the ratio is 5:2:2: 1, which can effectively avoid soil hardening, ensure air permeability and be more conducive to plant root growth.
2. Adequate lighting
Like light, not tolerant of shade, so we should ensure sufficient light when breeding, and it is best to put it on the balcony or windowsill facing south at home to promote photosynthesis and accumulate nutrients. Staying in the shade for a long time will lead to poor growth, weak color and even no flowering.
Step 3 water properly
Proper watering is very important in dahlia cultivation methods. It has no resistance to stagnant water. If you water it too carelessly, it is easy to rot the roots. In the seedling stage, water can be poured once a day on sunny days to keep the soil slightly wet. In the late growth stage, water consumption is intensified, and water can be replenished at night.
4. Rational fertilization
Dahlia bloom is big, bright and beautiful, but it consumes a lot of nutrients when it is opened, so topdressing should be done well when it is maintained. Generally, dilute liquid fertilizer is applied once every half month at seedling stage. Phosphorus can be topdressing once a week after germination, and fertilization can be stopped after flowering.
5. Temperature situation
The optimum temperature for dahlia growth is between 10℃ and 25℃, and too high temperature will have a certain impact on the plant. When it is hot in summer, it should be moved to the shade or indoor shade for maintenance. If the temperature exceeds 25℃, spray water on the blades to increase humidity. When the temperature is lower than 65438 00℃ at night, the temperature should be increased.
Cultivation method of Dahlia 2
Dahlia has colorful flowers and colorful petals. In addition to color, dahlias in full bloom are as eye-catching as chrysanthemums and sunflowers. It can adapt to the climate and soil quality in different regions, is easy to manage and breed, and is very suitable for novice flower lovers to cultivate. Of course, the perfect Dahlia still needs the careful cultivation of a willing heart!
First, Dahlia potted management
1, management of watershed soil
Dahlia is suitable for loose sandy loam with rich humus and good drainage. Generally, the soil for planting potted dahlias is cultivated soil made of vegetable garden soil (50%), humus soil (20%), sandy soil (20%) and dry manure (10%). The hardened soil is easy to cause waterlogging and root rot, so it cannot be used. In daily management, the soil should be loosened in time to eliminate the waterlogging in the basin, because the soil moisture content is too high and the air permeability is poor, and the fleshy roots of Dahlia will rot.
2. Adequate lighting
Dahlias like light, but they are not tolerant of shade. In the humid environment with insufficient light, the root system is weak, the absorption capacity is reduced, the photosynthesis of leaves is low, the flower buds are stunted, the small color of flowers is dark, and even it is difficult to bloom. If there is a serious lack of light for a long time, plants will weaken and eventually die. Therefore, Dahlia cultivation environment should be kept sunny in order to grow and develop normally and produce gorgeous flowers.
Dahlias prefer warm and cool, and avoid hot summer and high temperature. The suitable growth temperature is 20-25℃. So dahlias grow well in late spring, early summer, late autumn and early winter. In the hot summer from July to August, the growth is slow, and the flowering is not good or stops. Therefore, Dahlia should pay attention to water supply and seedling protection in hot summer. Cut off the residual flowers and branches in time after the flowers wither, but don't dry them right away. After the summer heat in September, leave 2 ~ 3 nodes at the base of the old stem to promote the germination of autumn buds, so that after the end of 10, huge and bright autumn flowers can be produced.
Step 3 drink water at the right time
Dahlia is not drought-tolerant and waterlogged-tolerant. Generally, potted plants are watered when they see dry soil, so that they can see dry when they see wet. You can empty the basin and drain it in rainy days.
Dahlia likes water but avoids water, and is afraid of both waterlogging and drought. This is because big flowers are fleshy roots, and if they are watered too much, they will rot easily. However, dahlias are luxuriant in foliage and evaporation, and need more water. If you fail to replenish water in time after wilting due to lack of water, and then expose to the sun, the edges of the leaves will be scorched, and in severe cases, the leaves at the base will fall off. Water should master the principle of "dry and thorough watering". Generally, in the early stage of growth, the water demand is limited, and it can be watered once a day on sunny days to keep the soil slightly wet. Too dry and too wet is not appropriate. In the late growth stage, the branches and leaves are luxuriant and consume more water. It is sunny or windy. Note that it is easy to lack water at noon or at night, and the amount of watering should be increased appropriately.
4. Rational fertilization
Dahlia is a kind of fertilizer-loving flower. Generally, dilute liquid fertilizer is applied once a day from seedling stage to 10- 15. Apply once every 7- 10 days after germination. When the buds are completely colored, stop watering. Fertilization is not suitable when the temperature is high. The amount of fertilizer applied depends on the growth of plants. Where the leaves are bare, it is a phenomenon of lack of fertilizer; On the other hand, if fertilization is excessive, the leaves will be brown at the edge or yellow at the tip, and the leaves will be thick and dark green, which is a suitable manifestation of fertilization. It is required to increase the concentration of fertilization every time, so that the stem can become strong.
Step 5 control the number of flowers
Dahlia flowers with large flowers will lead to poor quality and short flowering period, so it is necessary to control flowers properly. Let's start with seedling shaping. When the height of planted seedlings is about 10 cm, leave 3 ~ 5 leaves to pick the core to promote branching. In the growth period of branches, axillary buds are constantly erased, only the terminal buds are kept, which promotes the robustness of branches. After budding, except for the strong buds at the top of branches 1, the extra buds should be thinned out to ensure the spectacular flowers.
6, plastic and pruning
The pruning of potted dahlias should be flexibly mastered according to the varieties. Generally, large varieties use single shaping, and medium varieties use four shaping. The unique plastic surgery is to keep the terminal bud, remove all the fu-organ buds, concentrate nutrition, and form a unique dahlia with low plants and big flowers. This dahlia is a potted dahlia with four stems and four flowers. The seedling is pitted, and two bases are reserved to form four lateral branches with terminal buds on each side.
7. Insert the pole that supports the plant.
Dahlia's stems are hollow and brittle, and are easily blown down and broken by the wind. Bamboo should be inserted in time to support them. Inserting bamboo can also avoid the growth and bending of branches and improve the ornamental value of potted plants. When the plant grows to more than 30 cm, insert a small bamboo next to each branch and bind it with hemp thread (or string); As the plant grows taller, the longer bamboo cuttings should be replaced in time, and the last inserted bamboo should be placed at the lower part of the bud.
8. Protect plants from overwintering safely
Dahlias are not cold-tolerant (mainly because their roots can't freeze). In June165438+1October, when the branches and leaves wither, the aboveground parts should be cut off, moved indoors and preserved in the original pot. You can also take out the root tuber and air it for 1-2 days, then bury it in indoor wet sand with the temperature not exceeding 5 degrees, and then plant it in a pot in the next spring.