Quick Answer
The best scrog net for a cannabis grow is a two-tier soft mesh kit with square openings around 3.5 to 4 inches (9 to 10 cm), cut to the footprint of your tent or room and tensioned with hooks or a frame. Elastic or soft nylon mesh beats rigid wire for most home gardens because you can weave, tuck, and reposition stems during stretch without kinking them. Add a second layer about 8 to 10 inches above the first once flowers start packing on weight.
how many plants under a scrog screen
- Best overall: two-tier elastic mesh kit sized to your canopy footprint
- Best budget: single-layer nylon trellis net with 4 to 6 inch squares
- Best for large rooms: rigid frame net or wire grid panel
- Best DIY: jute or hemp string trellis built to your own spacing
What Makes a Good Scrog Net
A screen of green works only when the mesh holds stems where you put them and still lets you move them by hand. That balance comes down to five details.
- Opening size: 3.5 to 4 inch squares are the sweet spot for tucking shoots. Six inch squares are looser, which suits a top support layer more than a training layer.
- Material: soft nylon, coated polyester, or elastic cord. Bare metal wire can cut stems and holds heat under strong lights.
- Size and fit: buy a net slightly wider than the canopy so it can be pulled tight. A slack screen defeats the purpose.
- Adjustability: hooks, clips, or ratchet straps let you raise the screen as plants stretch, instead of rebuilding it mid-flower.
- Cleanability: removable mesh that you can wash between runs limits pests and mold spores carried over from the last harvest.
Option 1: Two-Tier Elastic Mesh Kit (Best Overall)
These kits ship with a soft mesh panel, four corner hooks or adjustable straps, and enough stretch to pull tight across a tent. The elastic gives when a stem leans on it and returns to shape, so training stays gentle.
Why it wins
- Easy to raise as plants grow, which matches the changing height of a cannabis canopy
- Soft edges reduce stem damage during tucking
- Two layers handle both training and late-flower support
Where it falls short
- Elastic cord can sag over several cycles; inspect it before each run
- Cheap kits sometimes use wide openings that are too loose for early training
Option 2: Flat Nylon Trellis Net (Best Budget)
A basic nylon trellis with 4 to 6 inch squares costs little and covers a large area. It works well if you attach it to tent poles or a simple frame with clips, and it stays flat instead of stretching out of shape.
how many plants under a scrog screen
The tradeoff is adjustability. If the net is fixed at one height, it can only do one job, which is why many growers buy two and hang them at different levels.
Option 3: Rigid Frame or Wire Grid (Best for Large Rooms)
Commercial and garage grows often use a welded grid on a PVC or steel frame. The grid holds heavy colas without sagging, and one frame can support an entire row of plants.
Look for coated wire with rounded ends. Bare cut wire is the main complaint with metal grids, since sharp tips catch stems and skin during harvest.
Option 4: DIY String Trellis (Best Custom Fit)
Jute, hemp twine, or silicone-coated string lets you set your own spacing and shape, including curved screens for corner tents. Build the outer frame first, then weave lines in both directions and keep them uniformly tight.
- Use string thick enough to hold tension without cutting into stems
- Replace string each run to avoid carrying pathogens forward
- Mark row spacing before you start weaving so the squares stay even
How to Install and Use a Scrog Net
- Set the first screen 8 to 12 inches above the growing medium, before you flip to flower.
- Let shoots grow a few inches above the mesh, then bend each one under the next square open toward an empty gap.
- Repeat the tuck every two or three days during stretch so the canopy fills evenly.
- Flip to 12/12 when the screen is mostly filled and the canopy is close to level.
- Add the second net 8 to 10 inches higher in early flower to hold heavy buds upright.
- Stop tucking late in stretch and let the plant finish around the screen instead.
Common Mistakes
- Installing the screen too high, which leaves a leggy gap under the canopy
- Using openings so large that shoots slip back down
- Pulling the net so tight that it lifts the pot or bends tent poles
- Waiting until mid-flower to train, when stems have hardened
FAQ
What size mesh should a scrog net have?
For cannabis training, 3.5 to 4 inches works best for most gardens. Larger squares suit a support layer above a trained canopy.
When should I install the net?
Install it during late vegetative growth, before the plant stretches. This gives you time to fill the screen evenly before switching to flower.
Can I reuse a scrog net?
Yes, if the material holds tension and is clean. Wash nylon or elastic mesh in warm soapy water and let it dry fully, and swap out natural string each run.
Do I need two nets?
Not always, but the second layer helps with heavy indica flowers that tend to lean. One net trains the canopy; two nets train and support it.
Net designs and bundled hardware change from season to season, so check the current listing for mesh size and included mounting parts before you buy.