CSLB C-27 Landscaping ContractorPlanting and LandscapingMedium
A landscape maintenance crew is regularly pruning a formal hedge. To ensure uniform density and prevent lower branches from becoming sparse, which pruning principle should be consistently applied?
- APrune the top of the hedge wider than the base to maximize light penetration.
- BPrune the base of the hedge wider than the top to allow light to reach lower foliage.
- CPrune only the new growth at the very top to maintain height.
- DPrune all sides of the hedge equally, maintaining a perfectly rectangular shape.
Show answer & explanationAnswer & explanation
Correct answer: B. Prune the base of the hedge wider than the top to allow light to reach lower foliage.
Pruning a hedge so the base is wider than the top (a 'trapezoidal' or 'A-frame' shape) allows sunlight to reach the lower foliage. If the top is wider, it shades the bottom, leading to sparse growth and dieback on the lower branches due to lack of light.
Why the other options are wrong
- A. Pruning the top wider than the base would shade the lower branches, causing them to thin out and die due to insufficient light.
- C. Pruning only the top would lead to an overgrown, leggy hedge with reduced density and potentially weak lower growth.
- D. A perfectly rectangular shape often results in the lower parts of the hedge being shaded, leading to sparse growth over time.
Hedge Pruning for Density
The practice of shaping hedges with a wider base than top to ensure even light distribution and promote dense foliage from the ground up.
- Prevents lower branch dieback.
- Ensures uniform foliage density.
- Creates a 'trapezoidal' or 'A-frame' shape.
Memory trick: For a hedge to thrive, let the sun 'descend' to its base.