Catharanthus roseus blossoms in several months

Catharanthus roseus, also known as calendula, 04:00 spring, Rixin, Yantouhong, thirty thousand flowers, and so on, its flowers are very beautiful. So, when does Catharanthus roseus blossom? What are its reproductive techniques?

In which month does Catharanthus roseus bloom?

As long as properly maintained, Catharanthus roseus can bloom all the year round, and its flowers are rich in color, such as red, purple, pink, white, yellow and so on.

What are the breeding techniques of Catharanthus roseus?

1. Sowing and reproduction

① seed collection time: the ripening period of Catharanthus roseus fruit varies with the flowering time, so the seeds should be picked along with ripening. After the fruit is ripe and the color turns black, the skin is easy to crack and lose the seeds, so it is necessary to collect seeds in time. When you see the pericarp yellowing and can vaguely reflect the black seeds inside, it should be harvested.

② sowing time: the suitable temperature for seed germination is 20: 25 ℃, usually sowing and propagating from March to May, and more annual cultivation. In order to bloom early, the seedlings can be sowed and raised in the greenhouse in early spring. Under the environment of 20 ℃, the warm spring can be moved to the open field for cultivation.

③ seedbed preparation: the nursery bed should choose a place with high and cool terrain, south to the sun and good drainage. The matrix is best prepared with peat + perlite according to 3 ∶ 1, or rotten leaf soil, poured thoroughly with 500 to 600 times carbendazim solution, slightly dried, loosened and leveled the land to make a 1.2m wide border surface.

④ sowing technique: sowing seeds by sowing method, about 1000 seeds per square meter. Cover the seeds with fine sand after sowing, do not make the seeds see the light directly, pour enough water with a fine spray pot, cover with a thin film or grass curtain to keep the soil moist, and the seedlings can emerge in 7 days and 10 days. Remove the film or grass curtain after emergence and gradually increase the light. The growth was slow in the seedling period and faster when the temperature increased. It takes time to grow. In order to prevent Catharanthus roseus quenching disease, 800 times chlorothalonil or methyl topiramate should be sprayed once a week for 2 to 3 weeks.

2. Cuttage seedling

The cuttings are mostly carried out from April to July, and the mature shoots without diseases and insect pests should be selected as cuttings. Generally, the shoots with a length of 10 cm to 12 cm at the top of the plant should be selected, and the length of cuttings should be 5 cm to 7 cm. The cutting medium was a mixture of plain sand, vermiculite and peat, wrapped in a small mass of mud at the base of the cuttings, and cut in a cold bed at room temperature of 20 ~ 24 ℃. After about 20 days, the cuttings could be transplanted to the pot after rooting and survival. Because the growth of cutting seedlings is not as good as that of sowing seedlings, it is rarely used in cultivation.

The seeds of Catharanthus roseus are between 700 and 750 per gram. Catharanthus roseus is a perennial herb, which can blossom all the year round under suitable conditions. However, in the Yangtze River basin, because the climate is too cold, it is often cultivated in one year, and the sowing time is mainly from January to April. Sowing should use loose artificial media, bed sowing, box sowing seedlings, when conditions can be used to raise seedlings. The pH value of the medium is 5.8 ~ 6.2 and the EC value is 0.5 ~ 0.75. After disinfection, the temperature of the medium is about 22 ~ 25 ℃ after sowing.

Catharanthus roseus not only has high ornamental value, but also can be used as medicine, such as analgesia, anti-inflammation, sleeping, laxative and diuresis.