ScrOG blOG™ — trellis

This is how WW 1 progressed through veg and flower. See the grow detailed side by side at "Tale of Two Widows" at 420Magazine...

SOG - SOG is used to create "perpetual harvests". The method involves high plant counts per cu ft and short grow cycles. Clones are introduced to 12/12 flowering with little to no veg cycle. Trellis or other screen material may be used to support heavy colas but no plant training techniques are used. Many growers cannot use SOG due to local plant count limitations. 

Sea of Green (SOG), multiple plants

ScrOG - The ScrOG method involves lower plant counts, typically 1 plant per 2'x2' area. Veg periods vary, with longer veg periods resulting in canopies larger than 2'x2'. Screens are used to facilitate plant training which results in short bushy plants with virtually all target bud sites in the best lighting zone. ScrOG method is touted to produce 2 to 3 times the yield of traditional growing methods.

Screen of Green (ScrOG), single plant

There are a number of variations of the ScrOG method. We have scoured the internet and selected what we consider to be some of the better "How to Guides" below.

How to install a ScrOG - Budson Buds, YouTube

Your Complete Guide to Low Stress Training For SCROG Marijuana Growing, Big Buds Magazine

The original Screen of Green (ScrOG) was invented and popularized by Wolf Segal of Portland, Oregon. Previously, underground growers (including Wolf) would use SOG (Sea of Green) to ensure perpetual harvests. SOG puts several plants under one screen. Wolf was arrested and jailed during operation "Green Merchant" in the 90s and gained the distinction of having the highest plant count in history. Wolf then came up with the concept of ScrOG to dramatically reduce plant counts and at the same time maintain high yields.

Growers who have embraced the concept of ScrOG have found far more benefits than just reducing plant counts.

Why do many growers prefer single plant ScrOGs?

1. Ease of providing individual plant care - When 2 or more plants are placed under a single ScrOG net, those plants are typically treated the same out of necessity.  Growers have trouble getting to plants at the far reaches of the grow. All plants are treated the same despite their strain maturity level or health.
2. Simple to move around if necessary - If you need to pull a plant from a grow for any reason, you need to cut the net and remove it, leaving remaining plants unsupported. 
3. Improved light distribution - Growers can rotate, custom adjust heights, plants grow at different rates and mature a different rates.
4. Easy to remove troubled plant from grow space, lowers risk of damage to remaining crop
5. Easier to water and flush
6. Allows gardener to harvest plants individually at precise maturity
7. Eliminates crawling under nets/wire mesh
8. Wheel chair / handicap accessibility
9. Irrigation equipment accessibility
10. A single plant can be scrogged at an optimal time in its growth cycle. Otherwise, only the most aggressive growing plants enjoy the full benefit of Screen of Green.

P SCROG Techniques

Espaliered Pear and Apple Trees (above)

” The most important advantage (of espalier) is that of being able to increase the growth of a branch by training it vertically. Later, one can decrease growth while increasing fruit production by training it horizontally.” ¹  

Scrogging builds on the espalier technique to grow short, bushy horizontal plants allowing for maximum bud development. The main stem of the plant is forced to multiply by Topping.  Low Stress Training (LST) is accomplished by bending the branches of stems under the lower training screen resulting in more bud development per branch.  Lollipopping all leaves of lower branches focuses the energy upward to bud development. A flat horizontal plane of buds, developing all in unison, can be placed in the optimal light intensity band at the same time.  No buds are stunted due to upper growth shading and all plant energy is focused solely on bud development.

                           

Most references to the ScrOG method espouse 2 to 3 times increase in bud yield.²

^{1.        Wikipedia  “espalier”     2. GrowWeedEasy.com}

The general properties can be summarized as follows:

• excellent physical properties
• excellent toughness
• very good heat resistance
• ​good ​chemical resistance
• ​electrical resistance​
• transparen​t​
• horticulture friendly

The following diagram compares the impact strength of polycarbonate to other common polymers.

Data from Polymer Technologies & Services, LLC.

SCROGGER warranties P SCROG screens for 5 full years because of the quality and strength of the polycarbonate material. With the P SCROG 4 20 sale, ​that works out to about $5 a grow** over the warrantied life.

Topping or FIMing your cannabis plant is an essential ingredient to promote doubling or tripling yield when using the P SCROG. Instead of one large central cola, topping and FIMing techniques promote multiple branches and bud sites that through low stress training fill the screen of the P SCROG with a bouquet of succulent dense flowers. 

Pre-harvest P SCROG

Topping - Cutting the plant above the top node. Topping can and should begin early in vegetative cycle. Each topping produces 2 branches. Two to three toppings during the vegetative cycle will produce 4 - 6 branches with multiple bud sites. As the branches stretch under the screen with use of low stress training (LST), the plant's foliage increasingly fills the P SCROG screen's planar surface. The stretch during training positions the bud sites such that they will grow through the openings of the polycarbonate screen.

Proper topping technique produces even numbers of branches making it possible to fill the screen symmetrically during the training process. Depending upon the strain, a P SCROG screen can reach the target of 75% to 80% full in 30 to 45 days of veg, at which time the plant should begin flowering cycle and should stretch enough to completely fill the screen.

"fuzzygrow" on YouTube

From "GrowWeedEasy.com"

FIMing - "FIM" is a growing culture acronym that stands for "F--K I missed". While not a scientific description of the method, it accurately describes the reaction one might have if you realize you didn't actually top the plant, you instead pinched off the top new growth and missed the rest.

While the FIM method may have been discovered by accident, many people claim it is superior to topping for the following reasons:

1. Produces a shorter bushier plant

2. Less stress and recovery time for the plant

3. Produces 4 branches for each FIMing

LST is performed the same as with topping with the objective of filling 75% to 80% of the P SCROG training screen before switching to flowering cycle.