How to Grow Potted Dwarf Dahlia? A Detailed Guide to Propagation and Cultivation Management Techniques
Dwarf dahlia is a very beautiful flowering plant with a long blooming period. If grown in pots, it has excellent ornamental value. Below is information on propagation and cultivation management techniques for potted dwarf dahlia. Those who love flowers and plants can take a look.
Propagation Techniques for Dwarf Dahlia
Propagation Methods. The propagation of dwarf dahlia has relatively high temperature requirements. To ensure effective propagation the following year, the seeds of dwarf dahlia should be scientifically stored at the end of October, kept in a warm and humid environment. Currently, two main methods are used: bulb division propagation and division propagation. First, bulb division propagation of dwarf dahlia involves planting the flower's bulbs, corms, or tubers into the soil. After these corms or tubers grow for 1 year, small bulbs will grow around them, and these small bulbs can then be dug out. Second, division propagation can be carried out in early spring. First remove the mother plant from the pot, then disinfect it, and place the dwarf dahlia in a shaded area for care.
Sowing and Seedling Raising. Sowing and seedling raising is an important task in dwarf dahlia propagation. When propagating dwarf dahlia, the propagation quantity must be well controlled, the amount of soil must be managed, and the ground temperature should also be properly controlled to ensure the seed germination temperature is around 25°C, and seedling growth should be between 22~28°C. Second, scientific seed containers should be used to ensure ventilation in the seedling room, and nitrogen, phosphorus, and potassium fertilizers should be added according to different growth conditions to ensure proper topdressing during the flowering period.
Management Strategies for Dwarf Dahlia
For flowers planted on a large scale in a region, only by managing them according to the growth characteristics of dwarf dahlia can the problems arising during its growth be solved. Dwarf dahlia likes fertilizer, so the fertilization interval can be appropriately shortened, usually applying fertilizer once every 15 days, mainly potassium dihydrogen phosphate fertilizer. At present, when fertilizing dwarf dahlia, the fertilizer amount is often not well controlled, and large-scale fertilization fails to fully consider the regional environmental conditions, resulting in the problem of too much water making the plot prone to rot.
The potting soil should be based on garden soil and fine sand, and a drainage layer should also be made at the bottom of the pot. To improve the effectiveness of potted dwarf dahlia, a drainage layer should also be added. Usually when the seedlings are 20cm tall, repotting is done 2 times, and new leaf mold can be added each time.
The degree of beauty of the dahlia also affects the dwarf dahlia's ability to resist pests and diseases. When pruning dwarf dahlia, the principle of "remove the weak and keep the strong" should be adopted, cutting off side buds and keeping the main branches. Pruning of dwarf dahlia should be carried out during the wilting season, and can be done according to the standard of leaving a height of 20cm, with water appropriately controlled during pruning.
There are powdery mildew, viral disease, and brown spot disease. First, a pest and disease control plan should be formulated, and targeted control measures should be effectively adopted to comprehensively improve the effectiveness of pest and disease control. Second, prevention should be the main approach, using methods that effectively prevent pathogens from overwintering and eliminate environments that breed pathogens. Third, according to changes in the local environment, preparations for preventing local diseases should be effectively made.
The dwarf dahlia has a beautiful flower form like a chrysanthemum and can be used for garden planting, potted cultivation, and more. It has very good ornamental value. Everyone can plant it according to the cultivation methods shared by the editor.
Dwarf Dahlia Propagation and Cultivation
Flower Name: Dwarf Dahlia
Dwarf Dahlia Aliases: Xiaoli Ju, Xiaoli Hua
Scientific Name: Dahlia pinnate cv.
English Name: Dwarf Dahlia
Family and Genus: Asteraceae, Dahlia genus
Dwarf dahlia (scientific name: Dahlia pinnate cv.), also known as Xiaoli Ju and Xiaoli Hua, belongs to the Asteraceae family and the Dahlia genus. It is a perennial bulbous herbaceous plant with a low plant height and a long blooming period. It is an excellent groundcover plant, and can also be used in flower beds, flower borders, and other places. It can also be potted for ornamental viewing or used as a cut flower.
