Do cacti need darkness? How to remedy cactus blackening?

Yes!

Cacti utilize sedum blue acid metabolism as part of their photosynthetic system.

Aspartic Acid Metabolism|Ask the biologist

Cacti absorb and store carbon dioxide at night, then wait until the day to complete their light-dependent reactions. Image Dgustafson

Cacti can survive for months without water because they require a very small amount of water for photosynthesis.

When plants open their stomata to obtain carbon dioxide needed for photosynthesis, they lose a lot of water, especially in hot, dry deserts.

Cacti only open their stomata at night and lose less water. The nights are cooler and less dry, which means less water is evaporated from the plants.

Most carbon dioxide enters plants through stomata, which are tiny openings that are protected by cells. Most of the stomata are found in the leaves of plants.

Even though cacti can absorb the required carbon dioxide at night, photosynthesis still requires sunlight. Cacti store carbon dioxide absorbed at night inside their cells to form a chemical called malic acid.

In CAM plants, carbon dioxide is only collected at night when the stomata are opened.

During the day, malic acid is converted into carbon dioxide. When exposed to sunlight, light reactions can create energy for the Calvin cycle, and carbon dioxide can be converted into sugar. This type of photosynthesis is known as sedum blue acid metabolism because carbon dioxide is stored as an acid during the night.

When cacti need daylight to enhance their photosynthesis and absorb carbon dioxide on cool nights (and maybe even when there is some condensation) rather than on scorching hot days, they can keep the daylight pores closed and avoid daytime dehydration through these open pores. This can help them retain their stored water until the next rain. It could take months or even years!

Plants with humid climates lose a lot of water from their leaves through transpiration, but can easily replenish water through their roots.

This is not the case in the desert, where many desert plants have evolved aspartic acid metabolism to avoid water loss.

No, cacti prefer more abundant sunlight. It is native to deserts, semi-deserts and high-altitude mountainous areas, because of its high value and strong vitality, it can be used for pot culture.

Cacti need darkness because if it is in a bright place for a long time, it may not be able to metabolize the waste products inside the body.

Cacti, like other plants, don't need darkness, and it's best if there is sunlight. But cacti rarely need water.

The blackening of the roots of the fresh palm is usually due to too much watering or too much moisture or soil deterioration, which causes the roots to rot.

The solution is to cut off the original roots, replant them, replace the original soil with sandy soil, and have a drainage hole at the bottom of the pot, which can prevent excessive watering and water soaking the cactus. Cacti that have cut their wounds must be dried before they can be planted.

Fresh human palms are drought-tolerant and not blister-tolerant. Water less on rainy days and in winter. You don't need to water too much, you can't apply too much fertilizer, and if you plant it on the balcony, you should give the cactus more sun.

When the cactus is black, you need to pay attention, maybe it is gradually rotting. You gently press the middle with something to see if it's all soft and rotten, if it is, you can't do anything.

If not, you do what he said, go outside in the sun, but not in the sun.

Again, you need to be careful: you need to control the amount of watering you have.

Don't pour water on top of the cactus when you water it, it will let it rot.

Try to water the edges of the cactus potting soil as much as possible.

But pour a small amount at a time.

If you water the cactus too much, it will rot the roots and leaves.

It means that the cactus is dying and you are not taking good care of it.

The main unhealthy causes of cacti placed indoors:

1. Too much water - When there is too much water, cacti are easy to rot.

2. Too high humidity - In the case of too high humidity, cacti are easy to rot.

3. Insufficient water supply - In the case of insufficient water supply, cacti are easy to stop growing and shrink.

4. Sudden cold - in the case of sudden cold, it is easy to cause frost damage, so that the roots of the cactus are damaged, leading to death.

5. Lack of sunlight - In the absence of sunlight, the growth of cacti will become weaker and weaker, and it is easy to get sick.

Your cactus is likely to be too watery, and it may have been over the standard when you bought it. It is also possible that the sudden cold has caused frost damage and poor growth.

