Planting methods of potted dahlias

The planting method of potted dahlia, the key to the growth of potted dahlia is to strengthen the management of potted soil, give sufficient light, apply water and fertilizer frequently, and manage shaping and pruning in time.

(1) strengthen the management of basin soil. Dahlia is suitable for sandy loam which is loose, rich in humus and good drainage. Potted dahlia planting soil is generally suitable for vegetable garden soil (50%), rotten leaf soil (20%), sandy soil (20%) and dried dung (10%). The consolidated soil is easy to cause waterlogging and rotting roots, which can not be used. Daily management should loosen the soil in time and eliminate waterlogging in the basin, because the fleshy root of Dahlia has too much water content in the soil and the air is permeable. When it is bad, it will rot.

(2) light. Dahlia likes light and is not tolerant to shade. If it is placed in the shade for a long time, it will grow poorly, the root system is weak, the leaves are thin and the stems are thin, the flowers are small and light, and some even cannot blossom. Therefore, potted dahlias should be placed in a sunny place with more than 6 hours of light a day, 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 buds 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) watering frequently. Dahlia like water but avoid stagnant water, both afraid of waterlogging and drought, this is because Dahlia is fleshy root, too much watering root is easy to rot. However, Dahlia has luxuriant branches and leaves, large evaporation, and needs more water, if it can not replenish water in time after wilting due to lack of water, and then exposed to sunlight, the edge of the light leaf will be scorched, and the heavy basal leaf will fall off. Watering should grasp the principle of "dry and thoroughly irrigated". In general, water is limited in the early growth stage, and it can be watered once a day in sunny days, keeping the soil slightly moist, too dry and too wet are not suitable. In the later growth stage, branches and leaves are luxuriant and consume more water. In sunny or northerly weather, pay attention to the lack of water at noon or in the evening, and the amount of water should be increased appropriately.

(4) proper fertilization. Dahlia is a kind of fertilizer-loving flower, which is usually treated with dilute liquid fertilizer once every 10 to 15 days from the beginning of seedlings. Apply once every 7 to 10 days after budding, and stop watering when the bud is transparent. It is not suitable to apply fertilizer when the temperature is high, and the amount of fertilizer should be determined according to the growth of the plant. Where the leaf color is light and barren, it is the phenomenon of lack of fertilizer; on the contrary, if the fertilizer is excessive, the leaf edge is scorched or the leaf tip is yellow, and the leaf is thick and dark green, which is the performance of proper fertilization. The concentration of fertilizer should be increased each time, so that the stalk can be sturdy.

(5) shaping and pruning. The pruning of potted dahlias should be flexibly controlled according to the variety. In general, single-plant plastic surgery is used for large varieties and four-book plastic surgery is used for medium-sized varieties. Single plant plastic surgery is to retain the terminal bud, remove all the bowels, so that nutrition is concentrated, forming a low plant, large flower type of single plant Dahlia. The four dahlias are potted dahlias with four stems and four flowers, which are plucked from the heart of the seedling and retain the two basal nodes to form four lateral branches with top buds on each side.

(6) supporting plants by inserting poles. The stem of Dahlia is empty and brittle, and it is easy to be broken by the wind, so it should be supported by bamboo planting in time, which can also avoid the bending of branches and improve the ornamental value of potted plants. When the plant is more than 30 cm tall, a small bamboo should be inserted next to each branch and fixed with hemp skin (or string); as the plant grows taller and taller, a longer bamboo should be replaced in time, and the final bamboo should be placed on the lower part of the bud.

(7) protect the plant safely through the winter. Dahlia is not resistant to cold (mainly the root can not be frozen). In November, when the branches and leaves withered, the aboveground part should be cut off, moved indoors and preserved in the original pot, or the root can be taken out and dried for 1 or 2 days and buried in indoor micro-moisture sand, but the temperature is no more than 5 ℃, and the following spring will be planted in potted dahlia. the above is the introduction of the planting method of potted dahlia.

