The Complete Guide to Garden Netting, Fleece, and Plant Protection

Why Plant Protection Matters

Gardeners invest time, money, and care into growing plants, vegetables, and fruit — then lose the results to frost, insects, birds, or wind in a single night or a single week. Plant protection products exist to close that gap between effort and harvest.

A sheet of horticultural fleece draped over tender seedlings before a late frost can save an entire season's planting. A length of fine insect mesh secured over a row of carrots can eliminate carrot fly damage without a drop of pesticide. A simple cloche placed over early lettuce can bring the harvest forward by weeks.

These are not expensive or complicated products. They are among the most cost-effective investments in the garden — often paying for themselves many times over in a single season through the crops they save. But choosing the right product for the right problem matters enormously, because netting that is too coarse lets pests through, fleece that is too heavy blocks the light your plants need, and loose netting that is not properly secured can injure the wildlife you are trying to live alongside.

This guide helps you choose well.

The Golden Rule: Match the Cover to the Problem

Before buying anything, identify what you are protecting against:

Frost and cold? You need horticultural fleece (or a cloche or cold frame).

Insects — carrot fly, cabbage root fly, aphids, flea beetles? You need insect mesh, and the mesh size depends on the specific pest.

Birds eating your fruit? You need bird netting — but please read the wildlife safety section first.

Cabbage white butterflies laying eggs on your brassicas? You need butterfly netting or insect mesh.

Wind damage? You need windbreak netting.

Excessive sun on tender crops? You need shade netting.

Every product in this guide does a specific job. Using the wrong one — bird netting against carrot fly, for example, or lightweight fleece against a hard frost — achieves nothing except disappointment. Start with the problem, then find the product.

Horticultural Fleece

What Fleece Does

Horticultural fleece is a lightweight, non-woven polypropylene fabric that traps a layer of still air around and above plants, insulating them against cold. It allows air, light, and rain to pass through (unlike solid polythene) while raising the temperature around the covered plants by a few critical degrees — often enough to prevent frost damage.

Beyond frost protection, fleece also provides modest shelter from wind, hail, and some pest species. It warms the soil beneath it, which can bring forward germination and growth by one to two weeks in spring — a genuine advantage for impatient growers and a valuable extension of the growing season.

Fleece Weights and What They Mean

Fleece is measured in grams per square metre (gsm). The weight determines its insulating ability, durability, and light transmission — and these three properties are in tension with each other. Heavier fleece insulates more but transmits less light and traps more moisture.

17 gsm (lightweight): Protects to just below freezing (approximately -1°C to -2°C). Allows the most light through. Ideal for spring and autumn use — warming soil, bringing seedlings along, and protecting against light frost. Less durable than heavier grades and more likely to tear. Good for short-term use over active growing crops in the lighter seasons.

30–35 gsm (heavy duty): The most common grade. Protects down to approximately -3°C to -4°C. A good balance of insulation, light transmission, and durability. Suitable for most frost protection tasks in temperate climates. This is the grade to keep in your shed as a default.

45–50 gsm (extra heavy): Protects down to approximately -6°C to -8°C. Used for wrapping vulnerable plants through winter, protecting containerised plants, and providing emergency cover in severe cold snaps. Transmits less light (approximately 60%), so prolonged use over growing crops in the darkest months can slow growth. Best used as temporary protection during the worst weather rather than as a permanent cover.

The practical advice: For most garden situations, 30 gsm fleece is the right choice. It is durable enough to reuse across several seasons, insulating enough for the majority of frost events, and light enough to use without elaborate support. Keep a roll of 50 gsm for emergencies — severe frost warnings, protecting a particular treasure, or wrapping container plants in exposed positions.

How to Use Fleece

Draped directly over plants: The simplest method. Lay the fleece over the plants, allowing enough slack for growth, and secure the edges with pegs, stones, soil, or boards. This works well for low-growing crops and seedlings. The fleece can rest directly on foliage for short periods, but prolonged contact can wick frost onto leaves — an air gap, created by simple hoops or supports, is better for longer-term use.

Over hoops as a tunnel: Bend wire or plastic hoops over a bed at intervals of about 80–100 cm (30–40 in), drape the fleece over the hoops, and secure the edges. This creates a protective tunnel with an air gap above the plants, provides room for growth, and allows easy access for weeding, watering, and harvesting by lifting one side.

