Exactly how much sun does cabbage need? Almost all crops need light, temperature, and moisture in their growth.
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Light not only provides temperature, but also has an important impact on photosynthesis, while the temperature can affect the germination of seeds, seedling survival, but also affect the activities of surrounding bacteria, viruses, and pests, not to mention moisture, lack of water cabbage do not want to grow.
Cabbage is a crop that has a special preference for light, and if there is sufficient sunlight exposure, it has a great impact on its growth.
In the nutritional stage, light can greatly promote the growth of the crop, and the average light should not be less than 8 hours during this time period.
After the emergence of lotus-shaped leaves, it should be kept at 9 hours to ensure its growth.
Once it falls below 8 hours, it will enter a state of stopping growth, and if it doesn’t grow, the final yield, not to mention the quality, can’t be guaranteed.
Insufficient light, the leaves of cabbage will become quite thick, so that the cabbage grew out of good quality, and very heavy, with high economic value, once the light is less, the leaves will not grow well.
The intensity of sunlight will also affect the way cabbage grows, if it is under strong light, it will grow open so that it can get more space to grow.
If it is under low light, cabbage will grow in clumps and grow into a round ball shape, the same way it does when it is cold.
Also if the sowing is done in autumn, it is better not to do it too early when sowing early, because the too high temperature often leads to poor plant growth.
In terms of temperature, basically all varieties like warm areas and have little resistance to cold, but the temperature is too high to grow, so when planting this crop, you must pay attention to the temperature.
Generally speaking, within the range of 12°C (53°F) and 22°C (71°F), it is basically safe.
Once it exceeds 30°C (86°F), cabbage will stop growing, and of course, if the temperature is below 10°C (50°F), cabbage will grow very slowly.
Also, if the temperature drops below minus two degrees, the entire plant will probably freeze right to death and will not recover.
The temperature needed for cabbage varies from period to period, and 20°C (68°F) is generally appropriate during the period when the seedlings are just emerging.
If the seeds are within this temperature, they will germinate in 1-2 days. If the temperature exceeds 20°C (68°F), the seeds will germinate quickly but will grow slowly after the seedlings emerge and the chances of rotting are greatly increased.
In the rosette stage, about 18°C (64°F) is generally the optimum temperature for growth. When it comes to bearing cabbage, the temperature is more arbitrary, as long as it is between 12°C (53°F) and 22°C (71°F), it can generally grow healthily.
Knowing this knowledge, we will be able to better control light and temperature to improve the yield of cabbage.
Cabbage has different water requirements at different growth periods.
Seedlings do not require much water, but germination and seedling emergence can be affected when the soil is below 10% moisture content.
Overly wet soils are less permeable and are not conducive to seed germination and seedling emergence.
The rosette period requires more water: seedlings and rosettes should pay attention to timely mid-tillage after watering so that the topsoil is kept loose and dry and the lower soil is kept in a good water-holding state.
Generally, the soil water content of 17%-19% at a depth of 20cm(6 inches) is more suitable. During the modulation period, which is the most water-intensive period, the ground should be kept moist, and the soil moisture content should not be less than 20% at a depth of 20cm (6 inches).