Morphological Characteristics
The morphology of dwarf dahlia is similar to that of the large dahlia. It is a group of dwarf-type cultivars among dahlia varieties, but the plant is relatively short, with a height of only 20 to 60 cm, much branched, with capitula. Several flowers can grow on one peduncle, the flower stem is 5 to 7 cm, and the flower colors include dark red, purple-red, pink, yellow, white, and many other colors. The flower shapes are varied, and there are single-petaled and double-petaled forms. In a suitable environment, it can bloom all year round. It has the characteristics of a low plant height and a long blooming period.
Dwarf dahlia is a perennial herbaceous plant with persistent roots in the Asteraceae family, Dahlia genus. Its morphology is similar to that of the large dahlia, but the plant is relatively short, with a height of only 20 to 60 cm, much branched, with capitula. Several flowers can grow on one peduncle, the flower stem is 5 to 7 cm, and the flower colors include dark red, purple-red, pink, yellow, white, and many other colors. The flower shapes are varied, and there are single-petaled and double-petaled forms. In a suitable environment, it can bloom all year round. It has the characteristics of a low plant height, a long blooming period, and bright and rich flower colors. It is an excellent groundcover plant, and can also be used in flower beds, flower borders, and other places. It can also be potted for ornamental viewing or used as a cut flower.
Perennial herb. It is actually a group of dwarf-type cultivars among dahlia varieties. The dwarf dahlia plant is low, 20cm-60cm tall; the stems are much branched, and the flowers are numerous and small. The flower diameter is 5cm-7cm; the tubers are also relatively small. The flower shape variation is not as rich as that of the large dahlia; however, the flower colors are bright and colorful, and the blooming period is longer, with flowers blooming continuously from June until frost. Its seed-setting ability is very strong.
Growth Habits
It likes sunlight and prefers a mild climate. The suitable growth temperature is 10~25°C. It is both afraid of heat and not cold-tolerant. At 0°C, the tubers freeze. In areas with high temperatures and heavy rain in summer, plant growth stagnates and it enters a semi-dormant state. It is neither drought-tolerant nor waterlogging-tolerant, and dislikes heavy clay soil. After being waterlogged, the tubers rot. It requires loose, fertile, and well-drained sandy loam soil, and should not be planted in low-lying waterlogged areas.
Dwarf dahlia is native to Mexico. It likes a cool, dry environment with plenty of sunlight, is afraid of waterlogging, and is suitable for growing in loose, fertile, well-drained and breathable sandy soil. It should not be planted in low-lying waterlogged areas either. The suitable growth temperature is 12°C to 25°C. When the seedlings are about 15 cm tall, pinch once to promote side branches and form a full plant shape. During the growth period, apply a diluted, fully decomposed liquid fertilizer about once every 15 days. Its cold tolerance is somewhat poor. In northern regions, the tubers can be dug out of the soil at the end of October, dried for 2 to 3 days, and then stored in sand indoors, with the temperature maintained at around 5°C.
Dwarf dahlia is native to the highlands of Mexico at an altitude of 1500 meters. It likes sunlight and prefers a mild climate. The suitable growth temperature is 10-25°C. It is both afraid of heat and not cold-tolerant. At 0°C, the tubers freeze. In areas with high temperatures and heavy rain in summer, plant growth stagnates and it enters a semi-dormant state. It is neither drought-tolerant nor waterlogging-tolerant, and dislikes heavy clay soil. After being waterlogged, the tubers rot. It requires loose, fertile, and well-drained sandy loam soil.
Bulb Division Propagation
The underground parts of the flower include bulbs or corms, tubers, tuberous roots, etc. After these bulbs or corms, tubers, tuberous roots, etc. grow underground for one year, small bulbs will grow around them. These small bulbs can simply be separated and planted. The operation is simple and management is convenient. Just note that when planting, do not plant the small bulbs too deep: usually the thickness of the covering soil should not exceed one times the bulb diameter.
Division Propagation
It is best to do this in early spring (February or March) after the soil thaws. Take the mother plant out of the flower pot, shake off excess potting soil, separate the tangled root system as much as possible, and cut it open into two or more plants with a sharp knife. Each divided plant must have a considerable root system, and its leaves should be properly pruned to facilitate survival.
