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- Improper Watering. Irrigation errors are the most common and often deadly reason for your cactus turning yellow. Cacti are typically drought-tolerant, desert-dwelling species that like arid conditions.
- Inappropriate Light. Cacti are generally slow-growing, sun-loving species that need a minimum of 4 to 6 hours of sunlight per day and ideally up to 12 hours to thrive.
- Poor Drainage. Don’t plant your cactus in a standard potting soil. These succulents need a fast-draining medium to thrive and potting mixes specifically designed for cacti are easy to find in garden center, plant nurseries, or home improvement stores.
- Pest Problems. Cacti aren’t prone to many major pest problems, but if insects such as spider mites (which thrive in dry conditions), aphids, mealybugs, or scale infest the plant, it can result in yellow spots on the stem as they suck out the sap.
- Too Much Lighting
- Wrong Soil Type
- Overwatering
- Underwatering
- Not Enough Sunlight
- Poor Quality Soil
- Temperature Changes
- Too much/little Fertilizer
- Pests
- Various Diseases
Cacti can begin to yellow because they are receiving too much sunlight. The tricky part of diagnosing this problem is that, generally, cacti thrive in direct sunlight. However, if your cactus is potted and moved from an area that receives less sunlight than where you moved it, it can begin to get discolored from being sunburnt.
Your cactus can begin to yellow because of incorrect soil composition. Cacti require well-draining soil mixtures to thrive and do not do well in clay or compacted soil. If the roots of your cactus become compacted with too much dirt or clay, they may begin to rot- causing the cactus to be yellow.
Your cactus can begin to show yellowing from the base up when it has been overwatered. Overwatering puts your cactus at risk for yellowing as well. If you overwater your cactus, you put it at risk of root rot, and yellowing may begin to become observable, especially if the soil remains consistently damp and the temp is lower than 40 degrees Fahrenh...
Another reason for cacti yellowing can be underwatering. If you don’t water at least every 1-2 weeks during its active growing season and at least 3-4 weeks during its inactive seasons, you may be putting your cactus at risk for yellowing due to being underwatered. You should be giving your cactus enough water to moisten its soil at each watering s...
Just as it’s risky to give your cactus too much sunlight, it can also begin yellowing due to not getting enough direct sunlight. If your cactus begins to yellow, your cactus is in a darker area, and the above-listed causes have been ruled out, you might consider moving your plant so that it receives more sunlight.
Sometimes cacti can begin to yellow because of a lack of nutrients and vitamins in the soil they’re planted in. Cacti generally require soil that is aerated and has additional nutrients such as iron and calcium. Failing to meet these requirements and/or using regular potting mix instead of cactus/succulent soil mixes can cause yellowing in a cactus...
Another problem cacti face in terms of yellowing includes dramatic temperature changes. This is a common cause for yellowing in cacti and can be diagnosed easily- if the cactus has been moved from one place to another or by something that produces cold or heat, or even just has experienced a natural temperature shift outside, this may be the reason...
Cacti can turn yellow because of being fertilized too much or too little. Applying too much fertilizer can give your cactus a chemical burn or cause yellowing. Too much fertilizer containing salt can build up on the soil surface of your plant and block water from reaching its roots. To fix this, you should refrain from using fertilizer for two week...
Another common reason for cacti yellowing is the invasion of unwanted cactus predators and pests. These pests usually present themselves as mealy bugs or spider mites, which reproduce at exponential rates and are quickly and easily able to destroy the plant. You should look for not only yellowing but for the pests as well to be able to accurately d...
Cacti can also experience yellowing due to the contraction of various illnesses and diseases. One such infection is one that causes water-conducting tissues in the cactus to become necrotic, losing their ability to move water throughout the cactus’ other tissues. Another cause of yellowing can be an illness called chlorosis, usually caused by iron ...
- Incorrect watering. Although cacti are drought-resistant plants, they still need to be watered appropriately. Cactus always prefer the soil to dry out between each watering.
- Inadequate lighting. Light is essential in photosynthesis, where plants make their own food. Without sufficient lighting, a cactus may turn yellow, leggy, and stunted.
- Sunburn. While cacti plants prefer longer hours of direct sunlight, the high intensity may scorch the plants resulting in a yellow tint on their stems.
- Pest infestation. Although rare, cacti and succulents do get occasional insect pest infestations. Insect pests such as scale, mealybugs, and spider mites are known to damage the cacti plants as they suck juices.
Main Reasons for Cactus Turning Yellow. 1. Lack of water. If your cactus plant looks yellow (and shriveled) in summer, then first of all try giving the plant a really good soaking.Make sure you wet the root ball and allow the excess to drain away.
There could be many reasons cactus plants turn yellow. Some of the reasons are low light, sunburn, overwatering, underwatering, pest inflection, wrong propagation time, lack of nutrients, or improper soil mix. We can easily save yellow cactus by applying the following methods. Stem cutting.
Light and Sun Exposure. Cacti require a significant amount of sunlight to thrive. However, too much direct sunlight, particularly in already hot climates, can cause sunburn, leading to a yellowing or whitening of the cactus skin. Conversely, insufficient light exposure can cause cacti to become pale and yellow.
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Jan 26, 2024 · If this doesn’t solve the problem, make sure that there are no standing pools around its base and ensure it is getting enough sun and ventilation. 2. Insufficient Light: Finding the Right Balance. One common reason your cactus may turn yellow is that it needs more sun.
