Catharanthus roseus originated from the tropical region of Asia. It is warm and cold resistant. It should not be wet or waterlogged. It can be cultivated in general soil, but it is not suitable in saline alkali soil. It is better in sandy soil with good drainage and air permeability.
When potting Catharanthus roseus, loose soil rich in humus should be used. When seedlings grow 6-7 leaves, they should be potted. When the height of the seedling is 7-8 cm, it can be plucked once and then twice to promote multiple branches and flowers. At ordinary times, Changchun flower should not be watered too much, too wet to affect growth and development. The long-term application of some nitrogen fertilizer in Changchun peanut can increase the application of some phosphorus fertilizer in the bud stage. Cut away the remnant flowers after the flowers.
Changchun flower should not be wet and afraid of waterlogging, basin soil should not be watered too much, too wet affect growth and development. In particular, indoor winter plants should be strictly controlled watering, to dry as good, otherwise extremely vulnerable to freezing. Open cultivation, summer showers, pay attention to timely drainage, so as to avoid the whole death caused by waterlogging.
Catharanthus roseus is propagated by sowing.
In early spring sowing, the seedlings grow slowly in early stage. When the young seedlings grow to 3-4 true leaves, they start to be transplanted separately, and when there are 6-8 true leaves, they can be planted.
In the flower bed planted in May, water once every 3-5 days, and apply P and K fertilizer properly, the flowers will be leafy. Cuttage Propagation: the shoots on the old overwintering plants can be cut 8 cm long in spring, with some leaves attached. They can be planted in the humid sandy loam, with the rooting temperature of 20 ℃ - 25 ℃. Pay attention to shade and keep humidity.
When the height of the seedling is 10cm, it is necessary to knock the top to promote the growth of the tree, and then turn it into a three inch basin and gradually turn it into a seven inch basin. The mature fruit of Catharanthus roseus can split and scatter seeds by itself. When the fruit turns yellow, it should be picked in time, otherwise it is difficult to pick seeds. It can be planted three times a year, with an annual output of more than 1300 kg of hay per mu.
In the growing season, topdressing is applied every 30 days or so. Pay attention to watering at any time, but do not accumulate water. Pay attention to drainage in rainy season.
In order to promote branching, 2-3 times of coring should be carried out from colonization to the middle of August, so that flowers and leaves can flourish.
The overwintering temperature is 10-12 ℃. When the air temperature rises to about 10 C, the seeds of Catharanthus roseus will be planted. When the seedlings grow 4-5 pairs of true leaves, they will be transplanted once. In spring, the tender branches of the old plants that have lived through winter can also be taken for cutting.
In the management of Changchun flower, we should pay attention to the sufficient light for the plant. If we are in the shade for a long time, the leaves will turn yellow if the light is insufficient.
If the soil is slightly alkaline, poor ventilation and poor water seepage, it will also cause poor plant growth, yellow leaves and no flowering.
In winter, move into the room, keep the room temperature above 5 degrees, and control the watering. It is better to dry the basin soil.
If the family room temperature is kept at about 15-20 ℃, sustainable flowering will continue. Changchun flowers can be moved to outdoor management after spring. Changchun flowers are generally cultivated in pots every two years.
The ripening period of Changchun flower and fruit is from September to October, and the fruits have been ripening successively, so they must be collected in time. The propagation of Catharanthus roseus is multi-purpose sowing.
Sowing is generally carried out in early April and can be done in open field or pot. In addition, we can also take the tender branches from the old plants in spring for cutting propagation, after the survival of Changchun flower, we can top it to promote multi branching.