Before potting, soak the divided small plants in a 1500 times dilution of chlorothalonil solution for five minutes, then take them out and let them dry before potting. You can also use chlorothalonil to drench the roots immediately after potting. After dividing and potting, drench the roots or water thoroughly once. Because its root system is greatly damaged and its water absorption capacity is very weak, it takes about 3~4 weeks to recover and sprout new roots. Therefore, within 3~4 weeks after division, watering should be moderated to avoid root rot. However, the transpiration of its leaves is not affected. To maintain the water balance of the leaves, the leaf surface needs to be misted 1~3 times a day (more misting when the temperature is high, less or no misting when the temperature is low). Do not fertilize during this period either. After division, also note that sunlight may be too strong, so it can be placed in a shade shed for care.
Cutting Propagation
After the terminal buds, axillary buds, and foot buds of dwarf dahlia sprout, they can all be cut for rooting. Foot bud seedlings have vigorous growth and strong resistance to pests and diseases. Generally, in early March, plant the tubers in a plain sand pot, keep them moist, and place them at room temperature above 15°C to promote sprouting. When the foot buds grow 2 true leaves, break them off from the tuberous roots, insert them into plain sand to promote rooting, mist with water 2~3 times a day, and they can root in just over 20 days.
Cultivation Management
Transplanting
When potting small seedlings, first place a 2~2 cm thick layer of coarse-grained substrate or ceramsite at the bottom of the pot as a drainage layer, sprinkle a layer of fully decomposed organic fertilizer on top as base fertilizer, about 1~2 cm thick, then cover with a layer of substrate about 1~2 cm thick, and then place the plant in, so as to separate the fertilizer from the root system and avoid burning the roots. The substrate used for potting can be one of the following. Vegetable garden soil: cinder = 3:1; or garden soil: medium-coarse river sand: sawdust (mushroom residue) = 4:1:2; or one of paddy soil, pond mud, or leaf mold. Or peat + perlite + ceramsite = 2 parts + 2 parts + 1 part; vegetable garden soil + cinder = 3 parts + 1 part; peat + cinder + ceramsite = 2 parts + 2 parts + 1 part; sawdust + vermiculite + medium-coarse river sand = 2 parts + 2 parts + 1 part. After potting, water thoroughly once and place in a slightly shaded environment for one week. When transplanting small seedlings, first dig the planting hole, sprinkle a layer of organic fertilizer at the bottom of the planting hole as base fertilizer, about 4~6 cm thick, then cover with a layer of soil and place the seedling in, so as to separate the fertilizer from the root system and avoid burning the roots. After placing the seedling in, backfill the soil, cover the root system, and firm the soil with your feet, then water thoroughly once.
Fertilizer and Water Management
Dwarf dahlia does not have high fertilizer and water requirements, and it is also afraid of random fertilization, concentrated fertilizer, and one-sided application of nitrogen, phosphorus, and potassium fertilizers. It requires following the fertilization (and watering) principle of "apply diluted fertilizer frequently, use small amounts but many times, and provide complete nutrition":
Spring, Summer, and Autumn
Spring and autumn are its peak growth seasons. On sunny days or during high temperatures, the interval can be shorter; on rainy days or during low temperatures, the interval can be longer or no watering may be done.
Summer is a season of slow growth, so fertilizer and water should be appropriately controlled. Water in the early morning or evening when the temperature is low, and also mist the plant frequently. Try to schedule watering in the early morning when the temperature is relatively low.
Fertilizer and water management should follow the cycle of "Hua Bao"——"Hua Bao"——clear water——"Hua Bao"——"Hua Bao"——clear water (at least ensure two "Hua Bao" applications per week), with an interval of about: 1~4 days for outdoor care; 2~6 days for indoor care.
Winter
During the winter dormant period, the main task is to control fertilizer and water well. Fertilizer and water management should follow the cycle of "Hua Bao"——clear water——clear water——"Hua Bao"——clear water——clear water, with an interval of about 7~10 days. Try to schedule watering at noon on sunny days when the temperature is relatively high.
