Best Tree Collars: 6 Trunk Guards Compared by Pest

The best tree collars for most young trees are loose cylinders of 1/4-inch galvanized hardware cloth, 24 to 36 inches tall, with the bottom buried a few inches in the soil. That is the material the UC IPM Pest Note on voles and Wisconsin Extension both point to for rodents. Solid plastic tubes are a better choice where deer browse the top of the seedling, and short spiral wraps or mower guards suit trees that only need protection from string trimmers.

This guide compares six types of tree collar and trunk guard by the pest or problem they stop. It gives the sizes extension services recommend, survival results from field trials, a cost-share price chart and a calculator that shows whether guards pay for themselves on your planting. It is written for orchard growers, farmers planting windbreaks and land managers in the US, Canada, the UK, Europe, Australia and New Zealand.

Tree collars compared at a glance

A tree collar, tree guard and trunk protector are names for the same idea: a barrier around the lower trunk of a young tree. The right one depends on what is damaging your trees. The table sums up the six main types. Each has its own section below.

Heights for hardware cloth and rabbit cylinders follow the extension sources cited below; the other heights are common product ranges, not tested values. Product sizes vary by maker, so check the label before you buy.

What damages young tree trunks

Trunk damage often kills young trees by girdling. Girdling means the bark is chewed or cut all the way round. The layer under the bark carries water and sugars, so once it is cut right round the stem, the tree above slowly starves. The UC IPM Pest Note on voles says girdling of trunks and roots can kill trees, and that partial girdling can delay fruiting, cut yield and turn leaves yellow.

Voles and mice. Voles chew bark from a few inches above the ground to a few inches below it. UC IPM describes their gnaw marks as about 1/8 inch wide and 3/8 inch long, in irregular patches. Under snow, the damage can reach a foot or more up the trunk and is often not seen until spring.

Rabbits and hares. Rabbits clip shoots and strip bark higher up than voles. The UC IPM Pest Note on rabbits says most rabbit damage is close to the ground, except where snow lets rabbits reach higher parts of the plant.

Deer. Deer eat leading shoots and buds and rub their antlers on stems in autumn. A low collar does not stop them. Tall tubes, mesh cages or fencing are needed.

Mowers and string trimmers. Machinery cuts bark in a moment, and repeated small wounds can girdle a tree over one or two seasons. This is common in orchards with grass alleys, in shelterbelts and around yard trees.

Winter sun and frost. On cold, sunny days the south and southwest side of thin bark can warm, then freeze fast after sunset. The bark splits. A light-coloured wrap or white latex paint reduces this.

1. Hardware cloth cylinders: best for voles and mice

Galvanized hardware cloth with a 1/4-inch mesh is the standard rodent guard. Wisconsin Extension (Dane County) calls 1/4-inch hardware cloth one of the best materials to protect plants, and notes it is sold in 24-inch and 36-inch heights. The same article explains that chicken wire has holes large enough for voles and mice to slip through.

How to fit it:

• Cut a strip that wraps round the trunk with a gap of an inch or two all round and an overlap at the seam. Fasten the seam with wire ties.
• Bury the bottom edge. UC IPM advises burying cylinders 4 to 6 inches below the soil surface so voles cannot dig under them.
• Or splay the bottom out flat and pin it down with sod staples, a method Wisconsin Extension describes, using a mallet if the ground is frozen.
• Brace the cylinder with a stake so it cannot be pushed against the trunk.
• In snowy areas, make it tall enough to stay above the snow.

Best for: orchards, nut trees and shelterbelts with vole or mouse pressure. Pros: long life, chew-proof, lets light and air in. Cons: labour to cut and fit; sharp edges; must be loosened as the trunk grows.

2. Solid tree tubes: best where deer browse

A solid plastic tube, often called a tree shelter, surrounds the whole seedling. It stops deer reaching the leading shoot until the tree grows out of the top. It also shields the stem from herbicide drift and rabbits.

Field trials show a clear effect where deer are common. In a study of northern red oak by Stange and Shea, published in Restoration Ecology, deer browsed 68.6% of unsheltered seedlings, and plastic shelters cut mortality from 34.6% to 3.2%. A two-year trial of live oak reported in the journal Land (2022) found 83% survival for seedlings in tube or mesh shelters and 68% for seedlings without them.

Shelters are not a fix on their own. A USDA Forest Service research paper on red oak in Pennsylvania (NE-679) found 82% survival in shelters when herbicide was used against competing weeds and 40% without herbicide. In short, tubes pay off where deer are a real threat and weeds are controlled.

