Primula, also known as the four seasons of Primula, Lunar New Year's Eve, and Crane Helian, are perennial herbs of the Primulaceae and are often cultivated for one or two years.
Primrose is an important winter and spring potted flower in China, and it is also a popular flower that people love very much. Because the flowering period is on the eve of the Spring Festival, it is known as the spring messenger.
Primroses are native to southwest China and are widely cultivated everywhere. Sexual warm and humid, not high temperature, avoid exposure to the sun. It requires the cultivation of loose, humus-rich neutral or slightly acidic soils. The culture soil can be mixed with rot leaf soil, pastoral soil, river sand, and manure fertilizer. The seedling colonization should not be too shallow or too deep. Every day, we must keep the basin soil moist, and we should properly control the humidity during flowering. During the growth period, 1 thin liquid fertilizer is applied once a week, and 1 full-element compound fertilizer is also applied 2 to 3 weeks. Hot summer must be shaded 40% to 50% to prevent direct light. The flowering season and the summer must create a cool and ventilated environment. When the flowers are thanked, they should be cut off in time to encourage the plants to continuously pull out the flowers and continue to flower.
The propagation of primroses is mainly seeding. Seeds are mostly ripe from May to June and harvested in time. Due to the short life span of seeds, it is easy to lose their vitality and should be followed by harvesting. It can also be stored in dry, low-temperature conditions after the seeds are harvested. The suitable sowing time for family cultivation is 6 to 8 months. It is not easy to grow seedlings too early and late for late flowering. At the time of sowing, the screened fine sand or fine soil is first put into a flower pot or a wooden box, and the soil is leveled and the soil is infiltrated by the dipping method. Due to the small size of the seeds, 10 times more fine sand or soil may be used for mixing and reseeding. With a slightly pressured wood board, do not need to cover the soil, you can cover a thin layer of sand to cover the seeds for the degree. After planting with pots, cover glass or plastic film to maintain humidity. Place shade or semi-shade place, suitable temperature is 15 °C ~ 20 °C, 7 ~ 10 days emergence. When the seedlings reach more than 60%, the cover should be removed and the light gradually increased to prevent shoots from growing. When the seedlings grow to 3 to 4 leaves, they can be planted. A small amount of family cultivation can be used to reproduce the ramets. Branch time or late spring and early summer, or late summer and early autumn.
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