Things to pay attention to and methods of breeding cactus:

1. Temperature, the general temperature is not a big problem, and the indoor temperature is sufficient.

2. Water, cacti should not be watered, but they should not be watered

In summer, it is permeable once every half to 1 month; When it is hottest, you can use light water once a week;

In winter, it is enough to give a permeable water once every 1 to 2 months.

3. Location, it can be placed outdoors in summer, and it is best to place it indoors in winter, and the location should be as far away from the window as possible, so as to avoid direct wind leakage from the window cracks;

4. Sunlight, it is best to see the location of the light, if it must be kept indoors, also choose a suitable day to let it bask in the sun.

ps.The cactus does not absorb radiation, do not leave it next to the computer for a long time, and give it sun.

There are many reasons why cactus spines turn black, such as low temperature, insufficient sunlight, too much fertilizer, excessive watering, pests and diseases, etc.

Here's how:

1. It is recommended to change the cactus to a warm and dry environment, suspend watering, and check whether there are pests and diseases.

2. Cut off the black area with a clean knife and cut it deeper. If you see that the center has also turned black, you can only remove the blackened bodies completely, and the affected ones will rot away.

3. The wound can be completely healed and then planted in the damp soil. Do not fertilize during the rooting period, remember.

If the ball center is black, it is basically hopeless, and the ball center is the growth point! If the growth point is dark, it is rotten from the heart, the cactus must bask in the sun, try not to water if you don't bask in the sun, you may not have watered it by someone who accidentally helped you water. There is also a possibility that if you put the cactus in an unventilated place, there is a possibility that a fungal infection called black fungus may develop, and it is basically hopeless.

Another point, the newly planted cactus must not be watered, with sandy soil to be planted to a place with the sun to be exposed, about half a month before watering, because at that time has already taken root, if planted after watering it is easy to rot. The amount of watering is appropriate to the surface of the moist soil layer, and must not be watered more or poured on the flowers, watered once a month in spring and autumn, once a month in summer, and can not be watered in winter. Rest assured that the plants of the Cactus family are not dry, and in his place of origin - the desert arid area may only rain once or twice a year or not at all, do not water too much!

You see if it's rotten, if it's not rotten, you can save it, replace the soil, replace the sandy garden soil, and then water it thoroughly, and then take it out to bask in the sun.

In the later stage, water once every 2 weeks, once a week in the summer, and cut off in the winter.

If there's something rotten, but it's not rotten yet, try to save it!

If you want to save it, you can consider cutting off the rotten part with a knife, and be sure to cut it clean. Then put it in a ventilated and dry place and wait for the wound to air dry. Then put it on the moist soil and wait for it to take root. After rooting, it is planted on the ground.

If not, buy another pot!

Cactus balls must be raised in the sun, and they can be properly shaded at noon in summer.

The other is to invite less watering, watering every two weeks in summer, once a month in spring and autumn, breaking water in winter, and watering once a week during the flowering season.

You can do without watering during the rainy season.。 The general rule is to dry before pouring. Water thoroughly every time.

Change the soil in the spring. The soil can be made of sandy garden soil. Of course, you can also mix the soil yourself. The specific depends on the variety of cactus...

It is recommended to go to the "Flower Walking Forum" to take a look...

The blackening of the sphere caused by the cactus should be a symptom of drying up and blackening after the potting soil board is hard. The potting soil planted with cactus has not been loosened for a long time, and the potting soil is tightly hardened due to the loss of nutrients after watering and the absorption and utilization of nutrients by the root system after a long time.

When watering, because the potting soil is too hard, the potting water flows out from the edge of the pot to the bottom of the pot, resulting in the illusion that the surface is moist and the heart soil is dry, because a large number of roots are in the heart of the pot and the soil in the center of the pot has no water, most of the roots will dry up and die;

Dead roots and susceptible to bacterial infections in pots produce disease, from root rot to bulb rot, and when the cactus rots and dries up, it becomes a black dead sphere.

Cacti are drought-tolerant, but they still have to be taken out to the sun

Depressed... To bask in the sun ...