Best for: woodland planting, riparian buffers and hedgerows with deer. Pros: full browse protection; easy to see trees in long grass. Cons: plastic waste unless collected; stems can be thin when tubes come off; voles can nest inside if the base is not sealed.

Chart

Seedling survival with and without shelters

Percent of planted oak seedlings alive at the end of each trial

3. Spiral plastic wraps: best for rabbits and winter sun

Spiral wraps are coils of white or clear plastic that you twist round the trunk. They expand as the tree grows. They stop rabbits nibbling bark, light trimmer contact and some winter sun damage because the white surface reflects heat.

They are easy to fit, but they do not stop voles at ground level unless the base is tight to the soil. Wraps left on all summer can hold moisture against the bark and hide insects. Many growers fit them in late autumn and take them off in spring.

Best for: yard trees and young fruit trees with rabbits and cold winters. Pros: cheap, quick, reusable for a few seasons. Cons: short; poor vole control; remove each spring.

4. Rigid mesh tubes: best for rabbits and hares

Rigid plastic or wire mesh tubes stand on a cane or stake. They let more light and air reach the stem than a solid tube. The UC IPM rabbit note suggests cylinders cut from 1-inch poultry netting, 18 to 20 inches tall, buried 2 to 3 inches and braced away from the trunk so rabbits cannot press against the mesh and bite through.

A 1-inch mesh keeps out rabbits but not voles. Where both are present, use 1/4-inch mesh at the base or add a short hardware cloth collar inside the tube.

Best for: farm woodlands, hedges and shelterbelts with rabbits or hares. Pros: good airflow; stems grow sturdier than in solid tubes. Cons: wide mesh lets small rodents in; less herbicide protection.

5. Mower and trimmer guards: best for lawns and orchard rows

Short, rigid collars made from plastic or rubber slip round the lowest few inches of trunk. They stop string trimmer lines and mower decks cutting bark. They do nothing against rodents or deer.

A mulch ring is the cheapest guard against machinery. If grass stops well short of the trunk, there is nothing to trim near the bark. Keep mulch a few inches back from the trunk itself so the bark stays dry and voles have less cover.

Best for: yard trees, orchards with mown alleys, parks. Pros: cheap and fast. Cons: no pest protection; can rub bark if tight.

6. Biodegradable sleeves: best for short-term protection

Sleeves made from card, plant fibres or plant-based plastics are designed to break down in the field. They suit planting schemes where nobody will return to collect plastic tubes. Their working life depends on the material, rainfall and sunlight, so check the maker’s stated life and compare it with how long your trees need protection.

If you want to avoid plastic on a planting site, biodegradable sleeves can help, but they will not stop voles or deer for as long as metal or rigid plastic.

Best for: large plantings where collection is costly. Pros: no plastic to remove. Cons: shorter life; weaker against rodents; usually higher unit price.

▶ Simple sustainable farming practices that protect soil and water, alongside lower-plastic planting. · 4:34

How tall should a tree collar be?

Height depends on the tallest animal you need to stop and on snow depth. Voles stay low, rabbits reach higher, and deer need full-height protection. The chart shows the heights given in the extension sources used in this guide.

Chart

Guard heights in extension advice

Inches above ground, by purpose

For voles alone, UC IPM uses barriers about 12 inches high with the base buried. Add the depth of your usual snow cover where rabbits are present, because they stand on the snow to feed. Wisconsin Extension prefers 36-inch or 48-inch mesh where snow can be deep (the 48-inch height is usually 1/2-inch mesh). For deer, the guard must reach above browse height, or you fence the whole block; check local extension advice for the height to use.

How to install tree collars step by step

1. Check the pest. Look for small gnaw marks and runways in grass (voles), clean angled cuts on shoots and round pellets (rabbits), or ragged torn shoots and antler rubs (deer).
2. Clear the base. Pull weeds and grass from a ring round the trunk. Weeds hide voles and compete for water.
3. Leave room to grow. Fit the guard loosely. Wisconsin Extension suggests cutting mesh a couple of inches wider than the trunk so the metal does not rub.
4. Seal the bottom. Bury the base or pin it flat to the ground.
5. Stake it. Use a stake or cane so wind and animals cannot push the guard over.
6. Check it. Inspect after storms, heavy snow and in spring. UC IPM warns that voles may hide inside a guard and feed there.
7. Remove or loosen it. Take guards off once the bark has thickened and the tree is out of reach of the pest, or widen them as the trunk grows.

Do tree guards pay for themselves?

