Succulent plants offer an irresistible allure due to their ease of care and an array of variably colored and shaped varieties. However, like any other plants, succulents are not immune to diseases. Fortunately, with the right insights, you can address most of these diseases and get your succulents back to health. This guide provides an in-depth understanding of the most common succulent diseases and their cures.
Root Rot
Arguably one of the most common issues affecting succulents is root rot. It manifests through a discoloration of leaves starting from the bottom, causing them to appear black or brown. Eventually, root rot causes entire plant collapse.
The main trigger of root rot is overwatering. Succulents naturally thrive in dry conditions, hence require less water. Wet and damp conditions provide perfect environments for fungi, which cause rot to flourish.
To cure root rot, start by cutting off the rotted roots. Sterilize your cutting tool with rubbing alcohol before and after use to prevent disease spread. Let the succulent plant dry out completely for several days before replanting in fresh, dry succulent soil. Pay attention to your watering habits to prevent future occurrences of root rot.
Mealybugs and Scale
Mealybugs and scale insects are pests, not diseases. However, their impact on succulents is so significant it’s worth discussing them here. These pests exhibit themselves as small, cotton-like or shield-shaped spots on plants. As they suck sap out of succulents, these plants can turn yellow, get distorted, or even die.
You can treat mealybugs and scale using insecticidal soap or neem oil. It’s essential to spray all the affected parts thoroughly, as even a single surviving bug or scale can quickly repopulate.
Ants
Ants themselves don’t pose much harm to your succulents. However, they can sometimes attract pests such as aphids, scale insects, and mealybugs that can damage your succulents. If you notice ant activity around your succulents, it could be a sign of an underlying pest problem.
Eliminate ants using traps or natural methods such as cinnamon or vinegar. A long-term solution would be to use ant baits that poison the ants, affecting the entire colony.
Fungal Infections – Black Spot, Powdery Mildew and Rust
Fungi can cause severe problems in succulents. Black spot appears as dark spots on the leaves or stems; powdery mildew presents itself as white dust or spots on any part of the plant, while rust produces rusty-colored spots on the leaves.
Effective treatment of fungal infections primarily involves using fungicides. However, it also requires good gardening hygiene, such as clearing any decaying plant matter that might harbor fungi.
Etiolation
Etiolation, otherwise known as stretching, happens when succulents aren’t getting enough light. They start to stretch out and become leggy, losing their compact rosette features.
To cure etiolation, introduce more light to the plant. Moving it to a sunnier location or supplementing natural light with a grow lamp is helpful. Unfortunately, the stretched part won’t revert to its former condensed form, but it will halt further stretching.
Edema
Another succulent problem caused by overwatering is edema. When a plant absorbs more water than it can use, the excess water causes cells to burst, leading to blister-like bumps on the leaves.
While these cannot be cured or reversed, you can stop further development. Cut back on watering; allow the soil to dry out completely before watering again, and make sure the succulent is in a well-draining soil and pot.
Nutrient Deficiency
While succulents require fewer nutrients compared to other plants, they can show symptoms of nutrient deficiency, exhibiting stunted growth and color changes. The most commonly deficient nutrients are nitrogen, phosphorus, and potassium.
Fertilizing your succulents during their active growing season can help recompense nutrient deficiencies. Succulents benefit from balanced fertilizers that contain equal amounts of nitrogen, phosphorus, and potassium, but slightly higher potassium levels may be beneficial.
Spider Mites
Infestation by spider mites often appears as small, yellow speckles on the leaf surfaces. While one or two of these arachnids won’t harm your plants, a full-blown infestation can quickly lead to your succulent’s demise.
Keep spider mites at bay by maintaining high humidity and ensuring adequate watering. You can also use insecticidal soap or neem oil as a preventive measure.
This guide offers insights into common succulent diseases coupled with effective treatments. While some diseases may cause irreversible damage, catching the problem early always increases the survival chances of your succulents. Therefore, a regular checkup on your succulent plants helps in early detection and effective combating of any potential threat. Keeping your succulents properly cared for will help in preventing most of these common succulent diseases in the first place.