Propagation and Cultivation
Sow seeds by spot sowing or drilling in flower pots or seedbeds, lightly cover with about 0.3 cm of soil, maintain humidity and about 70% sunlight, and they will germinate after 6-8 days. Transplant when there are 5-7 true leaves. Plant spacing 20-30cm. The cultivation soil is best as fertile sandy loam, and both drainage and sunlight need to be good. Potted plants should avoid waterlogging, otherwise the bulbs are prone to rot. Water once daily in summer and once every 3-5 days in winter. Compound fertilizer can be applied during the growth period.
Dwarf dahlia has a short plant shape and rich flower colors, including various cultivars such as bright red, purple-red, ink red, yellow, blue, purple, white, and mixed colors. The blooming period is relatively long, usually 4-5 months, and it is suitable for home potted ornamental viewing. From sowing to flowering takes about 60 days. By sowing in stages, as long as the temperature is suitable, there are flowers to enjoy all year round.
In northern regions, sow indoors in a warm place in early February, and flowers can be seen by "May Day". Sow outdoors in early July, and flowers will bloom abundantly around National Day. Dwarf dahlia and dahlia belong to the same genus of flowers. Its traits are similar to dahlia, except that the plant is shorter, about 20 cm to 40 cm tall, with many branches and many flower heads, mostly single-petaled small and medium-sized flowers. Each plant can bear several flowers and they open at the same time. Dwarf dahlia likes a cool and mild climate and likes sunlight.
Propagation: Mostly by sowing, but it is best to use seeds produced by artificial controlled pollination. Division and cutting propagation can also be used. Because dwarf dahlia is naturally pollinated, the seeds are prone to variation. To maintain the excellent characteristics of the seeds, artificial pollination is best.
In the north, sowing is generally done in early May. Sow seeds by spot sowing or drilling in flower pots or seedbeds, lightly cover with about 0.3 cm of soil. The suitable germination temperature is 15-20°C. Maintain humidity and about 70% sunlight. They will germinate after 6-8 days. After two leaves appear, plant out. The suitable growth temperature is 18-25°C. Transplant when there are 5-7 true leaves. When transplanting seedlings, bring the original soil ball to avoid damaging the tuberous roots and facilitate survival. Plant spacing 20-30cm.
Management: Dwarf dahlia likes a cool and mild climate and likes sunlight. It dislikes heavy clay soil and prefers loose, fertile sandy loam. It has strong adaptability and can also grow well under high summer temperatures. The cultivation soil is best as fertile sandy loam, and both drainage and sunlight need to be good. Potted plants should avoid waterlogging, otherwise the bulbs are prone to rot. During the growth period, water and fertilize reasonably, and at the same time provide sufficient light so that it grows robustly with abundant flowers and lush leaves. Water once daily in summer and once every 3-5 days in winter. Compound fertilizer can be applied during the growth period.
Adjusting the Blooming Period: The blooming period varies by region, and it can generally bloom continuously for 4 to 5 months. It is relatively heat-tolerant and not very sensitive to day length. It is native to the Americas, likes a cool and mild climate, likes sunlight, dislikes heavy clay soil, and is suitable for cultivation in loose, fertile sandy loam. It has strong adaptability and can also grow well under high summer temperatures. In northern regions, sow from April to May, and transplant and plant out after 2 true leaves appear. From sowing to flowering takes about 2.5 months. To adjust the blooming period, sow in stages, so that as long as the temperature is suitable, it can bloom continuously all year round. For example, sow in a greenhouse in early February, and it can bloom around "May Day". Sow outdoors in early July, and it can bloom around National Day. If sowing in October, it can be sown in pots or outdoors. When the temperature drops to around 15°C, move it into a greenhouse, or build a double-layer plastic insulation shed, maintain a suitable growth temperature of about 10°C to 25°C, artificially provide 6 to 10 hours of light, and maintain a day-night temperature difference of above 5°C. Note that a quick-acting liquid fertilizer with balanced nitrogen, phosphorus, and potassium should be applied as topdressing. Remember that nitrogen fertilizer must not be excessive, otherwise it will cause the plant to lodge. If you want to dwarf it, you can control its height by pinching and removing the growing tips, or when its height grows to about 15 cm, spray the leaves with 0.05% to 0.1% chlormequat 1 to 2 times.
