How to Use Grass Shears: Manual & Plastic Shears Guide

To use grass shears effectively, hold the tool parallel to the ground, align the blades along the grass edge, and make smooth, controlled snipping motions. For plastic grass shears, keep the blades clean and avoid cutting wet or thick stems to prevent blade stress. Whether you're trimming lawn edges, tidying up borders, or cutting around obstacles, mastering the right technique saves time and keeps your garden looking sharp.

What Are Grass Shears and When Should You Use Them?

Grass shears are handheld cutting tools designed for trimming grass in areas a lawn mower cannot reach — such as along fences, flower beds, pathways, and around garden ornaments. They come in two main blade orientations: horizontal blades for edging and vertical blades for general trimming.

Plastic grass shears typically feature lightweight plastic handles (sometimes with plastic blade guards), making them ideal for light-duty trimming tasks. They are a popular choice for small gardens, balcony planters, and container plants due to their affordability and ease of handling.

Best Scenarios for Grass Shears

• Trimming edges along paved walkways or driveways
• Cutting grass around tree bases and garden beds
• Maintaining ornamental grasses in pots or raised planters
• Tidying up small patches too tight for a mower or strimmer
• Shaping decorative grass clumps with precision

Types of Grass Shears: Choosing the Right One

Before learning how to use grass shears, it helps to understand which type suits your task. The blade orientation and handle material both affect performance and comfort.

Plastic grass shears are best suited for light, frequent trimming rather than heavy or overgrown vegetation. If you're working with thick grass clumps or dense stems, a metal-bladed alternative will provide more durability and cutting force.

How to Use Grass Shears: Step-by-Step

Using grass shears correctly reduces fatigue, prevents blade damage, and produces a cleaner cut. Follow these steps for best results:

1. Choose the correct blade orientation — use horizontal blades for flat edging along borders, and vertical blades for cutting upright grass stems.
2. Hold the handles firmly but relaxed — grip the shears with both hands if they are long-handled, or one hand for handheld models, keeping your wrist neutral to avoid strain.
3. Position the blades parallel to the cutting surface — for edging, keep the blades flat and level with the ground to ensure an even trim line.
4. Make short, controlled snipping motions — do not force the blades through thick clumps. Work in small sections of roughly 15–20 cm at a time for cleaner results.
5. Move along the edge consistently — maintain a steady pace and consistent blade angle to create a uniform finish.
6. Clear cuttings regularly — remove trimmed grass as you go so it doesn't interfere with your cutting line or clog the blades.
7. Wipe and dry the blades after use — especially important for plastic grass shears, as moisture and plant sap can cause blade stiffness over time.

Tips Specific to Using Plastic Grass Shears

Plastic grass shears are lightweight and affordable, but they require slightly different handling than metal tools. Understanding their limitations helps you get better results and extend their lifespan.

Do's

• Use them on thin, soft grass under 6 mm in diameter for smooth cutting action
• Trim dry grass — wet grass is heavier and can stress plastic components
• Clean blades with a damp cloth after each session to prevent sap buildup
• Store indoors or in a shaded area to prevent UV degradation of plastic parts
• Use light oil on the pivot point every few months to maintain smooth blade movement

Don'ts

• Don't force them through thick ornamental grasses or woody stems — this can crack plastic joints
• Avoid leaving them outside in freezing temperatures, which can make plastic brittle
• Don't use harsh chemical solvents for cleaning — these degrade plastic materials
• Avoid pressing the blades sideways against hard surfaces, which can warp the pivot alignment

How to Maintain Grass Shears for Long-Term Performance

Regular maintenance is what separates a shear that lasts one season from one that works reliably for years. Even inexpensive plastic grass shears can outlast pricier tools if properly cared for.

Cleaning After Each Use

Wipe down the blades with a dry or lightly damp cloth to remove grass sap, soil, and moisture. If sap has hardened on the blades, use a small amount of rubbing alcohol on a cloth — this is safe for both metal blades and most plastic components.

Sharpening the Blades

Dull blades tear grass rather than cut it, leaving ragged brown edges. For metal-bladed shears, use a fine-grit sharpening stone (around 400–600 grit) and draw it along the beveled edge at a consistent angle. Plastic-body shears with metal blades can be sharpened the same way. Fully plastic blades (uncommon) typically cannot be resharpened and should be replaced when worn.

Lubricating the Pivot

Apply a drop of light machine oil or WD-40 to the pivot point every 4–6 weeks during the growing season. Open and close the blades several times after applying to distribute the oil. This keeps the cutting action smooth and reduces hand fatigue.

Seasonal Storage

Before storing for winter, clean and dry the blades thoroughly, apply a thin layer of oil to prevent rust or corrosion, and store in a dry indoor location. For plastic grass shears, keep them away from direct sunlight and frost, both of which accelerate plastic degradation.

Common Mistakes When Using Grass Shears

Even experienced gardeners make errors that reduce the effectiveness of their shears or damage the tool. Avoid these frequent missteps:

• Cutting too much at once: Attempting to shear overgrown areas in a single pass strains the blades and produces an uneven cut. Trim in layers instead.
• Using the wrong blade orientation: Using vertical-blade shears for flat edging, or horizontal-blade shears for upright trimming, results in poor angles and awkward handling.
• Ignoring blade sharpness: Studies of garden tool performance suggest that dull blades require up to 40% more force to make the same cut, significantly increasing hand fatigue.
• Skipping lubrication: A dry pivot causes the handles to resist opening, making every snip feel like a struggle.
• Cutting wet grass with plastic shears: Wet grass adds weight and resistance. Plastic components can flex under this added load, leading to misaligned blades over time.
• Not wearing gloves: Repetitive cutting motions without gloves can cause blisters, especially during a long session of border trimming.

Grass Shears vs. Other Trimming Tools: Which Should You Use?

Understanding where grass shears fit within your toolkit helps you choose the right tool for each job, saving time and effort.

For most home gardeners, grass shears work best as a finishing tool used after mowing to tidy edges and reach spots that power tools miss. Plastic grass shears fill a valuable niche for those with smaller gardens or container plantings where precision and lightweight handling matter most.