How do you grow calendula?

The growth of the flower stem of calendula is straight up, the golden color is very much like a lamp, and the florescence is also very long, which is very suitable for ornamental flowers. So how do you grow calendula?

First, sowing and reproduction

1. Sowing: autumn sowing is often carried out after mid-late September: Matrix disinfection to disinfect the substrate used for sowing, the best way is to put it into the pan to fry hot, any diseases and insects can be scalded to death.

two。 Sprouting: soak the seeds in warm hot water (the temperature is about the same as facial wash) for 3 to 10 hours until the seeds absorb water and expand. For common seeds that germinate easily, this work does not have to be done.

3. Sowing: for small seeds that are difficult to pick up with hands or other tools, wet one end of the toothpick with water, stick the seeds one by one on the surface of the matrix, cover the matrix 1 cm thick, and then put the seeding flowerpot into the water, the depth of the water is 1 inch 2 inch 2 shock 3, let the water slowly soak up (this method is called "pot immersion method").

4. Management: after sowing in autumn, when you encounter a cold wave and low temperature, you can wrap the flowerpot with plastic film to keep warm and wet; after the seedlings are unearthed, the film should be opened in time, and before 9:30 every morning, or let the seedlings receive the sun after 3:30 in the afternoon, otherwise the seedlings will grow very weakly. After most of the seeds come out, they need to plant seedlings properly: pull out the diseased and unhealthy seedlings, so that the seedlings left behind have a certain space between each other; when most of the seedlings grow 3 or more leaves, they can be transplanted into the pot.

2. Cutting propagation

1. Cutting substrate: is used for cutting nutrient soil or river sand, peat soil and other materials. Due to the limited conditions, it is difficult to get an ideal cutting substrate, so it is recommended to use the prepared and sterilized cutting substrate provided by this station; medium and coarse river sand is also fine, but rinse with clean water several times before use. Do not use sea sand and river sand in saline-alkali areas, they are not suitable for the growth of flowers and plants.

two。 Selection of cutting branches: the branches used for cutting are called cuttings. Usually combined with the heart-picking work, the sturdy, disease-free top tip is taken as a cuttage, and the top tip is cut directly.

3. Temperature: the optimum temperature for rooting of cuttings was 18 ℃ ~ 25 ℃, which was lower than 18 ℃, and it was difficult and slow for cuttings to take root, and when the temperature was higher than 25 ℃, the cuttings were easily infected and rotted by bacteria, and the higher the temperature was, the greater the proportion of rotting was. When there is a low temperature after cutting, the heat preservation measure is mainly to wrap the flowerpot or container used for cutting with thin film; when the temperature is too high after cutting, the cooling measure is mainly to shade the cuttings, to cover 50-80% of the sun, and at the same time, spray the cuttings 3-5 times a day, with more times of spraying when the temperature is higher in sunny days, lower temperatures and higher temperatures in rainy days, but less or no spraying times.

4. Humidity: the relative humidity of the air must be kept at 750.85% after cutting. You can increase the humidity by spraying the cuttings 1-3 times a day, the higher the temperature in sunny days, the more times you spray, and the lower the temperature in cloudy and rainy days, the less or no spraying. But with excessive spraying, cuttings are easy to be infected by bacteria and rot, because many kinds of bacteria exist in the water.

5. Light: cutting propagation is inseparable from sunlight, but the stronger the light is, the higher the temperature in the cuttings is, the more exuberant the transpiration of cuttings is, and the more water is consumed, which is not conducive to the survival of cuttings. Therefore, after cutting, the sun must be shaded by 50% to 80%, and then gradually removed after the root system grows: remove the sunscreen at 4:00 every sunny day, and cover it before 9:00 the next day.

The cultivation of calendula is relatively simple, and the conditions for growth and reproduction are not harsh, so it is very suitable for public planting.