1. Flower cultivation knowledge "Hydrangea"
The soil is loose, fertile and well-drained sandy loam.
However, the flower color is affected by the pH of the soil. Flowers in acidic soil are blue and flowers in alkaline soil are red. To deepen the blue color, apply aluminum sulfate during bud formation.
To maintain the pink color, apply lime to the soil. The soil in the pot should be kept moist, but watering should not be excessive. Pay attention to drainage especially during the rainy season to prevent root rot caused by waterlogging.
The suitable growth temperature for indoor potted hydrangeas in winter is 18~28℃, and the temperature in winter should not be lower than 5℃. The differentiation of flower buds takes 6 to 8 weeks at 5 to 7°C. The temperature of 20°C can promote flowering. After flowering, maintaining 16°C can extend the flowering period.
But high temperature makes the flowers fade quickly. Hydrangea is a short-day plant. It takes more than 10 hours of darkness every day to form flower buds in about 45 to 50 days.
Potted hydrangeas are commonly grown in 15 to 20 cm pots. Pay attention to adequate watering of potted plants after they sprout in spring to ensure that the leaves do not wither.
During the flowering period from June to July, there should be sufficient fertilizer and water, and fertilizer should be applied every half month. During normal cultivation, avoid the scorching sun, and 60% to 70% shade is ideal.
Proper shading can extend the flowering period when the light is too strong in midsummer. Remove the flower stems after flowering to encourage the production of new branches.
For good. If it is too wet, the leaves will rot easily.
Repot once a year in spring. Prune appropriately to maintain a beautiful plant shape.
2. Common knowledge about daily life: Can hydrangea be kept indoors
According to the inquiry on poisonous plants, we learned that hydrangeas, also called hydrangeas, are toxic and can be eaten by accident. The stems and leaves of hydrangeas can cause colic, abdominal pain, diarrhea, vomiting, shortness of breath, and bloody stools.
In everyone’s imagination, hydrangeas are edible just like marshmallows and buns, but in fact, once you eat hydrangea, you will have abdominal pain a few hours later, and other typical symptoms of poisoning Symptoms also include skin pain, vomiting, weakness and sweating, with reports of patients even experiencing coma, convulsions and a collapse of blood circulation in the body. Fortunately, an antidote for hydrangea poisoning has now been developed.
Do you understand "Are hydrangeas poisonous?" In fact, many flowers in our lives are toxic. There is no need to say that they cannot be grown because they are poisonous. Experts believe that the proper attitude towards poisonous plants is: keep an appropriate distance and do not play with and touch them at will; do not hold branches, leaves and fruits in your mouth , and don’t eat it by mistake. In addition, it should be noted that hydrangeas are prone to allergies and are generally not recommended to be placed in the bedroom.
It is recommended that flower lovers should choose flowers that they like and are harmless when planting flowers. They should not plant too many flowers indoors and pay attention to maintaining air circulation. I hope to discuss the knowledge of flower cultivation with everyone.
3. What should you pay attention to when growing hydrangeas?
The first point is the growth environment.
Hydrangea is a plant that likes a warm, humid, semi-shady environment. It is afraid of both drought and excess water. Therefore, during normal breeding, everyone should pay attention to its growing environment, and be careful not to expose it to too much sunlight, so as to avoid excessive loss of soil moisture in the pot and causing discomfort to the hydrangeas.
The second point is soil. Soil is the necessary material basis for the growth of hydrangeas, because hydrangeas like to grow in a moist environment. When breeding, it is best to choose loose, fertile, and well-drained gauze loam, which can provide the best environment for hydrangeas. Provide the best growing space and prepare the material foundation.
The last third point is watering. Although hydrangea is a plant that likes moist soil, you should pay attention to the amount of watering and not to overwater when watering. Especially on rainy days, you should pay attention to drainage to avoid excessive water accumulation that may damage the hydrangea. The roots are ulcerated.
4. What are the precautions for cultivating hydrangeas?
(1) Hydrangeas like acidic soil and are intolerant of barren and saline-alkali soil.
It does not grow well in alkaline soil and its branches and leaves turn yellow. It is suitable for loose, fertile and acidic soil rich in humus. Its flower color can change from white to red, or from red to cyan blue, due to the influence of pH.
(2) Move indoors in early or mid-October, control watering, and keep the room temperature at about 5°C to promote dormancy. Remove the leaves before entering the house to avoid leaf rot.
Begin to move to a sunny place from mid-December, keep the temperature at 15~20℃ to promote the growth of branches and leaves, and leave the room in late April of the following year. (3) During the annual growth period, topping can generally be done twice to promote branching.
After flowering, keep 1~2 nodes of the old branches and cut them short to control the height of the plant and promote the growth of new branches. After autumn, cut off the tops of new shoots to stop the growth of branches to facilitate overwintering.
(4) The seedlings cut in March can be moved into 10 cm pots after taking root, and then planted in 16 cm pots in mid-June. The first topping was performed in June.
If topping is done in early June, flower buds will form in mid-August. Seedlings cut from May to June can be planted in 16 cm pots from July to August. In order to promote the formation of flower buds that year, the last topping must be before September, otherwise flower buds will not form that year.
5. Basic characteristics of hydrangea
Hydrangea—also called wood embroidery, hydrangea, and group flower.
