Insect netting for vegetable gardens blocks over a dozen common pests while letting sunlight, air, and rain reach crops, making it the most effective physical barrier for organic pest control.
Spraying for cabbage worms and aphids gets old fast. The fabric lets everything plants need through while keeping damaging insects out. The trick is matching the right mesh to your specific pests and installing it before eggs hit the leaves.
What Pests Does Garden Netting Stop?
Fine-mesh insect netting blocks the full range of common vegetable pests, including cabbage root fly, carrot fly, cabbage white butterfly, pea moth, leek moth, cutworm, onion fly, thrips, whitefly, leaf miners, and aphids. It also deters birds and small animals from seedlings. The netting works as a simple physical barrier — pests simply cannot reach the plants to feed or lay eggs.
Choosing the Right Mesh Size
Mesh density determines what the netting actually stops. Anything under 30-mesh is essentially bird netting and lets small insects through. For cabbage moths, grasshoppers, and caterpillars, 40-mesh works. For thrips, leafminers, and tiny aphids, you need 60-mesh or denser — an ultra-fine 0.8 mm mesh or 850 µm rating. The tighter the weave, the smaller the pest it blocks, but denser mesh also reduces airflow slightly, so match the mesh to the specific pest you are fighting rather than going finest by default.
| Mesh Density | Pests Blocked | Best For |
|---|---|---|
| Under 30-mesh | Birds, small animals | Seedling protection only |
| 40-mesh | Cabbage moths, grasshoppers, caterpillars | Brassicas, leafy greens |
| 60–80 mesh | Thrips, leafminers, small aphids | Onions, leeks, carrots |
| 0.8 mm / 850 µm | Whitefly, aphids, butterflies | Peppers, eggplants, tomatoes (pre-bloom) |
How To Install Insect Netting Correctly
Installation timing matters more than technique. Put netting over the bed before pests arrive — once eggs are laid or insects are established, the cover traps them inside with the plants. Inspect the soil surface and plants thoroughly before covering. Use flexible hoops (PVC, metal, or heavy wire) to lift the fabric off the foliage; netting resting on leaves gives insects a bridge to feed through. Drape the mesh over the hoops and anchor all edges with landscaping pins, sandbags, or soil. Overlap seams by at least six inches and reinforce openings and ends. Remove netting only for harvest, pruning, inspection, or when pollinator access is needed.
Common Mistakes That Ruin the Protection
Three errors cause most failures. First is buying mesh too coarse for the actual pest — 30-mesh against aphids wastes your time. Second is installing after pests have already laid eggs, which turns the netting into a bug incubator. Third is letting the fabric touch the crop foliage, which lets insects feed right through the mesh. Also avoid using rough fasteners that tear the fabric; soft clips or purpose-made pins last longer.
Mesh material also affects lifespan. UV-stabilized nylon, polyester, or polypropylene resists sunlight degradation best. Reinforced or hemmed edges prevent fraying during installation and removal. Store netting in a dry, shaded spot between seasons and clean debris off regularly to extend its useful life.
Pollinator Crops Complicate Things
Netting blocks all insects, including bees. For crops that need insect pollination — peppers, tomatoes, squash, melons, cucumbers — remove the netting as soon as flowers appear. For self-pollinating crops like lettuce, carrots, onions, peas, and brassicas, you can leave the cover in place through the entire season. The trade-off is worth planning: netted pollinator crops need you to play bee, or you get no fruit.
One well-placed cover saves a season of spraying. The upfront work of matching mesh to pest, installing hoops, and sealing edges pays back every time you walk past a pest-free row.
FAQs
Can I reuse insect netting next year?
Yes, with care. Clean off debris, check for tears, and store in a dry, shaded area. UV-stabilized netting typically lasts two to three seasons before sunlight degradation weakens the fabric.
Does netting keep slugs and snails out?
Not reliably. Slugs and snails come from the soil surface where netting meets the ground. A copper barrier or diatomaceous earth at the base works better for mollusks.
Will dense mesh overheat my plants?
Some heat buildup is possible with 60-mesh and finer, especially in full summer sun. Lift the fabric on hoops rather than laying it flat; the air gap under the mesh reduces heat stress compared to netting touching foliage.
References & Sources
- Spokesman-Review. “In the Garden: Garden insect netting is a game changer.” Covers pest types, installation timing, and common mistakes.
- Andermatt Garden. “Which Garden Netting is Best?” Explains mesh sizes, materials, and which pests each density blocks.
- Greenhouse Megastore. “Insect Netting Collection.” Product specifications for mesh densities and UV-stabilized materials.