Choosing a digging tool
Read the ground first. A spade in clay and a fork in loose sand are both the wrong tool, and both feel like hard work rather than a mistake.
The soil decides the tool
A spade blade is designed to slice, so it works in soil that parts. In heavy clay it does not slice, it compresses, and the clay sticks to the blade and to itself. A fork's tines separate clay along its natural fracture lines instead, which is why a fork moves wet clay perhaps three times faster than a spade does.
Stony ground defeats both, because neither will penetrate past a stone. That is what a mattock is for: it swings and its weight breaks ground rather than being pushed into it.
- Loam and sand
- Spade. It slices cleanly and lifts a full load, which is exactly what these soils allow.
- Clay
- Fork. The tines split clay along its fracture lines and, unlike a blade, nothing sticks to them.
- Stony or compacted
- Mattock or bar. Swung weight breaks ground that no amount of pushing will enter.
- Roots
- A grafting spade or a root axe. A spade blade blunts on roots and then stops cutting anything.
Digging spade or border spade
A digging spade has a blade around 290mm by 190mm and is the general tool. A border spade is noticeably smaller, and that is not simply a cheaper version: a smaller blade means a smaller load, which means less strain per lift and easier work between established plants.
Anyone who finds a full size spade heavy going should try a border spade before concluding that digging is beyond them. Many people move more soil in an hour with the smaller tool.
- Digging spade
- The default. Full blade, full load, and best on open ground where the weight per lift is not the limit.
- Border spade
- Narrower and shorter. Less soil per lift, so more lifts per hour, and it fits between plants.
- Treaded blade
- A rolled top edge to stand on. Worth having if you wear soft shoes, and it does add weight.
Handle shape and length
A D or YD handle gives a positive grip for levering and lifting, which suits a spade. A long straight T handle or a plain shaft suits a shovel and a fork, where the motion is more of a scoop and a throw.
Length matters more than most people check. A shaft that is too short makes you bend, and bending under load is what hurts backs. Standing upright with the tool blade on the ground, the handle should reach roughly to your hip.
- D and YD handles
- Positive grip for levering, and the standard on a spade because a spade is levered as much as pushed.
- Long shafts
- More reach and leverage, less control. Right for a shovel and a trenching tool, wrong for close work.
- Check the height
- Handle to hip with the blade on the ground. Too short means bending, which is where back injuries come from.
- Ash beats fibreglass for repair
- Both are strong. A broken ash shaft can be replaced; most fibreglass handles cannot.
Digging without wrecking your back
The two rules are to keep the load close and to turn your feet rather than your spine. A twisting lift with a full spade at arm's length is the movement that causes most digging injuries, and it is entirely avoidable.
Use your foot on the blade to drive it in rather than your arms, and lever the load up on the shaft rather than lifting it dead. The tool is a lever, and using it as one is the difference between a morning's work and three days of recovery.
- Foot, not arms
- Step the blade in. Your body weight is far greater than your arm strength and costs you nothing.
- Lever, do not lift
- Pull back on the handle to break the load out. The shaft over the ground is a lever, so use it.
- Move your feet
- Never twist under load. Turn the whole body to throw, and the spine stays in line.
- Smaller loads
- Half a spade twice beats a full spade once, in both speed and in how you feel afterwards.
A clean blade is a sharp blade
Soil left on steel holds moisture, and moisture pits the blade. Pitted steel drags in the ground, which means more effort for the same hole. Scraping the blade clean after use is thirty seconds that measurably reduces how hard the tool is to use.
A spade also benefits from being sharpened, which surprises people. A file run along the leading edge at a shallow angle makes a real difference in root-filled soil and turf.
- Scrape and dry
- Soil holds water against the steel. Pitting follows, and a pitted blade drags in every cut afterwards.
- Sharpen the leading edge
- A few strokes of a file at a shallow angle. It cuts turf and roots noticeably more easily.
- Oil bare steel
- An oily rag before storage prevents the rust that a damp shed will otherwise create over winter.
- Store off the floor
- Hung up, blade off the concrete. A shed floor is the dampest place in it.
Frequently asked questions
- What is the difference between a spade and a shovel?
- A spade has a flat, roughly rectangular blade with a sharp straight edge, for cutting into ground and slicing turf. A shovel has a curved, usually pointed blade with raised sides, for scooping and moving loose material. A spade digs, a shovel moves what has been dug.
- Should I use a spade or a fork in clay soil?
- A fork, and the difference is large. A spade compresses wet clay rather than slicing it, and the clay then sticks to the blade. A fork's tines split clay along its natural fracture lines and nothing clings to them, so the same work takes a fraction of the effort.
- What is a border spade for?
- A smaller blade than a digging spade, around 230mm by 140mm, for working between established plants and for anyone who finds a full size spade heavy. The smaller load per lift means less strain, and many people move more soil per hour with one.
- What tool do I need to dig through roots?
- A grafting spade for slicing through them, or a root axe or mattock for chopping through anything thick. An ordinary spade blade will blunt on roots and then stop cutting soil properly either, so it is worth keeping a dedicated tool for root-filled ground.
- What is a mattock used for?
- Breaking hard, stony or compacted ground by swinging its weight rather than pushing a blade in. A cutter mattock has an axe blade for roots on one side; a pick mattock has a point for stone. Both do work no spade can start.
- Are stainless steel spades better?
- Soil releases from stainless more easily and it does not rust, which makes it pleasanter to use in clay. Carbon steel takes and holds a sharper edge and is usually cheaper for the same strength. Stainless is the better choice for wet heavy soil, carbon for general work.
- How do I dig a narrow trench by hand?
- A trenching spade or a drainage shovel, both of which have long narrow blades that cut a straight vertical side. A standard spade will not make a trench narrower than its own blade without collapsing the walls, and the extra width is all wasted digging.
- How do I avoid hurting my back when digging?
- Drive the blade in with your foot rather than your arms, lever the load out on the shaft instead of lifting it dead, keep the load close to your body, and turn your feet rather than twisting your spine to throw. Smaller loads more often also help considerably.