Training Techniques for Higher Yields: Topping, LST, and SCROG

Training is the art of shaping the plant so that light and energy are distributed more evenly. The goal is usually a flatter canopy with multiple strong flowering sites instead of one tall central cola and many weak lower branches.

Three classic techniques cover most home-grow needs.

Topping

Topping removes the main growing tip, usually above the 4th–6th node. The plant responds by activating the two side shoots below the cut, creating two main colas instead of one. Further toppings can multiply the number of tops.

Best done in early to mid vegetative growth while the plant still has time to recover. Avoid topping stressed or very young plants.

Low-Stress Training (LST)

LST bends and ties branches so they grow outward rather than upward. Soft plant ties, garden wire, or pipe cleaners work well. The main stem and side branches are gently guided into a more horizontal plane.

LST can be started early and continued throughout vegetative growth. It is less traumatic than topping and works well on its own or combined with topping.

Screen of Green (SCROG)

A screen (netting or wire mesh) is placed above the plants. As branches grow through the screen they are tucked or tied horizontally, creating an even table of growth. Once the screen is filled, the plant is flipped to flower.

SCROG maximises light interception in a limited vertical space and is especially popular in indoor tents. It requires more daily attention during the vegetative stretch.

Combining methods

Many growers top once or twice, then use LST or a screen to spread the resulting branches. The combination produces a wide, even canopy that fills the available light footprint efficiently.

Timing and recovery

Any training that involves cutting or significant bending should be done while the plant is still vegetative and healthy. Give the plant time to recover before major environmental changes or the flip to flower. Stressed plants take longer to bounce back.

What training does not do

Training cannot compensate for poor genetics, inadequate light, or nutrient problems. It amplifies the results of good fundamentals; it does not replace them.

Final advice

Start simple. Master one technique before layering several. Observe how your particular cultivar responds — some stretch aggressively, others stay compact. The best training plan is the one that matches both the plant and the space you actually have.