Potted dahlia technology, potted dahlia pictures

The long flowering period and beautiful flowers of dahlia can add a lot of spring and vitality to family life. Many families choose potted dahlias, but the potted techniques of dahlias are more complex than other flowers. Learn to cultivate dahlias scientifically in order to make them bloom and flourish. The following editor will take you to learn the potted techniques of Dahlia.

Ecological habits of Dahlia

Dahlia is native to the Mexican plateau and likes a warm and humid environment. The suitable temperature for growth is from 10 ℃ to 25 ℃. If the temperature is higher than 30 ℃, the growth is abnormal and the flowering is less. Freezing injury is easy to occur when the temperature is lower than 0 ℃. The suitable storage time of root tuber is 3 ℃ to 5 ℃. Dahlias are sensitive to water, intolerant of drought and afraid of stagnant water. Like plenty of sunshine, but avoid strong light, need proper shade. It is better to use loose and fertile mixed matrix for soil.

Propagation method of Dahlia

First, divide the stored root before propagation and germination, and pay attention to the germination point at the neck of the root. The one without the germination point can not form a new plant. When ramet, each root tuber should take 1 to 2 bud points, do not hurt the buds during operation.

Second, cuttage propagation open-air spring and autumn cuttings can be used in the greenhouse for four seasons. Cut the twigs from the robust mother plant and retain 2 nodes, each about 7 cm, with at least one strong axillary bud or terminal bud. Take vermiculite or coarse sand as the bed substrate, often spray water after insertion, shade 60%, take root in about 30 days, pot in 40 days, and blossom in 90 to 110 days.

Potted techniques of Dahlia

I. Seedling management

Pot: cuttings rooting Dahlia seedlings, grow to 8 to 10 cm high can be pots. The substrate was prepared with rotten leaf soil, river sand and organic fertilizer according to 3 ∶ 1 ∶ 1.

Watering: watering at the seedling stage should be appropriate and should not be too much to prevent overgrowth. Less evaporation in cloudy and rainy days, should be less irrigated; in sunny or dry and hot summer, evaporation is large, in addition to watering, foliar water spraying is needed once or twice a day, and ground water is sprayed to increase air humidity.

Temperature and ventilation: the optimum growth temperature at seedling stage is 22 ℃ to 28 ℃ daily temperature and 12 ℃ to 16 ℃ at night. Warm day and cool night are beneficial to the growth and development of Dahlia. In order to ensure the robust growth of seedlings, the excessive growth of seedlings must be prevented and ventilation should be strengthened during the day.

2. Pot management

Temperature: Dahlia likes cool environment, and the suitable temperature for growth is 10 ℃ to 25 ℃. If the temperature is higher than 30 ℃, the growth is abnormal and the flowers are few and small. When the temperature difference between day and night is about 10 ℃, the plant can be short and strong, and the growth and flowering is more ideal. Therefore, in greenhouse production, in addition to maintaining the appropriate temperature for growth, there should be a certain temperature difference between day and night.

Lighting: dahlias like light, sufficient sunlight can make its stems and leaves grow strong, blossom many and colorful. However, the direct light in summer will make the leaves rough and dull, even yellow leaves and dry edges, so they should be fully exposed in the morning and shaded by about 50% at noon and afternoon.

Watering: dahlias are sensitive to water, are not resistant to drought, are afraid of stagnant water, and have a lot of precipitation in the rainy season, which is extremely disadvantageous to the growth of outdoor potted dahlias and often suffers from waterlogging. The amount of watering water can affect the height of the plant, which should be properly controlled in the early stage of growth. Spray water on the leaves once or twice a day in summer, while spraying water on the ground to maintain 60% air humidity.

The pot technology of dahlias is introduced here. Placing a pot of dahlias at home can not only please the mood, but also be used as medicinal materials. Get to know the habits of dahlias, cultivate them carefully at home in your spare time, and when they compete with each other, a small sense of achievement will also pour into your mind.

