The Complete Guide to Cleaning and Maintaining Your Pruning Tools
Premium pruning shears can last 20 years with proper care.

They can also rust into uselessness in a single season if you store them wrong. The difference isn't the brand — it's the maintenance routine.
This guide covers everything: how to clean sap and debris off blades, how to sharpen edges, how to sanitize tools to prevent disease spread, and how to protect them during storage. Whether you've had your Felcos for five years or just unboxed a new pair, this is the routine that keeps them performing like new.
Why Tool Maintenance Matters Beyond Sharpness
Most gardeners think tool maintenance is about keeping blades sharp. That's part of it. But the real reason to maintain your tools is disease prevention.
Every cut you make deposits plant sap, fungal spores, and bacteria on your blades. Tree sap creates a sticky matrix that protects pathogens from surface cleaning. Tools that are sap-encrusted and never sanitized are essentially disease-spreading machines — moving Fusarium, Fire blight, and bacterial canker from plant to plant with every cut.
A proper maintenance routine addresses three things: cleanliness (removing debris and sap), sanitation (killing pathogens), and protection (preventing rust and corrosion).
What You'll Need
- Clean cloths or paper towels
- A sharpening stone or diamond file
- A professional-grade sanitizing spray (see below)
- Light oil for pivot points (food-grade mineral oil works well)
- Optional: a wooden handle conditioning oil for wood-handled tools
Step-by-Step Tool Maintenance Routine
Step 1: Remove Debris After Each Use
After every pruning session, wipe blades clean while sap is still fresh. Dried sap is significantly harder to remove and builds up over time, dulling cutting edges and harboring pathogens.
For heavy sap buildup, apply a sap-dissolving cleaner and let it sit for 10-15 seconds before wiping. Look for a plant-based detergent formulation that actually breaks down the resin chemistry of tree sap rather than just moving it around.
Step 2: Sanitize — Between Plants and After Each Session
This is the step most home gardeners skip — and the one that matters most for plant health. Sanitizing is different from cleaning. Cleaning removes visible debris. Sanitizing kills the invisible pathogens that cleaning doesn't touch.
The professional standard is to sanitize between plants when disease is present, and at minimum before storing tools after each use. For rose deadheading, orchard pruning, or working on any plants with known disease pressure, sanitize between every cut.
Avoid bleach solutions for regular sanitization — bleach accelerates corrosion on high-carbon steel and degrades rapidly in sunlight, requiring fresh mixing every two hours. An organic-certified, tool-safe sanitizer like RETAIN provides the same pathogen kill (lab-tested equivalent to 10% bleach against Fusarium oxysporum) without the corrosion, skin irritation, or inconvenience.
Step 3: Lubricate Pivot Points
After cleaning, apply a light oil to the pivot mechanism of bypass pruners and loppers. This reduces friction, prevents sticking, and extends the life of the spring mechanism. Food-grade mineral oil is ideal — it doesn't go rancid like plant-based oils and won't harm plants if there's minor contact.
Open and close the pruners several times after oiling to work the lubricant into the mechanism.
Step 4: Sharpen When Needed
A sharp blade makes clean cuts that heal faster and give pathogens less opportunity to enter. Use a diamond sharpening file or whetstone at the original factory bevel angle (usually around 25-30 degrees for bypass pruners). Sharpen only the beveled edge, not the flat back.
For most home gardeners, sharpening once per season is sufficient. Heavy-use tools or those that contact hard wood may need more frequent attention.
Step 5: Protect Before Storage
Before putting tools away — at the end of a session or especially for off-season storage — apply a light coat of protective oil or an all-in-one sanitizer with built-in rust prevention. This creates a barrier between metal and moisture, preventing the oxidation that causes rust.
Tools stored without protection in humid conditions (sheds, garages) are particularly vulnerable. A single application of rust-inhibiting spray before seasonal storage can be the difference between tools that work next spring and tools that don't.
A Note on Different Tool Types
Bypass Pruners
The most versatile and commonly used pruning tool. Pay attention to the pivot bolt — keep it snug but not so tight the blades bind. The spring should be replaced when it no longer returns blades to the open position reliably.
Loppers
Loppers take more stress than hand pruners. Check pivot bolts regularly and lubricate generously. The longer handles amplify any friction in the mechanism, so keeping pivots well-oiled matters more than with smaller tools.
Pruning Saws
Blades are replaceable on most quality pruning saws — replace rather than sharpen when teeth become dull. Sanitize saw blades between trees, as they create the deepest wounds and the greatest opportunity for pathogen entry.
Grafting Knives
Grafting involves intentionally creating open wounds on valuable plants. Sanitization between every graft is non-negotiable. Use a sanitizer that works immediately and won't leave residue that could interfere with the graft union.
The One-Spray Solution: RETAIN
RETAIN Spray was formulated to handle steps 2, 3, and 5 in a single application. The plant-based detergent blend breaks down tree sap, the 1% oregano oil formula kills pathogens (lab-tested equivalent to bleach against Fusarium), food-grade mineral oil lubricates pivot points, and a proprietary corrosion inhibitor protects blades from rust.
With the use of RETAIN sprayed on the tool and allowed to stand for about 30 seconds and scrubbing dirt with a plastic bristle brush, not the commonly recommended wire brush that can damage blade cutting edges.ts have replaced bleach buckets with RETAIN — not because it's a shortcut, but because consistency is what actually prevents disease, and RETAIN is easy enough to use every single time.
RETAIN is available in 2oz (pocket), 4oz (standard), and 32oz (professional) sizes. Order on Amazon or Walmart with fast shipping.
Quick Reference: Tool Maintenance Schedule
After each use: Wipe clean, sanitize blades, lubricate pivots if sticky.
Weekly (heavy use): Full clean, sanitize, sharpen if needed.
End of season: Deep clean, sharpen, apply protective oil or sanitizer, store in dry location.
Start of season: Sanitize before first use — dormant pathogens can survive on stored tools.
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