Grower Glossary – OUpdated 8 days ago

O

“O” stands for organics, oxygen, and osmosis — the biological balance every grow needs. This glossary section explains how organic systems and oxygen flow drive root vitality and nutrient efficiency.

Obligate Aerobe

A microbe that can only survive in oxygen-rich environments.

Grower Slang: “O₂ bug.”

Essential for aerobic composting and living soil health.

Obligate Anaerobe

A microorganism that thrives only in oxygen-free environments.

Grower Slang: “Anaerobe.”

Can cause root rot or foul smells in overwatered systems — keep root zones oxygenated.

Occlusion

A blockage in plant tissue or vascular flow caused by salt buildup or disease.

Grower Slang: “Nute block.”

Cronk Tip: Regular flushing prevents occlusions in coco and hydro grows.

Off-Gassing

The release of chemical vapors from plastics, paints, or adhesives.

Grower Slang: “Room fumes.”

Always use non-toxic materials in grow rooms — VOCs can stress plants and affect terpene quality.

Off-Pheno (Grower Slang)

A phenotype that doesn’t match desired traits (yield, aroma, structure).

Grower Slang: “Oddball,” “wild pheno.”

May still produce unique terpenes — some off-phenos become future breeders.

OG (Original Gangster / Ocean Grown)

A legendary cannabis lineage known for dense buds and gassy aroma.

Grower Slang: “OG,” “OG Kush,” “Ocean Grown.”

Cronk Tip: OG varieties love cooler temps and steady EC around 1.8–2.0 in bloom.

Oil

A concentrated cannabis extract rich in cannabinoids and terpenes.

Grower Slang: “Dab oil,” “hash oil.”

Made through solvent or solventless extraction processes.

Oligotrophic Soil

Soil with low nutrient levels and minimal organic matter.

Grower Slang: “Poor soil.”

Boost fertility with compost, amendments, and PuurOrganics nutrients.

One-Hitter

A small smoking pipe designed for single inhalations.

Grower Slang: “Bat,” “dugout.”

Often used for sampling flower potency or testing new harvests.

Open Pollination

Allowing plants to reproduce naturally without controlled breeding.

Grower Slang: “Open breed,” “wild pollination.”

Produces diverse genetic variation but less consistency.

Organic Growing

Cultivating plants using natural inputs (compost, microbes, minerals) instead of synthetic fertilizers.

Grower Slang: “Organic,” “living grow.”

Cronk Tip: Use PuurOrganics Line for clean, sustainable feeding that supports soil life and long-term fertility.

Organic Matter (OM)

Decomposed plant and animal material in soil that feeds microbes and improves structure.

Grower Slang: “Compost base.”

Cronk Tip: High OM = better water retention and nutrient buffering.

Organic Nutrients

Plant nutrients derived from natural, carbon-based sources.

Grower Slang: “Organics,” “natural feed.”

Cronk Tip: PuurOrganics is 100% plant-based and upcycled for clean, sustainable performance.

Osmosis

The movement of water across root membranes from low to high solute concentration.

Grower Slang: “Water pull.”

Drives nutrient absorption — proper EC balance keeps osmotic flow healthy.

Osmotic Pressure

The force created by osmosis that moves water into plant roots.

Grower Slang: “Root pressure.”

Too high EC increases osmotic pressure, leading to dehydration or nutrient lock.

Overfeeding

Providing more nutrients than plants can absorb.

Grower Slang: “Hot mix,” “too strong.”

Cronk Tip: Watch EC levels — flush and rebalance if tips burn or leaves darken.

Overwatering

Giving too much water, suffocating roots and encouraging anaerobic microbes.

Grower Slang: “Drowned roots,” “too wet.”

Cronk Tip: Let pots dry 50–70% before watering again; use fabric pots for better airflow.

Oxidation

The loss of electrons during chemical reactions — often seen as browning or degradation in nutrients or trichomes.

Grower Slang: “Breakdown.”

