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What Causes Cacti Browning - Varnish + Vine

What Causes Cacti Browning

It may have begun gradually unnoticed. Now, your San Pedro Cactus shows a noticeable color change from green to brown. This discoloration indicates an underlying issue with various possible causes. Let's explore the common reasons, ranging from simple resolutions to complex scenarios.

Low-Light Conditions

Cacti enjoy lots of sun in the arid places in which they live. They’re well-adapted to these conditions, too. Although some species go dormant in the winter, this doesn't mean these plants can endure a lack of adequate sunlight. Even cacti that are tolerant need some light. Relocating your plant to a sunny room could be a simple remedy.

Over Watering

Cacti have evolved to conserve water and use it efficiently when it’s available. That’s one reason why they are shallow-rooted. That allows them to soak up any precipitation that falls quickly. However, it also means they can’t tolerate too much of a good thing. Some cacti only need watering once a month. Over watering can cause your plants to turn brown or worse.

Sunburn

Cacti thrive in indirect bright light, as direct sunlight can lead to sunburn. The browning you observe indicates the beginning of damage. To prevent further burn, relocate your plants away from direct sunlight.

Root Rot

Over watering could worsen the situation as root rot may develop. Cacti have no mechanism to prevent absorbing excess moisture, leading to mold and fungus growth that can harm the plant. You may detect a foul odor from your Cactus or softening of its trunk.

Corking

Corking characterizes a state where a cactus browns at its base and hardens, responding to stress like excessive sun or animal damage and facilitating plant growth. The thicker outer layer, due to corking, enhances weight support as new limbs form.

It's impossible to intervene once browning occurs. Some attempt to trim the affected areas, but it may harm the cactus. The key is prevention by maintaining optimal growing conditions. This reduces stress and preserves the vibrant colors without browning.

Final Thoughts

Cacti sometimes are a challenge to grow. They’re different than other houseplants in their watering and light needs. The essential thing to remember is that these plants live in relatively stable environments. Stress, over watering, or too much light can cause ill effects, such as browning, yellowing, or leaf drop. The best way to keep them happy is to make it feel like home to them.

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