Early in the morning to succulent watering, you suddenly found that the edges of the leaves with a faint yellow, A closer look, several leaves had lost the fullness of the previous day's luster -- this in the end what was going on? Obviously, every day, careful care, succulent but still turned yellow, really makes people anxious. In fact, succulent leaves turn yellow because they are “passing signals”, behind which hides the maintenance of small problems. Today, crack these signals one by one to help you find out the reasons why succulents turn yellow so that they rejuvenate. 

Common causes and solutions for succulents turning yellow 

Too much watering, root system “drowning”

What succulents are most afraid of is waterlogged potting soil, the root system can't breathe when it's soaked in water for a long time, and then it will rot and can't absorb the nutrients and water, and the leaves will start to turn yellow from the bottom, soften, and come off easily when touched with your hand.
Judgment: The potting soil is sticky and wet, with a slight musty smell, and the yellowed leaves are concentrated at the bottom and feel soft and rotten. 
Solution: Immediately stop watering, take the succulent out of the pot, cut off the rotted roots, soak it in carbendazim solution for 10 minutes to sterilize it, and then replace it with The One Bloom's succulent-specific granular soil (70% granular, highly breathable), repot it, put it in a ventilated place, and do not water it for a week. 

Improper lighting, either sunburn or lack of light 

Too much light: Strong light in the middle of the day in summer can burn succulent leaves, causing them to develop yellow-brown spots or turn yellow at the edges. 
Judgment: The yellowed leaves are mostly on the side facing the sun, with obvious scorching marks. 
Solution: Move the succulent to a place with plenty of diffused light, such as an east-facing windowsill, avoiding direct midday sunlight. Slightly sunburned leaves can be retained, while severely burned ones should be cut off. 
Insufficient light: Succulents that have been placed in the shade for a long period of time will have leaves that are thin, yellow, and dull in color, which is caused by insufficient photosynthesis. 
Judgment: The leaves are yellowish overall, and the stalks are slender and growing at an angle toward the direction of light. 
Solution: Allow the succulent to receive 3-4 hours of diffused light per day, or use a plant filler light ($20-30), about 30 centimeters away from the plant, for 5 hours per day. 

Improper fertilization: either burns the roots or lacks fertilizer. 

Too much fertilizer: High concentrations of fertilizer can burn the root system, causing the tips of the leaves to turn yellow or even scorch black, often starting with the new leaves. 
Judgment: If you have recently applied fertilizer, the new leaves will turn yellow first, and the leaves will have scorched spots. 
Solution: Rinse the potting soil with water, dilute the concentration of fertilizer, and change the soil if it is serious. After that, you should follow the principle of “thin fertilizer and diligent application” in applying fertilizer, and choose The One Bloom's succulent-specific slow-release fertilizer, which can be applied once a month. 
Lack of fertilizer: long-term, without fertilizer, the potting soil will not have enough nutrients, succulent leaves will turn yellow, slow growth, and a light color. 
Judgment method: leaves uniformly yellow, no scorched spots, the plant is overall weak. 
Solution: Apply diluted liquid fertilizer once a month during the growing period to replenish nitrogen, phosphorus, and potassium elements, so that the leaves can regain their full color. 

Soil sloughing, root system “lack of oxygen”

Potting soil is not replaced for a long time, it will become hard, with poor permeability, the root system can not stretch, can not absorb enough oxygen and nutrients, and the leaves will slowly turn yellow.
Judgment method: water penetration is very slow when watering, the surface of the potting soil is dry and cracked, and the yellowed leaves are more evenly distributed. 
Solution: Change the pot in time, use The One Bloom's special nutrient soil for succulents (containing peat, perlite, and vermiculite, loose and breathable), and gently break up the old soil around the roots when changing pots, so that the new soil is closely combined with the roots. 

Pests and diseases attack, leaves are “nibbled” 

Pests such as mesquite and red spider will suck the sap from succulent leaves, causing yellow spots on the leaves, and in severe cases, the whole leaf turns yellow and wilts; fungal diseases will also cause yellow spots to appear on the leaves, which will gradually expand.
Judgment method: There are tiny insect bodies or white flocculent material on the leaves, and the yellow spots are irregular in shape and will gradually spread. 
Solutions: For a small number of pests, wipe the leaves with a cotton swab dipped in alcohol; for a larger number of pests, use The One Bloom's Succulent Specialty Insecticide ($10-$15) and spray according to the directions; for diseases, cut off the diseased leaves in a timely manner and spray with a carbendazim solution to control the disease.