Apical Dominance (Cannabis Growing)
Apical dominance is a plant growth pattern where the main stem grows more aggressively than lower branches. This occurs because the top of the plant produces hormones that suppress lateral growth, directing energy upward.
Apical dominance is a natural trait in cannabis plants.
What Does Apical Dominance Do to Cannabis Plants?
Apical dominance causes:
- One main cola to grow taller than others
- Reduced growth in lower branches
- Uneven canopy height
- Light concentration at the top of the plant
Without intervention, most cannabis plants prioritize vertical growth.
Apical Dominance and Training Techniques
Many training methods are designed to reduce apical dominance, including:
- Low stress training (LST)
- Topping
- Supercropping
- SCROG
These techniques redistribute growth hormones to encourage more even branching.
Apical Dominance and Autoflower Cannabis
Autoflowers naturally exhibit apical dominance, but:
- Their short life cycle limits aggressive correction
- Gentle training works better than high-stress methods
- Early canopy guidance produces the best results
Managing apical dominance early can improve autoflower yields without added stress.
Why Apical Dominance Matters Indoors
In indoor grows, apical dominance can:
- Cause uneven light distribution
- Increase risk of light stress on top colas
- Reduce overall canopy efficiency
Even canopies use light more effectively.
Common Misunderstandings About Apical Dominance
- It is not a problem by default
- It does not require correction in every grow
- Some growers prefer a single main cola
Whether to manage apical dominance depends on goals and grow style.
Is Apical Dominance Good or Bad?
Apical dominance is:
- Useful for simple grows and minimal training
- Limiting in small spaces with strong lighting
Growers choose whether to work with or against it.
Quick Summary
- Apical dominance favors main stem growth
- Caused by plant growth hormones
- Leads to a single dominant cola
- Often managed with training techniques
- Autoflowers benefit from early, gentle control