As greenhouse insulation: Fix heavy fleece to the inside of a greenhouse or cold frame with clips or tape to create an insulating lining — a simple "double glazing" effect that significantly reduces heat loss on cold nights.

As individual plant wraps: Wrap fleece around tender shrubs, tree ferns, or potted plants during winter. Secure with string or fleece-specific ties. Fleece jackets (pre-shaped bags with drawstrings) are available for individual plants and container protection.

The Trade-Offs of Fleece

Fleece is not perfect. It blocks some light at a time when light levels may already be low. It traps humidity, which can encourage fungal diseases (particularly botrytis and downy mildew) if left on for extended periods without ventilation. It creates a sheltered environment that slugs and snails appreciate as much as your plants do.

Ventilate regularly. On bright, dry days, lift or peel back the fleece to let air circulate and moisture escape. Re-cover before dusk.

Check for pests underneath. Slugs, snails, and aphids can thrive in the warm, sheltered conditions beneath fleece. Inspect regularly and deal with problems early.

Remove when the risk has passed. Fleece is a response to a specific threat (frost, cold, wind). Once that threat has passed, the plants will grow better without it. Do not leave fleece on indefinitely out of habit.

Insect Mesh Netting

Insect mesh is a finely woven fabric — typically made from high-density polyethylene (HDPE) — that physically prevents insects from reaching your crops. It is one of the most effective and environmentally responsible pest control methods available: no chemicals, no residues, no impact on beneficial organisms that are not trying to reach the protected plants.

Why Mesh Size Matters

Different pests are different sizes. A mesh that stops a cabbage white butterfly will not stop a flea beetle, and a mesh that stops a flea beetle will not stop a thrip. Buying the wrong mesh size is the most common reason insect mesh fails to protect crops.

Standard Mesh (1.3–1.4 mm)

Excludes: Cabbage root fly, carrot fly, onion fly, bean seed fly, cabbage white butterflies and moths, most larger flying insects. Also excludes birds and mammals.

Does not reliably exclude: Aphids, flea beetles, allium leaf miner, leek moth, whitefly, thrips.

Best for: Most root-fly protection (carrots, parsnips, onions), brassica protection against butterflies and moths, and general-purpose crop cover where the main threats are larger insects and birds.

This is the most commonly sold grade and the right choice for most vegetable garden situations.

Fine Mesh (0.8 mm)

Excludes: Everything the standard mesh excludes, plus flea beetles, cabbage whitefly, allium leaf miner, leek moth, and most aphid species.

Best for: Brassica crops where whitefly and flea beetle are serious problems. Allium crops (leeks, onions, garlic) where allium leaf miner is present. Any situation where standard mesh has proven insufficient.

Ultra-Fine Mesh (0.3–0.6 mm)

Excludes: Virtually all insect pests, including thrips and the smallest flying insects.

The trade-off: Ultra-fine mesh restricts airflow more than coarser grades. In hot weather, the reduced ventilation can cause heat stress and increased humidity beneath the cover. Use in well-ventilated situations and monitor conditions.

Best for: High-value crops where even small insect damage is unacceptable. Situations where thrips are a persistent problem.

Using Insect Mesh Effectively

Cover immediately after planting or sowing. The mesh must be in place before the pest arrives. Covering carrots after the carrot fly has already laid eggs achieves nothing — the larvae are already in the soil.

Seal the edges completely. Bury the edges in soil, weigh them down with boards, or use ground pegs to create a continuous barrier. A gap at the edge is an open door. Ground-dwelling pests like carrot fly are low fliers — they find gaps at ground level with ease.

Allow slack for growth. The mesh needs room for the plants to expand beneath it. Too tight and the plants push against the mesh, creating contact points where insects can lay eggs through the fabric.

Remove for pollination if necessary. Crops that require pollination by bees and other insects (strawberries, courgettes, runner beans) must have the mesh removed or lifted during flowering. Root crops (carrots, parsnips) and leaf crops (brassicas, salads) do not require insect pollination and can remain covered from planting to harvest.

Quality matters. UV-stabilised HDPE mesh lasts five to ten seasons with careful handling. Cheap mesh deteriorates in sunlight within a season or two, develops holes, and fails. Look for terms like "UV stabilised," "HDPE," and "extruded" — indicators that the mesh is manufactured for outdoor longevity.

