Cat grass is typically a mix of fast-growing cereal grains, such as oat, wheat, barley, or rye grass. These grasses offer a safe, fibrous treat for domestic cats that aids in digestion and provides certain micronutrients. Since cat grass is botanically a short-lived annual plant, maximizing its lifespan requires specific attention to its environmental needs from the moment it is sown.
Creating the Ideal Growing Environment
The placement of cat grass directly influences its growth rate and health. Cat grass thrives under bright, indirect light, mimicking the conditions of a partially shaded field. Placing the container near a south- or west-facing window is beneficial, but intense afternoon sun can scorch the delicate blades, causing the tips to brown and dry out.
Maintaining a stable temperature is important for sustained growth. Cat grass prefers standard indoor room temperatures, between 60 and 75 degrees Fahrenheit. Avoid placing the grass near sources of temperature fluctuation, such as heating or air conditioning vents, as drafts or extreme cold can stunt growth and shorten the plant’s viability.
The foundation of a healthy plant starts with its container and substrate. The container must have adequate drainage holes to allow excess water to escape. Using a standard, lightweight potting mix, rather than heavy garden soil, provides necessary aeration for the root system and prevents compaction, which causes poor root development.
The Importance of Precise Moisture Control
Inconsistent or improper watering is the most frequent reason cat grass fails to thrive long-term. While these grasses require consistent moisture for rapid growth, they are susceptible to root rot if left in saturated soil, so the goal is to maintain a damp environment without waterlogging.
A simple method for checking moisture levels is the “finger test.” Insert a finger about an inch deep into the soil; if the top layer feels dry, the grass needs water, but if it feels wet, wait another day or two. Overwatering deprives the roots of oxygen, leading to anaerobic conditions that promote decay.
When using a saucer underneath a drained pot, empty any standing water within 15 to 20 minutes of watering. Allowing the roots to soak in residual water for extended periods defeats the purpose of the drainage holes. The water is wicked back up into the soil, creating a perpetually sodden environment.
A superior technique for moisture delivery is bottom watering. This involves placing the pot in a shallow dish of water, allowing the soil to wick moisture upward through the drainage holes. Bottom watering ensures the roots are hydrated evenly, prevents surface soil compaction, and avoids damp conditions that encourage fungal growth.
Maintaining Longevity and Dealing with Common Issues
Even with perfect care, cat grass is genetically programmed to be an annual and will eventually die back. Proper trimming can significantly extend the period of usable growth. Use clean scissors to cut the blades about half an inch above the soil line, which encourages the plant to produce new shoots rather than allowing the existing blade to reach senescence.
A frequent issue is the appearance of white, fuzzy mold on the soil surface. This fungal growth is caused by poor air circulation combined with overwatering. To mitigate this, reduce watering immediately and ensure the grass is placed in an area with better airflow.
For minor outbreaks, gently scraping the affected top layer of soil can help eliminate mold spores. If the issue persists, or if small, dark-winged fungus gnats appear, the infestation may be too severe for simple remedies. Using non-toxic treatments like diatomaceous earth on the soil surface or deploying sticky traps is advisable, though starting a new batch is often the most practical solution.