How to plant Catharanthus roseus seeds?

Catharanthus roseus, also known as Calendula, 04:00 Spring, Rixin, Yantouhong, 30,000 Flowers, and so on, are sub-shrubs of the genus Catharanthus roseus of the oleander family. Many varieties have been bred in Taiwan, and the larger the trend of flower breeding, they are often used for potted plants and planting troughs to watch. Whole herbs can relieve pain, anti-inflammation, sleep, laxation and diuresis. Let's take a look at how to plant Catharanthus roseus seeds.

Seed collection time

The ripening period of Catharanthus roseus fruit is different due to different 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.

Sowing time

The suitable temperature for seed germination of Catharanthus roseus is 20-25 ℃. It is usually sown and propagated from March to May, and it is cultivated for more than one year. 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.

Seedbed preparation

Catharanthus roseus seedling bed should choose a place with high and cool terrain, sunny to the south and good drainage, and the matrix should be prepared with peat + perlite according to 3 ∶ 1, or rotten leaf soil, poured through with 500-600 times carbendazim solution, slightly dried and loosened and leveled to make a border surface 1.2m wide.

Sowing technology

Catharanthus roseus is sown with about 1000 seeds per square meter. after sowing, it should be covered with fine sand, so as not to make the seeds see the light directly. Pour enough water with a fine spray pot and cover with a film or grass curtain to keep the soil moist. Seedlings can emerge in 7 days and 10 days. Remove the film or grass curtain after emergence and gradually increase the light. The seedlings grow slowly in the seedling period, but grow faster when the temperature rises, and the seedlings should be planted in time. 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.