Potted dahlia Dahlia pinnata, also known as Dahlia, is the transliteration of Mexican Compositae herb "Dahlia", because its underground root is like sweet potato, also known as sweet potato flower. The flowers are huge, and the flower colors are red, orange, yellow, purple, white, pink, complex color, etc., the flowering period from May to October, the plant height also changes greatly. Because of its rich colors, bright colors and beautiful flowers, it is deeply loved by people and widely cultivated all over the world.

How to plant dahlias on balconies, windowsills and rooftop gardens? First, it is appropriate to select dwarf varieties, do not plant tall varieties Dali plant height of 30 cm to 200 cm, there are high, medium and low three grades, balcony pot should choose 30 cm to 60 cm dwarf varieties, too high to block the light, and easy to lodge in case of strong wind, or even fall down in the basin, injury and smashing accidents may occur. Second, the basin should be deep, large and permeable, avoid using shallow, small and light pot dahlias fleshy root is more developed, it is appropriate to use clay pots or purple sand basins with good permeability and a basin diameter of 30 cm to 50 cm, the permeability of plastic basins is poor and lighter, there is a danger of being blown off the balcony in case of strong wind, such as plastic bowls, rope should be attached to the railing to prevent accidents. Third, neutral sandy loam should be used, and heavy clay dahlias should be avoided to grow best in sandy loam. 50% rotten leaf soil, 35% vegetable garden soil, 10% sand and 5% plant ash can be mixed into loose and fertile neutral sandy loam. Turn the basin and change the new soil in early spring every year, otherwise it is easy to degenerate and the flowers are less and light. The roots of heavy clay are easy to rot and grow poorly. Fourth, the soil should be moist, avoid drought, and avoid waterlogging. it likes the humid environment, the leaves are easy to shrink and turn yellow when drought, watering should be moderate, the soil is slightly moist, too wet is easy to grow, and waterlogging is easy to rot roots, so it is appropriate to put broken hard plastic foam blocks at the bottom of the basin when planting to enhance air permeability and drainage to prevent rotting roots. At the same time of proper water control, we should often spray water to the leaf surface to increase air humidity and facilitate its growth. Fifth, it is appropriate to apply thin fertilizer frequently, avoid heavy fertilizer and single application of nitrogen fertilizer it likes fertilizer, you can add some bone powder to the soil during the growing period, apply thin fertilizer frequently for 7 to 10 days, preferably with potassium dihydrogen phosphate solution with a concentration of 0.1% at seedling stage and 0.2% at flowering stage, or use 5% calcium superphosphate. Raw and thick fertilizer is easy to burn roots, nitrogen fertilizer alone is easy to grow, and the stem is soft and lodging. Sixth, it is appropriate to place sufficient sunshine, avoid shading dahlias are positive flowers, see at least 4 or 5 hours of direct light every day in order to grow leaves and flowers, in order to be placed in the roof garden, south, west balcony is better, about 10 days on the balcony should be rotated 180 °, anti-deviation crown. Avoid indoor and shady places without the sun. 7. Keep warm and cool, avoid high temperature, muggy heat and frost. Dahlia can adapt from 10 ℃ to 32 ℃, and 15 ℃ to 25 ℃ is the most suitable. The growth of dahlia is stagnant above 32 ℃, and it can be placed on the cool east and north balcony. In the hot and rainy summer, dahlias placed in the roof garden should be shaded and protected from rain and rotting roots. Dahlia is not resistant to cold, its underground stem will wither after frost, and the underground root will be dormant. The south of the Yangtze River can overwinter outdoors, and the north of the Yangtze River should be moved to the low temperature of 1 ℃ to 10 ℃ to overwinter. Eighth, it should be well ventilated, avoid strong wind, it likes the cool environment with good ventilation, poor ventilation, weak stem, brittle because of hollow stem in case of strong wind, easy to lodge and break. Generally grow to 30 cm, with 4 such as pinkie thick bamboo pole or chopsticks thick steel bar, inserted around the basin, unearthed about 50 cm, with plastic aluminum, copper wire to do 2 or 3 circles, connect the four small columns to prevent plant lodging.