Bird Netting

Bird netting is the traditional solution for protecting soft fruit (strawberries, raspberries, blueberries, currants, cherries) from birds. Mesh sizes for bird netting are typically 15–20 mm — large enough to allow insects, air, and light through freely, small enough to prevent birds from accessing the fruit.

Fruit cages — permanent or semi-permanent frames covered in bird netting — are the most effective approach for dedicated fruit-growing areas. A well-constructed fruit cage protects the entire crop reliably, allows easy human access for picking and maintenance, and can last for many seasons. Look for knotted or extruded polypropylene netting that is UV-stabilised for longevity.

Please read the wildlife safety section below before purchasing or installing bird netting.

Butterfly Netting

Butterfly netting has a mesh aperture of approximately 7 mm — too small for butterflies to pass through, but large enough for good airflow and light. It is designed specifically to prevent cabbage white butterflies from laying eggs on brassica crops (cabbage, broccoli, cauliflower, kale, Brussels sprouts), which in turn prevents caterpillar damage.

Butterfly netting is a targeted solution — it will not stop smaller insects like aphids or carrot fly. If your brassicas suffer from whitefly or flea beetle in addition to caterpillars, use insect mesh (standard or fine) instead.

Netting and Wildlife Safety

This is important. Please take it seriously.

Improperly installed garden netting kills wildlife. Birds, hedgehogs, amphibians, and small mammals become entangled in loose netting, particularly netting with larger mesh sizes. An entangled bird can die from exhaustion, injury, or exposure within hours. Hedgehogs wrapped in netting can suffer fatal injuries as they struggle to free themselves.

How to use netting responsibly:

Keep netting taut. Loose, sagging netting is the primary cause of entanglement. Support netting on a frame (fruit cage, hoops, canes) rather than draping it loosely over plants where it can sag, pool, and trap animals.

Secure the edges to the ground. Bury the base of the netting in soil, pin it to a board half-sunk in the ground, or use ground pegs to create a sealed perimeter. This prevents animals from crawling underneath and becoming trapped inside.

Check netting regularly. Walk the perimeter of your netted area daily. Look for trapped birds, hedgehogs, or other animals and release them immediately.

Remove netting when not needed. If the crop has been harvested, take the netting down. Netting left up indefinitely when it is no longer serving a purpose is a hazard.

Use fine mesh where possible. Very fine insect mesh and horticultural fleece are significantly safer for wildlife than larger-mesh bird netting, because the mesh is too fine for animals to become entangled in. If you can achieve your protection goal with fine mesh instead of coarse netting, choose the fine mesh.

Consider the alternatives. For fruit trees, individual fruit protection bags (mesh bags placed over individual fruit clusters) protect the fruit without draping netting over entire trees. For soft fruit bushes, a properly constructed fruit cage with taut, well-maintained netting and a door or flap for access is safer than loosely draped netting.

Cloches

A cloche is a small, portable cover placed directly over individual plants or short rows to provide shelter, warmth, and protection.

Glass and Rigid Plastic Cloches

The traditional bell cloche — a glass dome placed over a single plant — is the original plant protector. Modern equivalents include rigid polycarbonate and acrylic cloches in various shapes (dome, lantern, tent, barn). These provide excellent frost protection by trapping heat, allow light through for photosynthesis, and create a warm microclimate around individual plants.

Strengths: Good insulation. Clear material allows light through. Reusable for many seasons. Attractive in the garden.

Limitations: Cover only small areas. Glass is fragile and heavy. Rigid plastic cloches can overheat in direct sun — ventilation is essential on warm days. More expensive per area covered than fleece or mesh.

Best for: Individual tender plants. Early-season protection for small plantings. Hardening off transplants. A few valuable specimens rather than entire beds.

Tunnel Cloches and Hoops

Metal or plastic hoops pushed into the ground over a bed, with fleece, mesh, or polythene draped over them to create a continuous low tunnel. The most practical and cost-effective protection method for row crops and raised beds.

Strengths: Cover an entire row or bed. Easy to access (lift one side for weeding and harvesting). Adaptable — change the covering material depending on the season and threat (fleece for frost, mesh for insects, polythene for warming soil).

Hoops spacing: Place hoops approximately 80–100 cm (30–40 in) apart for stability. Use clips or pegs to secure the covering material to the hoops.

Best for: Vegetable beds and allotments. Season extension in spring and autumn. Long-term insect protection.

