Pruning pampas grass is no minor task, but its significance should not be underestimated. Known for its invasive tendencies, this plant can quickly become unmanageable without annual upkeep. In this guide, we'll explore the when, why, and how of pampas grass pruning.
The Significance of Pampas Grass Pruning
Pampas grass, left unchecked, can easily expand and become unruly. To prevent this, regular pruning, typically done on an annual basis, is a must.
Timing Your Pruning
The ideal pruning time typically aligns with spring. This timeframe, however, is subject to change depending on factors like weather conditions and the emergence of new shoots. The window for pruning usually extends from March to May, following the last frost.
The Rationale for Spring Pruning
Pruning in the spring serves two main functions. It clears away old stems to make way for new shoots, fostering healthier growth. Pruning can start once the new shoots have grown to about 5 inches.
Executing the Annual Spring Prune
Preparation
Appropriate equipment and attire are required for a thorough prune. Long-sleeved clothing, cut-resistant gloves, and safety goggles are recommended to protect against the sharp leaves. Instead of trimmers, opt for a chainsaw or long-handled pruner to handle the task.
Pruning Steps
- Before you start, inspect the base of the pampas grass for any animals that may be hiding.
- Cut the leaves close to the base, leaving a tuft of branches approximately 5 inches high.
- Work in sections to make the process more manageable.
- Apply a suitable fertilizer to facilitate recovery and healthy growth.
- Be careful to avoid damaging new shoots during the pruning process.
Thinning the Cluster
Every 2 to 3 years, a thinning of the pampas grass cluster is recommended. The plant typically has a main cluster with smaller ones emerging from it. These smaller clusters should be removed to maintain the shape of the main one and control the plant's growth. This thinning can be done concurrently with the annual pruning. To separate the roots of the clusters, an axe or saw may be needed.