7 Best Trellis Netting Systems For Grow Tents (2026 Review Guide)

Fixed-grid netting, typically sold in pre-set square sizes like 4×4 or 6×6 inches, works well for SCROG setups where you want uniform canopy spread with minimal adjustments mid-grow. Adjustable trellis systems let you modify hole spacing and tension as plants develop, which gives more control over uneven or fast-growing strains but requires more hands-on time. If you're growing a single strain with predictable structure, fixed-grid is simpler; mixed strains or irregular growth patterns benefit more from adjustable systems.

Elastic netting typically costs 30 to 60 percent more than rigid polyester or nylon options but reduces stem damage during training because it gives slightly rather than cutting into plant tissue under pressure. For high-value photoperiod grows where you're running the same plants for months, that flexibility translates to fewer broken branches and better yield protection. For short autoflower cycles or budget grows, standard nylon netting at 2 to 4 dollars per square foot does the job without the added expense.

A 2-inch grid gives you finer control over individual branches and works best for low-stress training on dense, bushy strains where you need to separate a large number of shoots. A 4-inch grid accommodates thicker stems more easily, reduces netting snag during plant checks, and suits taller, more open growth structures like sativa-dominant strains. The right choice depends on your plant count and canopy density – one or two large plants in a 4×4 tent generally do better with 4-inch spacing, while four to nine plants in the same space benefit from 2-inch grids.

The most common mistake is buying netting sized to the tent's footprint rather than accounting for the vertical installation height and the sagging that occurs once plant weight loads the net. A net installed at 18 inches above the pot will sag 3 to 5 inches under a full canopy, effectively reducing your usable training plane. Growers should also avoid single-layer netting when running a heavy SCROG – two horizontal layers set 6 to 8 inches apart provide structural support that a single layer cannot sustain under dense bud weight.

Measure the interior width and depth of your tent at the pole height where you plan to install the net, then add 10 to 15 percent extra netting on each side to allow for tensioning without pulling the frame inward. Most grow tent poles are 16 to 25 mm in diameter, and bungee cords or zip ties rated for that diameter are the safest attachment method – direct rope knots on plastic-coated poles can crack the coating and cause rust. Avoid anchoring netting to tent zipper tracks or corner fabric seams, as sustained plant weight will stress those attachment points and tear the tent lining over time.

Nylon and polyester trellis netting lasts 3 to 5 grow cycles under normal use before UV degradation and repeated tension cause the mesh to weaken and break at the knot intersections. Between cycles, soak the netting in a 1:10 bleach-to-water solution for 30 minutes, rinse thoroughly, and allow it to dry completely before storage to prevent mold transfer to new plants. Elastic netting has a shorter usable lifespan of 2 to 3 cycles because repeated stretching permanently reduces its tension capacity, so budget for replacement more frequently if elasticity is part of your training strategy.