The biggest issue with root rot is that it can often go unnoticed due to its location beneath the soil's surface. Sometimes you can smell root rot, as it gives off a moldy and pungent odor around the plant's base. In extreme cases, root rot can kill your entire snake plant within 8 to 10 days.
Mealybugs are one of the most common plants, not only to snake plants particularly but to many indoor and outdoor household plants. These small, pink-colored insects are covered in a waxy white substance that helps protect them from excess heat and moisture loss, making them a very common issue with snake plants due to their dry texture.
Spider mites are another pest common on snake plants. These pests are usually spotted on the plant's leaves' underside, and they feed on the water inside of the leaves, leaving them weak with holes and bite marks. What makes spider mites especially burdensome is their discrete nature. They will often go unnoticed for days or even weeks before you can see signs of their damage.
Southern Blight is a common fungus on snake plants that is caused by Sclerotium rolfsii. This fungus attacks the snake plant by penetrating its stems and eating away at them over a period of days. Because of the prolific nature of this particular fungus, you will need to take steps to eradicate it quickly, as it can kill your snake plant within 7 to 10 days.
Snake plants can also develop a case of red leaf spot. This disease is caused by the fungus Drechslera erythrospila. A red leaf spot is more commonly seen during the warmer months of the year when the fungus spores look for damp surfaces on the leaves to stick to.
An unhealthy snake plant will reveal itself within a matter of days or a couple of weeks. The most notable signs will be on the leaves of the plant. For example, if you notice that your snake plant leaves are falling over, curled, or turning brownish-yellow, the chances are that the plant is in a high state of stress. If the plant is overwatered, the leaves may appear soggy or feel mushy to the touch. Snake plant leaves should be erect and shiny with a bright green hue.