The hydrangea plant, also called the cup of water or hydrangea, is a flowering potted plant. Hydrangea plants are characterized by the beauty of their flowers, and they follow the family Fam. Saxifragaceae.
The flowers of the hydrangea plant are large in size, found in globular clusters, pink or blue-white in color, and It is the sepals that give the color of the flowers, not the petals, and the leaves are dark green, and hydrangea plants bloom in the spring.use of hydrangea plants.
1 – The flowers are large in size, spherical in shape, with a beautiful view.
2 – Hydrangea plants have three colors: white, blue, red or pink, and the color of the resulting flowers can be controlled except for white.
3 – Hydrangea plants are perennials.
4 – Hydrangea plants are used as flowering potted plants indoors, especially at flowering time, and the plants remain flowering indoors for a long time.Hydrangea plants propagation:
Hydrangea plants are propagated in several ways:Reproduction by mind (vegetative propagation):
The cuttings are taken from the ends of the branches (terminal cuttings), and they are approximately 5-7 cm long and have a group of leaves. It is preferable to plant the cuttings in a greenhouse and irrigate them with mist (mist) or in trays, provided that the trays are covered with newspaper paper.
The cuttings are taken during the month of April or May, and the carrot total is formed after transplanting the cuttings about 21 days. Then it is separated into pots with diameters of 13-16 cm, to be separated when the root length reaches 1 cm.Reproduction by cuttings:
The cuttings are taken from hard, woody branches devoid of leaves, about 5 cm long. Each cutting contains one node and is taken during the month of January and February. The cuttings are planted in propagation basins, and they are separated when the root is formed and about 1 cm long.
It is preferable to take the wooden cuttings from mothers’ farms, provided that they are 5 cm long and have one knotPropagation by leaf cuttings:
The cuttings are taken from the branches so that the cutting is 3 cm long below the node and 1 cm long directly above it. Then the stem is cut longitudinally into two halves, with each half containing a leaf in the bud’s armpit. The leaf cuttings are planted immediately after cutting, and one third may be separated. leaf to reduce transpirationHow to planting cuttings:
The cuttings are cultivated in an environment consisting of sand and house moss, and the soil must be sterilized before planting. This is done by dipping in the hormone solution or using the hormone in the form of a powder. These hormones include indole butyric acid, naphthalene acetic acid, or roton.
The basins should also be covered with newspaper, glass or plastic, during the first five days of transplanting cuttings to stimulate the growth of the root system of the cuttings.Hydrangea planting and propagation date:
Usually cuttings are taken during the month of January until May, but on a commercial scale, cuttings are taken during the period from April and May, and after separation, plants grow during the summer and when autumn and winter enter the plants, they enter dormancy, and then bloom during the season Spring.Factors affecting hydrangea flowers . First: the light.
The formation of buds in hydrangea plants usually does not depend on the length of the day, but it was found that the growth of flower buds is rapid and early under the conditions of the short day.
The flower buds usually arise during the month of September when the day is short, but if the plants are exposed to the conditions of the long day, an elongation occurs in the internodes, and thus we get tall plants.Second: The appropriate temperature for hydrangea plants:
The most suitable temperature For the growth of hydrangea is 16 degrees Celsius at night, and the daytime temperature is higher by 6 degrees Celsius, and because the terminal buds grow during the autumn, the plants need in this period a low temperature.
Since the temperature gradually increases above 18 degrees Celsius and drops below 13 degrees Celsius, the growth rate of the flower buds slows down, and at the beginning of November, the flower buds have been formed, and accordingly, hydrangea plants need a low degree to ripen the flower buds for a period of 6 weeks.
The most appropriate temperature is 10 degrees Celsius, and it was also found that the temperature from 4-7 is the most suitable temperature for the ripening of flower buds, so cool greenhouses are preferred for the growth of hydrangea plants during this period.Hydrangea seedlings:
After the success of the growth of the cuttings, the seedlings are separated and the following are:
* The seedlings are separated into small pots with a diameter of 8 cm, and after three weeks they are transferred to larger pots with a diameter of 14-16 cm.
* It is possible to separate in the basins directly and at a distance of 30 cm between the plants and each other.Hydrangea care: 1 – Interruption:
The plants are draped by removing the growing top in order to obtain multiple branches and to encourage the growth of lateral buds, and tweezing is done twice, the first time during the month of April and May and the second time during the month of June and early July, and that is in early cultivations, but in In the case of late plantings, the cropping is done during the end of August and September.The relationship of nutrients and flower color in hydrangea plants:
The tamping is done by removing the growing top while leaving two pairs of leaves on the branch. After tamping, 5-7 branches are removed from which only 2-3 branches are selected, taking into account good fertilization using NPK 20-20-20 foliar spray at a rate of 2 g per liter of water, provided that the foliar fertilization is done approximately every week.
1 – To get red, pink, or blue flowers, the aluminum element is added, taking into account that the soil is alkaline, meaning that the soil PH is from 7-8.
2- To obtain blue flowers, the soil must be acidic, meaning that the pH of the soil is between 5-6.
Blindness of hydrangea plants is the lack of flower buds, and therefore flowers do not form. The reason for this is that plants are exposed to very low temperatures at the beginning of autumn, and extreme heat during the end of summer.
Also, poor fertilization, such as an increase in phosphorous, a deficiency of nitrogen, a deficiency of potassium, or that the land is not fertile and poor, such as poor sandy soil.The problem of burning plant leaves:
The burning of the leaves of the hydrangea occurs as a result of the plants being exposed to direct sunlight for long periods with no regular irrigation. Therefore, during the long day, the plants must be covered with black cloth to control the number and intensity of lighting.
20 common types:
1. Hydrangea macrophylla
2. Hydrangea paniculata
3. Hydrangea quercifolia
4. Hydrangea serrata
5. Hydrangea arborescens
6. Hydrangea aspera
7. Hydrangea involucrata
8. Hydrangea heteromalla
9. Hydrangea angustipetala
10. Hydrangea anomala petiolaris
11. Hydrangea seemanii
12. Hydrangea villosa
13. Hydrangea integrifolia
14. Hydrangea scandens
15. Hydrangea radiata
16. Hydrangea paniculata grandiflora
17. Hydrangea paniculata Limelight
18. Hydrangea macrophylla Blue Wave
19. Hydrangea serrata Bluebird
20. Hydrangea paniculata Silver Dollar