Disease Control
Powdery mildew harms leaves, pedicels, and flower buds. At first, nearly circular white powdery spots appear, which expand into mottled white powdery patches. The leaves become distorted and withered. The pathogen overwinters in diseased residues and spreads through airflow. The disease is severe from September to October. In the early stage of the disease, 2% antimycin 120 aqueous solution at 100~200 times dilution or 40% sulfur carbendazim suspension at 800 times dilution can be used, spraying once every 10 days, for 2~3 consecutive sprays.
Brown spot disease: After the leaves are infected, small light yellow spots first appear, then expand and sink, and finally form nearly circular lesions with a gray-white center and dark brown edges, with concentric rings, 1~5 mm in diameter, and a light black mold-like substance is produced on the surface. The pathogen overwinters in diseased leaf residues. The disease is severe from June to August. It can be controlled with 1% Bordeaux mixture or 75% chlorothalonil at 600 times dilution.
Viral disease shows symptoms such as mosaic, chlorosis, and dwarfing. The viral agents are dwarf dahlia mosaic virus, cucumber mosaic virus, tomato spotted wilt virus, tobacco streak virus, etc. Leafhoppers and aphids transmit the virus. For control, virus-free propagation materials can be selected and virus-transmitting insects should be controlled.
Dwarf dahlia stem borer moth larvae are light yellow or light red, with 2~3 generations per year. The larval damage period is from June to August. 50% fenitrothion at 1000 times dilution can be sprayed. If the insect bores into the stem, omethoate at 100~200 times dilution can be injected.
Ornamental Value
The flower colors are brilliant and dazzling, with countless forms. The blooming period is also long, and it is one of the world's famous flowers. The plant type is short, the flower colors are colorful, and the peak blooming period coincides with National Day, making it most suitable for home potting.
Dwarf Dahlia Planting and Cultivation
Dwarf dahlia likes a cool and mild climate and likes sunlight. It dislikes heavy clay soil and prefers loose, fertile sandy loam. It has strong adaptability and can also grow well under high summer temperatures. The cultivation soil is best as fertile sandy loam, and both drainage and sunlight need to be good. Potted plants should avoid waterlogging, otherwise the bulbs are prone to rot. During the growth period, water and fertilize reasonably, and at the same time provide sufficient light so that it grows robustly with abundant flowers and lush leaves. Water once daily in summer and once every 3-5 days in winter. Compound fertilizer can be applied during the growth period.
Adjusting the Blooming Period: The blooming period varies by region, and it can generally bloom continuously for 4 to 5 months. It is relatively heat-tolerant and not very sensitive to day length. It is native to the Americas, likes a cool and mild climate, likes sunlight, dislikes heavy clay soil, and is suitable for cultivation in loose, fertile sandy loam. It has strong adaptability and can also grow well under high summer temperatures. In northern regions, sow from April to May, and transplant and plant out after 2 true leaves appear. From sowing to flowering takes about 2.5 months. To adjust the blooming period, sow in stages, so that as long as the temperature is suitable, it can bloom continuously all year round. For example, sow in a greenhouse in early February, and it can bloom around "May Day". Sow outdoors in early July, and it can bloom around National Day. If sowing in October, it can be sown in pots or outdoors. When the temperature drops to around 15°C, move it into a greenhouse, or build a double-layer plastic insulation shed, maintain a suitable growth temperature of about 10°C to 25°C, artificially provide 6 to 10 hours of light, and maintain a day-night temperature difference of above 5°C. Note that a quick-acting liquid fertilizer with balanced nitrogen, phosphorus, and potassium should be applied as topdressing. Remember that nitrogen fertilizer must not be excessive, otherwise it will cause the plant to lodge. If you want to dwarf it, you can control its height by pinching and removing the growing tips, or when its height grows to about 15 cm, spray the leaves with 0.05% to 0.1% chlormequat 1 to 2 times.