Why clean, sharp secateurs are a wildlife gardener’s best friend

Secateurs are the hardest-working tool in most British gardens. They trim roses, shape hedges, deadhead perennials and cut back unruly shrubs that would otherwise crowd out the very wildlife you are trying to encourage. A sharp pair makes clean cuts that heal quickly, while a dirty pair can drag fungal spores and bacteria from one plant to the next. In a wildlife-friendly garden, where you might be pruning native hedging, flowering herbs or berry-bearing shrubs, that matters more than you might think. Clean blades also mean less bruising, so plants recover faster and provide better cover and food for birds, bees and butterflies. The good news is that caring for secateurs takes only a few minutes, and it is a lovely job to do in a cosy potting shed or summerhouse while the rain taps on the roof.

Gathering your kit and taking the secateurs apart

Before you begin, find a clear workspace. A tray with a lip is ideal, because small springs and pivot nuts have a habit of vanishing into gravel or grass. You will need a small screwdriver or adjustable spanner, wire wool in a fine grade such as 0000, an old toothbrush, a cloth, a diamond file or fine whetstone, and a light machine oil. If your secateurs are stiff with rust, apply a little penetrating oil to the pivot and leave them for ten minutes before forcing anything.

Most bypass secateurs have a central pivot bolt, a spring and a locking catch. Anvil secateurs work differently, with a single blade pressing against a flat anvil plate, but the cleaning routine is similar. Undo the pivot nut carefully and lay the parts out in the order they came apart. Watch for washers and spacers. If the spring is under tension, hold it steady so it does not ping across the shed. Never prise a seized blade with a screwdriver, as you can bend the alignment.

• Work over a tray or old tea towel to catch small parts.
• Keep left and right blades separate if they are not identical.
• Note which side the spring sits on before removing it.
• Take a quick photograph with your phone if you are unsure — it saves fiddling later.

Scrubbing off sap, rust and garden grime

Fill a small bowl with warm water and a drop of washing-up liquid. Dip the wire wool and scrub the blades, especially the bevel — the angled cutting face — and the flat side. Sap from conifers, roses and euphorbia can set like glue, so work patiently rather than pressing hard. An old toothbrush is perfect for cleaning around the pivot and the spring recess. For stubborn resin, dampen a rag with white spirit and wipe the metal, then wash again with soapy water.

Rust responds well to wire wool and a little oil. Scrub along the blade rather than across it, and avoid rounding the cutting edge. Do not soak wooden handles; wipe them with a barely damp cloth and dry them immediately. Once clean, rinse the metal parts and dry them thoroughly with a cloth. Any moisture left behind will undo your good work. If the blades are pitted with deep rust, accept that they may never be perfect, but removing the surface rust will still improve the cut and protect the pivot.

Sharpening the bevel correctly

Sharpening is where many gardeners go wrong. The secret is to follow the existing bevel angle — usually around 20 to 25 degrees — rather than inventing a new one. Hold the blade securely, or clamp it gently in a vice padded with cloth. Place your diamond file or whetstone flat against the bevel and push it from the pivot towards the tip. Use light, even strokes. Three to five passes on each blade is usually plenty for routine maintenance.

Do not sharpen the flat side of the blade. That side should stay flat, apart from one or two very light passes to remove the burr that forms on the reverse edge. Feel for the burr with your thumb — carefully — then wipe it away. Test the edge on a piece of paper or a soft green stem. It should slice cleanly, not crush. Anvil secateurs need the same treatment on the single bevel, but the anvil plate itself should never be sharpened; simply clean it and check that it is not grooved. If it is badly worn, replacement blades or a new pair may be the kindest choice.

Oiling the pivot and putting it back together

A dry pivot is the main reason secateurs become stiff and squeaky. Clean the pivot hole with your toothbrush, then add a single drop of light machine oil. Work the blades open and closed a few times so the oil spreads. Oil the spring lightly too, but do not drown the tool; excess oil attracts grit. Reassemble the parts in reverse order, dropping the spring and washers back into place.

Tighten the pivot nut until the blades close with a slight resistance. They should not rattle or feel loose, but they must not be so tight that you need two hands to open them. Wipe away any surplus oil with a clean rag. A thin film of camellia oil or light machine oil on the blades will help keep rust at bay, especially if you garden near the coast or in a damp valley. Avoid cooking oil, which can turn sticky and gum up the mechanism.

Storing secateurs for a dry, cosy retreat

Finally, store your secateurs somewhere dry. A damp greenhouse floor or an open shelf beside a leaking water butt is asking for rust. Hang them on a hook in a potting shed, summerhouse or insulated cabin, or keep them in a holster on a dry shelf. If you store them in a drawer, add a small silica gel sachet to absorb moisture. For long-term storage, coat the metal with oil and wrap the blades in waxed paper rather than plastic, which can trap condensation.

Make up a little tool-care tin with wire wool, a file, a cloth and a small oil bottle, and keep it in your cosy outdoor retreat. That way, a few minutes of maintenance becomes a pleasant ritual rather than a chore. Clean secateurs between plants, particularly after pruning roses or any shrub that might carry disease, and you will protect the hedgerows, herbaceous borders and wildlife-friendly planting that make a British garden so alive. Sharp, clean and dry: three simple habits that keep your secateurs ready for another season of gentle, generous pruning.