The latest culture methods of Catharanthus roseus

Periwinkle is also known as Ririchun, Riricao, Ririxin, Sanwanhua, Sishichun, Clock Flower, Yanlai Red, etc. It is a subshrub plant of Periwinkle of Apocynaceae family. It has high ornamental value, but the whole plant has toxicity to be carefully considered. After eating it by mistake, it will cause leukopenia, thrombocytopenia, muscle weakness, quadriplegia and other symptoms. Let's take a look at the cultivation methods and precautions of periwinkle together!

Growth Habits of Catharanthus roseus

Catharanthus roseus is native to Mediterranean coast, India and tropical America. It has a short cultivation history in China. It is mainly cultivated in the south of Yangtze River. It is widely cultivated in Guangdong, Guangxi, Yunnan and other provinces (autonomous regions). It is used for potted plants and planting grooves for viewing. Sexual high temperature, high humidity, semi-shade resistance, not cold resistance, the most suitable temperature is 20~33℃, like sunshine, avoid wet fear of waterlogging, general soil can be cultivated, but saline-alkali soil is not suitable, with good drainage, ventilation and permeability of sandy or humus-rich soil as well, flowering, fruit almost throughout the year.

Cuttage propagation of Catharanthus roseus

Changchun flower cuttings are mostly carried out from April to July. When cutting propagation, strong young shoots without diseases and insect pests should be selected as cuttings. Generally, the shoots with the top length of 10~12 cm should be selected, and the length of cuttings should be 5~7 cm. The cutting medium is a mixture medium of sand, vermiculite and peat, a small mud ball is wrapped at the base of the cutting, the cutting is placed in a cold bed, the room temperature is 20 - 24 DEG C, the cutting takes root for about 20 days, and the cutting can be transplanted into a pot after rooting and survival. Because the growth of cuttings is not as good as that of seedlings, it is rarely used in cultivation.

SEEDLING AND SEEDLINGS OF PERSELLA ROSELLA

1. Seed collection time: Periwinkle fruits are not consistent due to different flowering time, so seeds should be collected with maturity. Fruit maturity, color to black after the skin easy to crack so that seed loss, it is necessary to timely seed collection. When you see yellow peel, and can faintly reflect the black seeds inside, it is necessary to harvest.

2. Sowing time: The suitable temperature for seed germination of Catharanthus roseus is 20~25℃, usually sown and propagated in March ~ May, and cultivated annually. For early flowering, can be in early spring greenhouse seeding seedlings, to 20℃ environment, warm spring to open field cultivation.

3, seedbed preparation: periwinkle seedbed to choose a high and cool terrain, south-facing sun, good drainage place, the substrate is best with peat + pearlite by 3:1 preparation, can also be used with rotten leaf soil, with 500~600 times of carbendazim solution irrigation, slightly dry after loosening and leveling the land, made of 1.2 meters wide bed surface.

4, sowing technology: periwinkle broadcast about 1000 grains/square meter, after sowing to cover with thin sand, do not let the seeds directly see the light, with a fine spray pot watering enough water, covered with film or grass curtain to keep the soil moist, 7~10 days can emerge. After emergence, remove the film or straw curtain and gradually strengthen the light. Seedlings grow slowly during the period, and grow faster after the temperature rises. It is necessary to thin seedlings in time. To prevent the catapult of Catharanthus roseus, 800 times chlorothalonil or thiophanate-methyl should be sprayed once a week for 2~3 weeks.

Culture method of periwinkle

1, soil: periwinkle should be fertile and well-drained soil, barren soil resistance, but avoid alkaline. Hardened, poorly aerated, clayey soil resulting in poor plant growth, yellow leaves, and no flowering.

2. Sunshine: Periwinkle is a light-loving plant. It must have sufficient sunshine during its growth period. Its leaves are green and shiny, and its colors are bright. If long-term growth in the shade, leaves yellow deciduous.

3. Temperature: Periwinkle likes warm, slightly dry and sunny environment. The suitable temperature for growth is 18~24℃ from March to July, 13~18℃ from September to March of the next year, and the temperature in winter is not lower than 10℃.

4, watering: periwinkle avoid wet fear of waterlogging, pot soil watering should not be too much, too wet affect growth and development. In particular, indoor winter plants should be strictly controlled watering, dry as well, otherwise extremely susceptible to freezing. Open field cultivation, summer showers, pay attention to timely drainage, to avoid waterlogging caused by the death of the whole piece.

5, fertilization: Periwinkle fertilization every ten days can take a compound fertilizer and liquid fertilizer alternate application method. Changchun pot soil bottom should also try to spread a layer of base fertilizer, in order to ensure the nutrient content of pot soil.

6, pest: periwinkle plants themselves are poisonous, so more resistant to pests and diseases. Seedling diseases mainly include seedling damping-off disease, gray mold, etc., in addition to preventing seedling fertilizer damage, phytotoxicity. If it happens, it should be immediately watered with clean water, and ventilation should be strengthened to reduce the harm.

7, pruning: periwinkle is a herb, more suitable for potted plants, but pay attention not to let the plant grow too high, affecting indoor decoration and viewing, so after surviving in the upper pot, after several times to pick the heart, in order to promote multiple branches, more flowers, flowers must be cut off.