Guards add cost per tree, so the question is whether the extra trees that survive cover it. US cost-share rates give one view of the extra cost. The USDA NRCS Pennsylvania payment schedule for fiscal year 2026 pays $3.28 per foot for a one-row windbreak planted with protection and $1.45 per foot without it. These are cost-share payment rates, not shop prices, but in that schedule the rate with protection is more than twice the rate without it.

Chart

Windbreak cost-share rates with and without protection

US dollars per foot of row, NRCS practice 380, Pennsylvania, fiscal year 2026

Use the calculator to test your own numbers. Enter the cost of a planted tree, the cost of a fitted guard and the survival you expect with and without guards. The result shows the cost of each surviving tree in both cases.

Try the numbers for your own farm below.

Where tree collars fit on a farm

Orchards. Apple, pear, cherry and nut orchards lose young trees to voles in grass alleys. Hardware cloth collars and a clean weed strip are the usual pair.

Windbreaks and shelterbelts. Long rows of young trees on open land face rabbits, hares and machinery. The Tasmanian Government’s Private Forests guide to farm shelter explains how shelterbelts reduce wind speed and can raise farm output, which only happens if the young trees survive. Meat & Livestock Australia’s factsheet on trees on farms lists better livestock survival in cold weather among the benefits.

Riparian buffers and woodland planting. Deer pressure is often high near streams and woods. The NRCS payment schedule includes a riparian buffer practice planted with tree shelters, which reflects how common shelters are in these plantings.

Agroforestry and silvopasture. Where livestock graze among young trees, guards must be strong enough to withstand rubbing. Heavy mesh cages on posts are used rather than light tubes.

▶ How satellite NDVI maps show crop stress across a large farm before it is visible on the ground. · 4:09

Checking young trees across large plantings

On a few hundred trees you can walk the rows. On large orchards, plantations and windbreaks it is harder to spot the patches where trees are failing. Satellite crop health maps can show blocks where canopy cover is weaker than the rest, so you know where to walk first and check guards, weeds and pests. Farmonaut offers this kind of satellite monitoring for farms and plantations on web, Android and iOS.

Related pages on our site: large-scale farm admin app, carbon footprinting, product traceability, crop loan and insurance verification, satellite and weather API docs, open the app.

▶ Satellite and AI tree detection for counting and mapping trees across a plantation. · 4:05

Common mistakes with tree collars

• Using chicken wire for voles. The holes are too big. Use 1/4-inch mesh.
• Leaving a gap at the base. Voles tunnel under guards that sit on the surface.
• Fitting guards too tight. They cut into the bark as the trunk grows.
• Forgetting snow depth. Rabbits feed from the top of the snow, above short guards.
• Leaving wraps on all year. Damp bark under plastic can rot or hide pests.
• Never removing tubes. Old plastic splits, blows away and adds litter.
• Skipping weed control. Shelters alone gave poor survival in the USDA red oak trial when weeds were left.

Safety and local rules

If you combine guards with rodenticides, repellents or herbicides, check the label and local rules, and get professional advice where needed. Some rodent and rabbit control methods are restricted in parts of the US, Canada, the UK, the EU, Australia and New Zealand. Planting grants and cost-share schemes often set their own rules for guard type and removal, so read your scheme’s terms before you buy.

How we checked the facts

Sizes and fitting advice come from the UC IPM Pest Notes on voles and rabbits and from Wisconsin Extension (Dane County). Survival figures come from published field trials and a USDA Forest Service research paper, each described for the species and site it covered. Cost figures are NRCS cost-share payment rates for Pennsylvania, fiscal year 2026, not retail prices. Product heights in the comparison table are common ranges, not tested values. Each source is listed at the end of the article.

FAQ

What is the best material for a tree collar?

For rodents, galvanized hardware cloth with a 1/4-inch mesh, fitted loosely and buried at the base. For deer, a solid tube or tall mesh cage. For trimmers only, a short rigid plastic guard or a mulch ring.

How tall should a tree guard be for rabbits?

UC IPM suggests cylinders 18 to 20 inches tall in mild areas. In snowy regions, add your usual snow depth, since rabbits feed from the snow surface. Wisconsin Extension prefers 36-inch or 48-inch mesh where snow is deep.

Do tree shelters improve survival?

Where deer browse, yes. Field trials have reported lower deaths for oak seedlings in shelters. Where deer are absent or weeds are not controlled, the gain can be small.

When should I remove tree collars?

Remove or loosen guards when the trunk presses against them, and remove spiral wraps each spring. Take shelters off once the tree is above browse height and the bark has thickened.

Is chicken wire good enough for a tree guard?

Against rabbits, 1-inch poultry netting works if braced away from the trunk. Against voles and mice, it is not, because the holes are large enough for them to get through.