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Gardena 420-20

A 40 cm drop spreader head with a levelling bar — the narrowest and most accurate pattern on this shelf.

Gardena combisystem drop spreader head without handle

Gardena 420-20

A 40 cm drop spreader head with a levelling bar — the narrowest and most accurate pattern on this shelf.

Type
Drop spreader head for a modular handle system
Hopper volume
Not published
Working width
40 cm — the narrowest here, and laid down rather than thrown
Wheels
Not published
Rate setting
Integrated levelling bar for an even pattern
Material
Pushed by hand; handle NOT included, sold separately · Drop spreader head for a modular handle system
Amazon reference
B0001E3QME (one reference across 6 Amazon marketplaces)
EAN
4078500042000
  • A drop pattern, which lays exactly its own width and nothing outside it
  • The cheapest item on this shelf, if you already own the handles
  • The handle is a separate purchase, which changes the real price

Best for: Small lawns, and anywhere fertiliser must not land on a bed, a path or a pond

Check price on Amazon

Specifications

Type
Drop spreader head for a modular handle system
Hopper volume
Not published
Working width
40 cm — the narrowest here, and laid down rather than thrown
Wheels
Not published
Rate setting
Integrated levelling bar for an even pattern
Material
Pushed by hand; handle NOT included, sold separately · Drop spreader head for a modular handle system
Amazon reference
B0001E3QME (one reference across 6 Amazon marketplaces)
EAN
4078500042000

The narrowest spreader here, and that is the point

40 cm.

The rest of this shelf goes to 41 cm, 2 m per side, 2.5 to 3.5 m and up to 5 m.

A twelvefold range, on the number that looks like it should be maximised.

Drop versus broadcast, which decides everything

A drop spreader — this, and one other on this shelf — has a slot in the bottom of the hopper. Material falls straight down between the wheels. It treats exactly the width of the machine, at the same rate across it, and puts nothing outside that line.

A broadcast spreader — three on this shelf — throws material off a spinning disc or an oscillating plate. It covers two to five metres a pass, and the cone it throws is denser near the middle and thinner at the edges.

That difference is the reason lawns end up striped.

Where the stripes come from

A broadcast spreader has to be overlapped, and by roughly the right amount.

Too little overlap and there is a pale line between passes where neither cone reached full rate. Too much and there is a dark line where two cones stacked — and with nitrogen, a double dose scorches.

Neither shows up on the day. Both appear about ten days later as a lawn with stripes in it, and by then there is nothing to do but wait.

A drop spreader cannot make that mistake in the same way. Its edge is a hard edge: you run the next pass wheel-track to wheel-track and the rate is the same everywhere. Its failure is a missed strip if you leave a gap, which is visible and fixable.

The levelling bar

Named in the listing as giving an even pattern across the 40 cm.

On a drop spreader that bar is the whole mechanism. Granules flow unevenly out of a wide slot — faster where the hopper is deeper, slower at the ends — and a bar that shears the flow to a constant depth is what makes the 40 cm even rather than merely 40 cm wide.

And where 40 cm is worth the extra passes

A narrow, hard-edged pattern is not a compromise in three situations, and they are common ones.

Next to a bed. Lawn fertiliser landing on a border is a nitrogen dose on plants that did not need it, and a broadcast cone reaching two metres will put it there.

Next to a path or a drive. Iron-containing lawn feeds stain concrete and paving permanently, and sweeping is not enough once it has rained.

Next to water. Fertiliser in a pond feeds algae, and a broadcast spreader run along a bank puts it in.

For an open lawn of any size, 40 cm is a great many passes and one of the broadcast spreaders here is the better tool.

The handle, which is not included

The delivery line is explicit: one spreader head; the handle is not supplied and is available separately.

That is the same arrangement as the aerator head on this site’s aerator shelf, and the same trade applies. Bought into the range, the tenth tool costs the price of a head and stores in a drawer. Bought cold, this is two purchases and the handle is not the cheap half.

The listing does name the compensation: it fits every handle in the range, including the longer back-sparing ones — and a spreader is pushed slowly, bent slightly forward, which is exactly the job a long handle helps with.

What goes unpublished

No hopper capacity.

Every other spreader on this shelf publishes one, and they run from 3.3 litres to 45. On a 40 cm drop spreader, capacity is what decides how many times you walk back to the bag — and a narrow machine covers ground slowly, so it empties slowly too.

No metering scale. The levelling bar is named; how it is set for a 20 g/m² seed rate against a 35 g/m² fertiliser rate is not described. One spreader on this shelf maps its numbered settings to material types, and it is the only one.

Availability

Around 23 €, read at the German Amazon store on the day of the survey.

Beyond the euro zone, the American and British Amazon stores price it in their own currencies, which the spread above sets aside.

More than 1.6× the cheapest country at the French, Italian and Spanish Amazon stores; a gap of that size normally means forwarded stock rather than a seller on the ground, so the spread above leaves it out.

Taken from Keepa on the day this page was last revised; stock and prices move without notice.

Prices quoted in this text were read on 26 September 2026. The live price is at the top of the page.

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