Pop-Up Net Cloches and Cages

Self-supporting mesh or fleece covers that spring into shape and sit over a bed or plant without separate hoops or frames. Available in various sizes, from small individual plant covers to full-bed enclosures.

Strengths: Quick to deploy. No separate support structure needed. Easy to move. Compact to store.

Limitations: Fixed sizes — may not perfectly match your beds. Less sturdy in wind than hooped tunnels. The mesh grade is fixed at manufacture — you cannot swap the covering material as you can with a hoop system.

Cold Frames

A cold frame is a bottomless box with a transparent lid (the "light") that sits on the ground or on top of a raised bed. The solid sides shelter plants from wind; the transparent lid lets sunlight in while trapping heat. The lid opens for ventilation and access.

Strengths: Excellent frost protection — the enclosed airspace retains heat effectively. Ideal for hardening off seedlings raised indoors. Extends the growing season significantly at both ends (earlier planting in spring, later harvest in autumn). Semi-permanent and reusable for many seasons.

Ventilation is critical. On sunny days, a closed cold frame can overheat rapidly. Open the lid progressively as the temperature rises — a crack in the morning, wider at midday, closed again before dusk. Automatic vent openers (wax-cylinder mechanisms that expand with heat and open the lid without human intervention) are a worthwhile investment for anyone who is away during the day.

Best for: Seedling hardening. Overwintering slightly tender plants. Growing winter salads and herbs. A permanent year-round asset in the productive garden.

Grow Tunnels and Mini Polytunnels

Walk-in or walk-along tunnels covered in polythene or reinforced film. Mini polytunnels (typically 1–2 m / 3–6 ft tall and wide) provide an enclosed growing environment over an entire bed, offering substantial frost protection, wind shelter, and season extension.

The difference from cloches: Scale. A mini polytunnel covers a full bed with standing room (or at least kneeling room) for the gardener. The enclosed volume of air retains heat better than a low tunnel.

Ventilation: Essential. Polytunnels overheat quickly in sun. Ensure your tunnel has openable ends or side panels. See our Hydroponics and Indoor Growing Guide for controlled environment growing.

Windbreak Netting

Woven or knitted mesh (typically 40–60% wind reduction) designed to reduce wind speed across an exposed area. Unlike a solid barrier (a wall or fence), which creates turbulence on the leeward side, windbreak netting filters the wind, reducing its force while maintaining airflow.

Best for: Exposed gardens, allotments, and coastal sites. Protecting young plants from wind rock (the loosening of roots by constant wind movement). Sheltering tender vegetables in the early season.

Installation: Windbreak netting is most effective when supported vertically on posts at the upwind side of the area to be protected. It provides effective shelter for a distance of approximately six to ten times its height on the leeward side.

Shade Netting

Woven fabric (usually HDPE) that reduces the intensity of direct sunlight reaching plants beneath it. Available in various shade percentages (typically 30–70% shade). Used to protect shade-loving plants from scorching, reduce heat stress on crops during hot periods, and protect newly planted or transplanted specimens from direct sun while they establish.

Plant Jackets and Individual Wraps

Pre-shaped fleece bags, sometimes with zips or drawstring closures, designed to slip over individual plants — particularly tender shrubs, tree ferns, banana plants, and containerised specimens that need winter protection.

Strengths: Quick to apply and remove. Fitted shape stays in place better than loose fleece in wind. Available in sizes from small shrub covers to tall tree wraps.

Best for: Protecting individual borderline-hardy plants over winter. Container plants in exposed positions. Quick response to unexpected frost warnings.

Support Structures: Hoops, Pegs, and Frames

The covering material is only as effective as the structure that supports it. Fleece, mesh, and netting all perform better when supported above the plants on a frame rather than draped directly onto foliage.

Wire hoops: Galvanised wire hoops in various widths, pushed into the soil at intervals. Simple, inexpensive, reusable. The standard choice for tunnel cloches.

Plastic hoops: Lighter and less likely to damage covering material than wire. Flexible but less rigid — may need closer spacing in wind.

Ground pegs: Secure the edges of fleece and mesh to the ground. Essential for preventing wind from lifting the cover and creating gaps that pests exploit.

Clips: Attach covering material to hoops, frames, and greenhouse structures. Prevent the cover from sliding or flapping.

Fruit cage frames: Metal or timber permanent structures for bird netting. The most effective long-term solution for dedicated fruit-growing areas.

