Common Causes for ZZ Plant Leaves Turning Brown
If you’re noticing that your Zamioculcas Zamiifolia (ZZ) plant’s deep, glossy green leaves are starting to turn brown, don’t panic! There are several common reasons why this might be happening, and with a little attention and care, you can help your plant recover its health and vitality.
The Most Common Issues Causing a ZZ Plant’s Leaves to Brown:
Overwatering
One of the most common reasons why the leaves of your ZZ plant turn brown is overwatering. ZZ plants are sensitive to waterlogged soil, which can lead to root rot and cause the leaves to wilt and discolor. To address this issue, allow the soil to dry out between waterings and avoid giving your ZZ plant too much water. Ensure that the pot has proper drainage to prevent water from pooling at the bottom, and consider repotting your plant in well-draining soil if necessary.
Underwatering
Conversely, underwatering can also cause ZZ plant leaves to turn brown and dry out. So, make sure you’re giving your ZZ plant enough water, especially during the growing season. Check the soil moisture regularly and water your plant whenever the top inch of soil feels dry to the touch.
Poor Drainage
Poor drainage is another common issue that can contribute to brown ZZ plant leaves. If your plant is sitting in a pot without drainage holes, excess water can accumulate at the bottom and lead to root rot. Ensure that your plant’s pot has adequate drainage and consider repotting it in a new pot with drainage holes if necessary.
Low Humidity
ZZ plants prefer moderate to high humidity levels, and lack of humidity & dry air can cause the tips of the leaves to turn brown. Increase humidity around your plant by placing a humidifier nearby or misting the leaves occasionally. You can also place a tray of water filled with pebbles beneath the plant to create a humid microclimate.
Exposure to Direct Sunlight
This indoor plant prefers bright, indirect light but can tolerate low light conditions. Exposure to direct sunlight, especially during the hottest part of the day, can cause the leaves to burn and turn brown. Move your plant to a location with filtered or indirect sunlight to prevent sunburn.
Pest Problem
While ZZ plants are relatively resistant to pests and diseases, they can still be susceptible to issues like spider mites or fungal infections, which can cause brown spots or discoloration on the leaves. Inspect your plant regularly for signs of pests or diseases and take appropriate measures to treat them if necessary. This may include wiping down the leaves with a mild soap solution or applying a natural insecticide.

Additional Factors that Could Lead to Brown Tips:
Environmental Factors
Evaluate the plant’s surroundings for any environmental stressors that may be contributing to browning. Factors such as extreme temperatures, drafts, or exposure to air conditioning or heating vents can cause leaf damage. Adjust the plant’s location to provide more stable conditions.
Water Quality
Consider the quality of the water you’re using to irrigate the ZZ plant. Tap water containing high levels of chlorine or fluoride can cause leaf browning over time. Use distilled water or allow tap water to sit out overnight before watering to allow any chemicals to dissipate.
How to Support New Growth:
If you notice new shoots emerging from your ZZ plant, it’s a sign of growth and vitality. Here’s how you can adjust care to support the new stem.
- Watering: With new growth, the plant may require slightly more water to support its development. However, avoid overwatering, as ZZ plants are susceptible to root rot. Adjust your watering schedule accordingly, allowing the top inch of soil to dry out between waterings.
- Lighting: Ensure the new shoot receives adequate but indirect sunlight. As mentioned, ZZ plants prefer bright, indirect light, so position the plant near a window with filtered sunlight or provide artificial light if necessary. Avoid placing it in direct sunlight, as this can cause leaf burn.
- Fertilizing: Consider providing a diluted, balanced houseplant fertilizer to support the new growth. Choose a fertilizer specifically formulated for indoor plants and apply it sparingly according to the package instructions. Avoid over-fertilizing, as this can lead to fertilizer burn.
- Pruning: As the new shoot develops, monitor the overall shape of the plant. Prune away any dead or yellowing leaves to maintain a neat appearance and redirect the plant’s energy toward healthy growth.
- Humidity: ZZ plants are tolerant of low humidity levels, but increasing humidity slightly can benefit new growth. Consider misting the plant occasionally or placing a humidity tray nearby to provide a slightly more humid environment.
- Patience: Allow the new shoot to grow and develop naturally, providing consistent care and monitoring for any signs of stress or issues. With proper care, your ZZ plant will continue to thrive and produce new growth over time.
Why ZZ Plants are Perfect for Any Home or Office:
- Low Maintenance: One of the most appealing aspects of ZZ plants is their reputation for being incredibly low maintenance. They thrive in a variety of indoor conditions and can tolerate neglect, making them a great plant for busy individuals or those with little experience caring for plants.
- Drought Tolerance: ZZ plants have succulent-like stems and fleshy leaves that store water, allowing them to survive extended periods without watering. This drought tolerance means you don’t have to worry about watering them frequently, making them ideal for forgetful or busy plant owners.
- Adaptability to Low Light: ZZ plants are known for their ability to thrive in low light conditions, making them suitable for areas of your home or office that receive minimal natural sunlight. This adaptability makes them versatile and allows you to place them in various locations around your space.
- Air Purifying Qualities: Like many common houseplants, ZZ plants have been shown to help improve indoor air quality by removing toxins and pollutants from the air. Having a ZZ plant in your home can contribute to a healthier indoor environment for you and your family.
- Aesthetic Appeal: With their glossy, deep green leaves and modern, architectural appearance, ZZ plants add a touch of elegance and sophistication to any space. Whether used as a standalone statement piece or incorporated into a plant arrangement, they bring a sense of natural beauty indoors.
Watering Guidelines for a ZZ Plant:
- Assess Moisture Levels: Before watering your ZZ plant, always check the soil’s moisture level first. Insert your finger into the soil up to the first knuckle. If the soil feels dry to the touch, it’s time to water. If it still feels slightly moist, wait a few more days before checking again.
- Watering Frequency: ZZ plants prefer to dry out between waterings to prevent overwatering, which can lead to root rot. In general, aim to water your ZZ plant every 2-3 weeks during the growing season (spring and summer) when it’s actively growing. Reduce watering frequency to once a month or even less during the dormant season (fall and winter months).
- Watering Method: When it’s time to water, thoroughly moisten the soil until water begins to drain out of the bottom of the pot. Allow excess water to drain away completely because, as mentioned, ZZ plants don’t like sitting in waterlogged soil. Empty the saucer or cache pot to prevent the plant from sitting in standing water.
- Adjust Based on Conditions: Environmental factors such as temperature, humidity levels, and the amount of light the plant receives can affect its watering needs. During hot, dry weather or if the plant is placed in a location with increased airflow (e.g., near a vent), you may need to water more frequently.
- Observe Plant Health: Pay attention to how your ZZ plant responds to your watering routine. If you notice yellow leaves or if your plant is developing soft, mushy stems, it may be a sign of overwatering. Conversely, if the leaves become wrinkled or curl at the edges, it could indicate underwatering.