Even if you haven’t grown cannabis, you have most likely noticed photos of cannabis crops, each indoor and outside, with bug buds developing up by means of a nylon screen. This screen is known as a scrog, brief for “screen of green.”
Scrogging will boost the good quality of your cannabis plants and improve yields. There’s an art to placing a set of plants with each other and stretching out their limbs so they do not develop on leading of every single other or shade every single other out, but we’ll demystify the method.
Maintain in thoughts that every single plant is diverse and there’s no certain measurement for how close or far apart every single plant or branch should really be. Scrogging includes reading a plant to see what it requirements and ordinarily includes some fine-tuning. But with a tiny time and patience, your plants will be healthful and lush.
Why Scrog Your Cannabis?
Place on throughout the flowering stage or ideal just before it, a scrog has a couple of most important functions:
- It stretches out branches to expose far more nodes to direct light, thereby rising your yield.
- Stretching branches out increases the airflow by means of a plant, assisting to avert bud rot.
- A scrog adds help to branches so they will not flop more than or break as buds get larger.
All of the branches above the screen will fill out with thick buds and most of the foliage under the screen will get shaded out. You want to prune these bottom branches and dead leaves since they either will not make buds or will make subpar buds. You will get the most out of your plant if you can redirect sources from these branches to the good quality buds above the screen.
To start out, choose a set of plants, ideally of the very same height and size. It is really hard to scrog plants of diverse sizes since the screen requirements to be level across the complete canopy in order for light to distribute evenly.
Nylon screens come in diverse mesh sizes, ordinarily four-6” square. For a smaller sized develop, attempt a 4” mesh.
When Your Plants Do not Have to Move
Scrogging is less complicated when your plants remain in 1 spot all through their complete life, from vegetative stage to flowering, but based on your setup, you may have to move them.
In this scenario, you can just set the screen (far more under) just after you have completed all of your topping and let the plants develop into it. You will have to touch up the screen a couple of instances more than the coming weeks to make positive branches are spaced out evenly and not also crowded.
When Plants Have to Move Into a Flowering Space
Make positive your plants are in their final location since you will not be in a position to move them when below the screen. Plants also want to be transplanted to the suitable size of pot.
Plant Placement and Spacing
Plants want to be placed so they are not crowded, but not so far away that there are significant gaps in the canopy. You do want some space in involving plant branches when they are pulled up by means of the scrog—plants will nevertheless develop and fill in a tiny bit since they have at least eight weeks to go by means of the flowering cycle.
Plants want to be placed so they are not crowded, but not so far away that there will be significant gaps in the canopy.
As a guideline, for a 4’ x 8’ tray, attempt placing in 18 or 21 plants in five-gallon pots. That would give you 3 rows of either six or seven plants and should really give you a sense of how lots of plants will match with each other. You can adjust accordingly, primarily based on tray and pot size.
After all plants are in location, it can assistance to fold the branches back a tiny bit to get them prepared for the screen. Be cautious throughout this step! It is quick to snap branches.
Fold branches out and away from the most important stem, like a flower opening up or peeling a banana. Also maintain in thoughts that some strains are sturdier than other individuals and can withstand far more bending.
Stretching the Screen
You will want at least 4 points of make contact with to place the screen on. Most growers will use a vertical extension that can withstand some force, like a two-by-4 or a T-post, at every single edge of the canopy.
There are two strategies to place on a screen:
- Location every single corner of the screen on 1 post at a time, stretching the screen as you go.
- Place the screen on all 4 make contact with points somewhat loosely and tighten it down later.
Following the screen is on, shimmy it down till it is on leading of the plants. Ideally, you want the screen about six-9” above the lowest branching of the plants—this is the 1st topping you gave the plant and the 1st point at which the plant begins branching, just after the stem comes out of the soil.
After the screen is set in location, make positive it is tight, specially the edges. The tighter it is, the far more it will be in a position to hold shape and hold the weight of establishing buds. Zip ties come in handy right here.
You can grab a portion of the screen and pull it back and zip tie it to a post to tighten it up. Each and every point should really be tighten about the very same quantity, so that the screen does not come out lopsided. Be cautious not to pull the screen also tight, as it may snap.
At the finish of the day, the branches in the screen should really interlock with the branches of all the other plants about it. Feel of spreading out your hands and placing the fingers of 1 hand in involving the fingers of your other hand.
An critical query to ask just before placing branches into the scrog is: Exactly where does the branch want to go? If a branch does not want to remain exactly where you place it, you may want to location it someplace else. Do not force it.
Attempt to fill every single square mesh of the screen with a single branch—avoid placing two branches in 1 square and attempt not to leave a square empty. This will make sure that every single branch gets sufficient space and light and that the screen is utilized to its maximum possible. You may well not be in a position to do these based on how considerably plant material you have, but they are great suggestions to stick to.
An critical query to ask just before placing branches into the scrog is: Exactly where does the branch want to go?
Stretch a branch out as far as it can go, pull it up by means of the screen, and rest it on the screen. If it falls by means of, pull it back 1 mesh closer to the most important stem of the plant.
A great location to start out on the scrog is a corner, at 1 of the posts. Function your way down 1 of the edges to the subsequent post, and then do one more edge till all edges are filled in, then function on the middle.
Function methodically, placing the branches of 1 plant into the screen just before moving on to the subsequent plant.
If you are obtaining problems with a specific branch, 1 trick is to rotate the complete plant—by grabbing the pot and turning it—so that the branch in query is now facing exactly where you want it to go.
Following you are completed, it is a great concept to appear under the screen to make positive you didn’t miss any branches. If so, just pop them back in the screen.
Scrogging can strain a plant out, stretching all of its branches about. You will likely notice that your plants appear a tiny wilty, or like they “took a hit” just after carrying out it. But worry not—under some direct light, they’ll bounce back, and placing them by means of the scrog will be worth it in the lengthy run.
It is a great concept to water your plants inside 24 hours of scrogging them, just to give them a tiny enhance to pass the strain of the process.
It is also a great concept to verify the scrog two-three days later to touch it up. The plants will have grown into the screen a tiny bit in these couple of days, and you will have a much better sense of exactly where every single branch desires to go and exactly where all the buds will create.
Above the screen, a wonderful canopy of buds will create and fill in. But since the canopy becomes thick with buds, something underneath the screen will get shaded out and most most likely die. It is critical to clean up dead leaves and prune little branches that do not get light below the screen.
These branches may well start out establishing buds, but they will not be worth your time and work. It is much better to get rid of them and have the plant redirect sources to the buds above the screen, creating these much better and far more vibrant.