Seasonal Calendar: What to Use When

Late winter to early spring: Fleece (30 gsm) over beds to warm the soil before planting. Fleece over early-sown crops for frost protection. Cold frames for hardening off indoor-raised seedlings.

Mid to late spring: Insect mesh over carrots, parsnips, and brassicas from the moment of sowing or transplanting. Fleece on standby for late frost warnings. Tunnel cloches over tender transplants (courgettes, beans, squash) until established.

Summer: Bird netting over soft fruit as it ripens. Insect mesh maintained over vulnerable crops (remove or lift for pollination-dependent crops during flowering). Shade netting over heat-sensitive plants during prolonged hot spells.

Autumn: Fleece over late crops to extend the growing season. Cold frames and cloches to keep winter salads productive. Fleece jackets on tender perennials before the first hard frost.

Winter: Fleece wraps on vulnerable shrubs and container plants. Cold frames for overwintering seedlings and herbs. Greenhouse lining with fleece for insulation.

Common Mistakes and How to Avoid Them

Using the Wrong Mesh Size

Bird netting will not stop carrot fly. Standard insect mesh will not stop flea beetles. Identify your pest, check the mesh size required, and buy accordingly.

Covering After the Pest Has Arrived

Insect mesh must be in place before the pest reaches the crop. Covering carrots after carrot fly has already laid eggs protects the larvae, not the plants.

Leaving Fleece On Too Long

Fleece is a temporary response to a specific threat. Left on indefinitely, it reduces light, traps moisture, and encourages slugs and fungal disease. Remove or vent as soon as conditions improve.

Loose Netting

Loose, sagging netting is a wildlife hazard and a pest entry point. Keep netting taut on a frame, secure the edges to the ground, and check regularly.

Not Ventilating Cold Frames and Tunnels

A closed cold frame or tunnel on a sunny day overheats within minutes. Vent every sunny day — open in the morning, close before dusk.

Buying Cheap, Non-UV-Stabilised Products

Non-UV-stabilised mesh and fleece degrades in sunlight within one season, becoming brittle, developing holes, and failing when you need it most. UV-stabilised products cost a little more but last five to ten seasons — far cheaper per season of use.

Forgetting to Remove Netting for Pollination

Crops that require bee pollination (strawberries, courgettes, runner beans, tomatoes in some cases) must have mesh or fleece removed during flowering. Root crops and brassicas do not require pollination and can stay covered throughout.

Comparison Table

Pre-Purchase Checklist

• What are you protecting against — frost, insects, birds, wind, or sun?
• For insect protection: which specific pest? This determines the mesh size you need.
• For frost protection: how cold does it get? This determines the fleece weight.
• What area do you need to cover? Measure beds and allow extra for securing the edges.
• Do you need hoops, pegs, or a frame to support the covering?
• Is the product UV-stabilised for outdoor longevity?
• For netting: will you support it taut on a frame (safer for wildlife) or drape it loosely (riskier)?
• Do any of your protected crops require insect pollination? If so, plan for mesh removal during flowering.
• Will you vent fleece and tunnels on sunny days to prevent overheating and humidity buildup?
• How will you store the product between seasons? Clean, dry, out of sunlight.

Why Buying Through Amazon Makes Sense

Amazon stocks plant protection from lightweight fleece and fine insect mesh through to complete fruit cage systems and cold frames. Product listings include fabric specifications (gsm, mesh aperture, UV stabilisation) and dimensions, along with customer photographs showing real installations.

Customer feedback is particularly valuable in this category, because the real test of a fleece or mesh product comes after a season of weather exposure — does the fabric hold up to UV? Does the mesh actually stop the targeted pest? Does the fleece survive being pegged and unpegged repeatedly? Buyers who describe their specific pest problems, local conditions, and how the product performed over time provide the real-world insight that product specifications alone cannot.

Amazon Marketplace Protections

When you purchase through Amazon, several consumer protections apply. Products sold directly by Amazon are covered by standard consumer rights legislation, including the right to return items within a specified period.

For products sold by third-party sellers on the Amazon Marketplace, the A-to-Z Guarantee provides additional protection. If an item does not arrive, arrives damaged, or is materially different from what was described, Amazon will investigate and, where appropriate, issue a refund.

Amazon Renewed products — professionally inspected and restored items — come with their own guarantee, providing confidence when purchasing pre-owned equipment at reduced prices.