What are the causes of and treatments for root rot in snake plants?

Snake plant, also known as tiger tail sansevieria or thousand-year orchid, is called the lazy person's plant by flower enthusiasts because it is easy to care for, highly adaptable, and blends harmoniously with all kinds of home decor styles. However, root rot can also occur while growing snake plants, so what are the causes of and treatments for root rot in snake plants?

I. Causes of root rot in snake plants

1. Overwatering

The root system of the snake plant is not well developed and is a fleshy root, so it is often planted shallowly. When flower enthusiasts water too much, the water in the potting soil cannot evaporate in time, and over time this causes root rot in the snake plant.

2. No soil change for a long time

Snake plants are usually repotted every two years. If the soil is not changed for a long time, the nutrients in the soil are exhausted and air is scarce, which hinders root respiration and causes root rot. In addition, long-term fertilizing means the fertilizer effect cannot fully dissipate and accumulates in the potting soil, seriously affecting root growth.

3. Poor ventilation in the growing environment

Snake plants do not have high light requirements, but the environment must be well ventilated. If they remain in a stuffy, hot state for a long time, the leaves cannot absorb water, which likewise affects root growth.

4. Pests and diseases

During the growth of snake plants, they can suffer from root rot disease and nematode damage, causing root injury and even decay.

II. Treatments for root rot in snake plants

1. Repot frequently

Repot once every two years, replacing half the soil with new soil, and disinfect the soil by exposing it to the sun or watering it with a sterilizing agent. Choose fertile, loose, humus-rich soil with good drainage.

2. Water less

Snake plants do not need much water to grow; keeping the potting soil moist is enough. If you do not know how much water to give, you can use the soaking method to reduce water accumulation in the pot. Reduce watering in winter.

3. Replant

Snake plants that already have root rot can be repotted and planted again. First clean away the rotted part of the roots, and if conditions allow, sterilize with a fungicide such as carbendazim, then dry in a cool place and replant to grow new roots (it is recommended to root them in a cutting medium such as plain sand + vermiculite + peat before planting).

If the root rot is severe and the root ball has an off smell, you must wash off the old soil, cut off the rotted roots, and replant. Before planting, soak the roots in a 1:800 potassium permanganate solution to prevent rot and promote rooting. After planting, place in a cool place to recover for a week, during which time stop fertilizing and control watering.

Friendly reminder: It is now winter, and snake plant care has entered a “high-risk period.” To prevent problems before they occur, even if the snake plant is in a relatively warm environment, you should still control its water, otherwise if the temperature suddenly drops low, the snake plant will also rot. Therefore, controlling watering in winter and keeping the potting soil slightly dry can avoid the phenomenon of snake plant rot.