Underwatering
Underwatering occurs when a plant does not receive enough water, leading to symptoms such as wilting, leaf drop, and scorched leaf edges. This condition is common in plants that are not watered regularly or are in environments with high temperatures and low humidity.
What you see
Underwatering is a condition where a plant receives insufficient water to meet its physiological needs. This can result in the plant's inability to maintain turgor pressure, leading to wilting and other stress symptoms. Unlike diseases caused by pathogens, underwatering does not involve any infectious agents. The symptoms can often be mistaken for those of certain diseases, but the absence of pathogens and the improvement of symptoms with proper watering can help differentiate underwatering from other issues. In severe cases, prolonged underwatering can lead to permanent damage or plant death, but most plants can recover if the issue is addressed in time.
Symptoms
- Wilting
- Leaf drop
- Scorched or crispy leaf edges
- Stunted growth
Why it happens
Insufficient water supply to the plant, often due to infrequent watering or high evaporation rates.
Conditions that favour it
- High temperatures
- Low humidity
- Infrequent watering
- Sandy or fast-draining soil
- Windy conditions
Plants most affected
- Tomato
- Rose
- Ficus
- Fern
- Peace Lily
- Spider Plant
- Cactus
- Succulents
- Basil
- Mint
How to correct it
Educational information only, and not a substitute for professional diagnosis. Identify the problem before treating it, and check that any product is registered for this plant and this use where you live.
Cultural control
- Increase watering frequency
- Water deeply to reach root zone
- Mulch to retain soil moisture
- Adjust watering based on weather conditions
Prevention
- Regularly check soil moisture
- Water plants early in the morning
- Use mulch to conserve moisture
- Choose drought-tolerant plants for dry areas
Sources
- University of California Agriculture and Natural Resources
- Royal Horticultural Society
- Colorado State University Extension