Outdoor & Protected Cultivation
Pollen Drift & Outdoor Pollination Risk
Airborne pollen can move beyond the source plant. Outdoor pollination risk depends on flowering synchrony, source abundance, wind and turbulence, distance, terrain, and local plantings; visual distance alone cannot guarantee isolation.
Key concepts
- Cannabis pollen can be transported by air
- Risk is highest when viable pollen release overlaps receptive flowers
- Wind direction changes over time
- Physical distance lowers but does not make risk zero
What to measure or observe
- Record nearby known pollen sources when possible
- Track male or pollen-producing flower development
- Document prevailing and event-specific wind direction
- Inspect receptive flowers and later seed formation across the site
Common mistakes
- Treating a single isolation distance as a guarantee
- Ignoring neighboring volunteer or unmanaged plants
- Using average wind direction instead of actual flowering-period conditions
- Assuming absence of visible pollen means no exposure
Visuals this lesson still needs
- Pollen-source risk map
- Flowering-overlap timeline
- Wind-plume concept diagram
- Pollination outcome sampling map