Belongs to the Caprifoliaceae family, a deciduous shrub or small tree. The blooms are green in summer, then turn white, and have a pleasant fragrance.
It is called this because it is shaped like a hydrangea. Hydrangea is native to my country's Yangtze River Basin, Central China and Japan.
Europe is native to the Mediterranean. Hydrangea is a common garden flower with umbel-shaped inflorescences like snowballs gathered among oval green leaves, which is very beautiful.
Hydrangeas are not cold-tolerant, but they are highly adaptable. About the flower language of hydrangea: The birthday flower on January 1st is hydrangea. The color (white, pink, light blue) represents hope. In the cold winter, the first sight of pink buds and white flowers seems to tell people that spring is approaching. .
Therefore, the flower language of hydrangea is - hope. The color of the suit (blue) means "betrayal".
6. What are the precautions for hydrangea cultivation
1. Soil: Loose, fertile and well-drained sandy loam is preferred, not too dry, rich in humus and moist. , well-drained light loam soil.
2. Temperature and sunshine: Hydrangea is a short-day plant. It takes about 6 weeks to form flower buds when placed in the dark for more than 10 hours a day. When promoting flowering cultivation, after 6 to 8 weeks of low temperature treatment at 5°C to 7°C, the plants are placed in an environment of about 20°C, and then lowered to 16°C when flower buds are seen. It will take about two weeks. flowering.
3. Pruning and fertilizing: When the hydrangea grows too vigorously, it should be pruned or topping in time, so as to control the growth and maintain the ideal perfect appearance. And promotes more flowering of plants.
When the flowers fade, the branches should be cut short to promote the growth of new branches. When the new branches grow to 8 cm to 10 cm, they can be cut short again to make the side buds full and full, which is conducive to flowering next year.
After the new seedlings are placed in the pot, thin liquid fertilizer mainly composed of nitrogen fertilizer can be applied 1 to 2 times to promote the germination of branches and leaves. Pay attention to adequate watering of potted plants after they sprout in spring to ensure that the leaves do not wither.
During the flowering period from June to July, there should be sufficient fertilizer and water. Apply fertilizer once a month and avoid the hot sun. 4. Propagation: To propagate hydrangeas, you can choose cuttings, young branches in early summer.
The cuttings should have 2-3 nodes, remove the lower leaves, and cut off half of the upper leaves. This is to prevent water evaporation and promote survival rate. After inserting, place it in a semi-shady place to maintain humidity to facilitate rooting.
High-altitude layering propagation can also be carried out during the growing season, or propagation by division before budding in spring.
7. What should be paid attention to when cultivating hydrangeas?
What should be paid attention to when cultivating hydrangeas: 1.
Temperature and light should be moderate: If you want to grow hydrangeas well, you must pay attention to the temperature and light of the surrounding environment. Hydrangeas can only grow normally between 15℃-27℃. Therefore, in winter, try to move hydrangea indoors to a bright and sunny place, and the room temperature should not be lower than 5℃, otherwise the hydrangea will stop growing or even freeze to death.
In summer, you need to do some cooling and shading work to avoid scalding the hydrangea leaves. Excessive sunlight will cause the hydrangea leaves to change color or even wither. 2.
Water and fertilize appropriately: When watering hydrangeas, you only need to keep the soil surface moist. In summer, you can use water spraying to reduce the temperature around the leaves. In winter, water as little as possible, just half wet and half dry.
During the bud-pregnancy period, water the hydrangea more, at least twice a day, and apply a thin fertilizer to the hydrangea every ten days. Do not apply any more fertilizer during the dormant period. 3.
Weeding and pruning must be timely: the growing environment of hydrangeas must be kept sanitary at all times, and surrounding weeds must be removed as soon as they appear. Generally speaking, in order to make the hydrangea plant more beautiful, it is necessary to pinch when there are too many new leaves, and also pay attention to pruning some leggy branches and excessively dense branches.
In addition, diseased branches and leaves after the flowers bloom should be pruned in time to avoid competing with the main branches for nutrients.
8. What should be paid attention to when cultivating hydrangeas?
Things to note when cultivating hydrangeas are as follows: (1) Hydrangeas like acidic soil and are intolerant of barren and saline-alkali soil.
It does not grow well in alkaline soil and its branches and leaves turn yellow. It is suitable for loose, fertile and acidic soil rich in humus. Its flower color can change from white to red, or from red to cyan blue, due to the influence of pH.
(2) Move indoors in early or mid-October, control watering, and keep the room temperature at about 5°C to promote dormancy. Remove the leaves before entering the house to avoid leaf rot.
Begin to move to a sunny place from mid-December, keep the temperature at 15-20°C to promote the growth of branches and leaves, and leave the room in late April of the following year. (3) During the annual growth period, topping can generally be done twice to promote branching.
After flowering, keep the old branches and cut them short by 1-2 nodes to control the height of the plant and promote the growth of new branches. After autumn, cut off the tops of new shoots to stop the growth of branches to facilitate overwintering.
(4) The seedlings cut in March can be moved into 10 cm pots after taking root, and then planted in 16 cm pots in mid-June. The first topping was performed in June.
If topping is done in early June, flower buds will form in mid-August.
Seedlings cut from May to June can be planted in 16 cm pots from July to August. In order to promote the formation of flower buds that year, the last topping must be before September, otherwise flower buds will not form that year.