Plant guards and protectors: what they cost, and when they pay for themselves

Quick answer: A plant guard costs between about $0.69 and $3.65 a plant in New Zealand, depending on material, height, and whether stakes and a weed mat come with it. Our own kit is $2.30 excl GST, in packs of 125. On a 100-plant job that is $69 to $365 on top of the plants, and it only comes back to you where something is actually browsing, spraying or blasting the row.

Walk into a planting that went in five winters ago and worked, and you can't tell it ever needed a hand. The plants have met over the top, the ground underneath is dark and cool, and whatever was holding them up has gone back into the soil. Nobody who sees it knows what it cost.

Then there's the other version. Every guard standing to attention, straight rows, all the money spent, and inside each one a dead stick with kikuyu up to the rim.

That second one is nearly always a spending problem. The guard budget ate the release-spraying budget, and the weeds got there first.

What does a plant guard cost in New Zealand?

Between about 69 cents and $3.65 a plant. Here is what was published on 28 August 2026.

• Plant Guards NZ (Mariri, near Motueka). EcoShield Core, corrugated cardboard, from $0.69 excl GST. EcoShield Pro, wax-coated fibreboard, from $1.25. Their biodegradable weed mat, EcoShield Base, from $0.32. Minimum order 100, in multiples of 50.

• Greenmachine. 100 plastic tubes, 15cm wide by 50cm tall, with 100 bamboo stakes, $69.99 the lot. That's 70c a plant.

• Our own Plant Guard Kits $287.50 excl GST for 125, so $2.30 a plant. Each kit is a 125 x 300mm square plastic tube, a 220 x 220mm coir mat and four 500mm bamboo canes.

• Advance Landscape's FiberGuard. The 300mm guard on its own is $2.17 excl GST, or $2.06 over a thousand. Add two bamboo and it's $2.49. Add a coir or wool mat as well and the kit is $3.16. Step up to the 450mm and those numbers become $2.60, $2.98 and $3.56.

• Pukerau Nursery, up the road north of Gore. Combo Tree Protector, $3.25 plus GST, with four bamboo canes, a wool mulch mat, a 300mm plastic spray guard and a net sleeve over the top.

• The Plant Company. Biodegradable pulp guards, 350mm tall by 200mm wide with a 75cm bamboo stake, $5.00 each.

So the spread is more than five to one. A fair bit of that gap is the mat and the stakes rather than the sleeve itself.

What are you actually paying for?

Three separate things, sold as one item. Advance Landscape happen to sell theirs unbundled, so you can see exactly where the money sits: the bare 300mm sleeve is $2.17, add two bamboo canes and it's $2.49, add a coir mat as well and it's $3.16. Stakes 32 cents, mat 67 cents, sleeve the rest.

The sleeve. Cardboard, fibreboard, plastic or mesh. Two thirds of the price on a branded biodegradable kit, and near enough all of it on a bare plastic tube.

The mat. Coir, wool or hemp, sitting flat on the ground around the stem. Roughly 30 to 70 cents, and the piece most often left out of the cheap option. Skip it and weeds come up inside the guard, where you can't spray them and can't easily reach them, and they'll beat your plant to the light. Rabbit Watch make this exact point in their planting notes, and it matches what I see.

The stakes. Two or four bamboo canes, usually 400mm to 750mm. Canopy, the Forest Service's planting guidance, is blunt about this: untreated timber rots in the ground inside a year or two and the guard falls over with it. Bamboo is the cheap option and it's fine for a 12 to 24 month job. If you need the guard standing longer than that, you're buying treated timber, and the stakes start costing more than the sleeve.

Two more things that only show up later. Rigid plastic has to be pulled back off the site at the end, which is labour on a day when nothing else is getting done. Biodegradable guards don't, and that saved trip is a real part of the price comparison even though it never appears on the invoice.

How tall does the guard need to be?

Match the height to the animal. Work on roughly 30cm for rabbits, 45cm for hares and possums.

Height is also how the guard protects from weeds. It has to be taller than the weed you're trying to keep off the plant, or it does nothing.

When does a plant guard pay for itself?

Here's the maths, using the numbers we quote into riparian jobs. Plants at $3.50, planting at $4.50 including fitting the guard. So a plant is $8.00 in the ground before you've bought a guard at all.

Every plant you guard costs you the guard. Every plant the guard saves is worth $8.00 back. Divide one by the other and you get the survival lift the guard has to deliver before it breaks even.

• Guards at $0.69: it has to save about 9 plants in every 100.

• Guards at $2.30: about 29 in every 100.

• Guards at $3.56: about 45 in every 100.

Forty-five in a hundred is the figure to sit with. A full kit has to be rescuing nearly half the planting before it pays for itself, and no site with a bit of wind and the odd rabbit is failing at that rate.

The cheap cardboard guard is a different proposition. Nine plants in a hundred is a low bar, and almost any site with real browsing or spray pressure will clear it.

If you're a landscaper pricing this into a job, put the guard line on the quote on its own rather than burying it in the plant total. It's the one line the customer can choose to spend or not. Buying for your own place? Same decision, just without the paperwork.

One other point, and it's the least obvious. Guards make a planting look finished. Three hundred guards standing in a paddock feels like a completed job in a way that three hundred bare seedlings never does, and that feeling is what stops people going back in year two with the brushcutter. Weeds in the first three years kill more plants down here than every rabbit in Southland put together.

When is a guard a waste of money?

You do not generally need plant guards if you have larger grade plants (2.5L, PB18 etc), you've prepared the site well, you weed regularly, and you've kept grazing animals off. Take that one seriously. It puts the guard where it belongs, standing in for site work that decides survival on its own.

Common questions

Do I have to take the guards off, or can I leave them?

Cardboard and fibreboard guards are designed to break down in place, generally over 12 to 24 months, faster on wet and windy sites. Plastic has to come off, and the longer you leave it the more likely it is to be rubbing or ring-barking by the time you get there. Mesh sleeves are the worst for this because the stem grows through the mesh.

Are cardboard guards strong enough in a Southland winter?

The fibreboard ones are. They carry a moisture barrier and are built for wet ground, and the failures I've seen are staking failures rather than material failures. Plain corrugated cardboard on a wet, exposed site is a shorter proposition. If the site is rough, spend the money on stakes before you spend it on a fancier sleeve.

Can I reuse plastic guards on the next planting?

You can, and some volunteer groups do it well, but recovering them off established plants is slow work and some have to be cut off. Unless you have labour you're not paying for, the recovery usually costs more than the guard.

Will a guard stop frost damage?

A guard that reaches the ground and traps a bit of air does create a warmer pocket, and frost protection is one of the things they get sold on. Down here that's a minor benefit. Southland snap frosts rarely get past about -5°C, which browns off soft new growth and doesn't do much else. In the hard-frost country inland it matters more.

Do wasps really nest in cardboard guards?

Rabbit Watch have reported paper wasps mining the cardboard and building nests inside the guard, which becomes a problem when someone's releasing plants by hand on a hot day. It's occasional and regional rather than something to plan around, but it's a reason to look before you reach in.

A guard buys insurance against one specific risk, and you should be able to name the risk before you buy. Rabbits, hares, spray drift, wind, a brushcutter operator who can't see the plant. If you can't name it, that money does more good spent on a bigger grade or on getting back for the second year's release.

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