Store nutrients in cool, dark conditions to prevent oxidation.

Oxygenation

Supplying oxygen to the root zone, often through air stones or well-drained media.

Grower Slang: “O₂ flow.”

Cronk Tip: Essential in hydro and coco — roots love oxygen as much as water.

Oxidative Stress

Damage caused by excessive light, heat, or oxygen radicals inside plant cells.

Grower Slang: “Plant stress.”

Balanced light intensity and micronutrient support help prevent this.

Ozone (O₃)

A molecule used for sterilization and odor control in grow rooms.

Grower Slang: “O₃,” “ozone cleaner.”

Use carefully — too much ozone can harm plants and humans.

Offcut (Cloning Slang)

A clone or cutting taken from a less desirable branch or plant.

Grower Slang: “Scrap cut.”

Often used for testing nutrients or training before working with main genetics.

Outcross

Breeding between unrelated strains to introduce new traits or vigor.

Grower Slang: “Crossbreed,” “hybrid cross.”

Used to improve structure, yield, or resistance.

Outgassing (Environmental Term)

Similar to off-gassing, but can also refer to the natural emission of CO₂ from soil and microbes.

Grower Slang: “Soil breath.”

Healthy living soil “outgasses” CO₂ as microbes decompose organics.

Outdoor Grow

Cultivation under natural sunlight and open-air conditions.

Grower Slang: “Outdoor,” “sun grow.”

Cronk Tip: Use PuurOrganics for sustainable outdoor runs and richer soil ecology.

Out-of-Phase Lighting

When lights turn on/off asynchronously, often due to timer error.

Grower Slang: “Timer drift.”

Can stress photoperiod plants — double-check timers after power outages.

Overcooked (Slang)

Grower slang for over-mature buds or over-dried harvests.

Grower Slang: “Crispy,” “overdone.”

Leads to harsh smoke and terpene loss — dry slow, cure cool.

Overdrying

Removing too much moisture during curing or drying.

Grower Slang: “Crisped buds.”

Target 10–12% moisture for perfect burn and smooth flavor.

Overflow

Runoff from overwatering or excess nutrient solution.

Grower Slang: “Spill.”

Indicates poor drainage or irrigation calibration.

Overlap (Lighting Term)

The zone where multiple light footprints intersect, increasing total intensity.

Grower Slang: “Hot overlap.”

Adjust fixtures to maintain even PPFD across canopy.

Oxidizer

A compound that promotes oxidation (like hydrogen peroxide).

Grower Slang: “Sterilizer.”

Used in cleaning reservoirs or sterilizing hydro systems.

Organic Residue

Leftover organic material from feeds or decomposed matter.

Grower Slang: “Build-up.”

Flush periodically in coco or hydro to prevent biofilm accumulation.

Organoleptic Quality

A term describing flavor, aroma, and sensory profile of buds.

Grower Slang: “Flavor quality,” “terp hit.”

Enhanced by slow curing and carbohydrate supplements like Sticky Bandit.

Outlier Phenotype

A plant showing unique or extreme traits outside the average population.

Grower Slang: “Unicorn pheno.”

Can be bred selectively for unique cannabinoid or terpene expression.

Overripened

When buds mature too long, leading to degraded THC and increased CBN.

Grower Slang: “Late chop,” “amber city.”

Cronk Tip: Harvest when trichomes are 70–80% cloudy with 10–20% amber.

Overtraining

Excessive topping, bending, or defoliation that stresses plants.

Grower Slang: “Too much LST.”

Cronk Tip: Allow 3–5 days recovery between major training sessions.

Oxidized Nutrients

Nutrients that have reacted with oxygen, often losing potency or solubility.

Grower Slang: “Stale mix.”

Always mix fresh and avoid storing pre-mixed solutions longer than 24 hours.

Oxidoreductase

An enzyme class responsible for oxidation-reduction reactions in plants.

Grower Slang: “Redox enzyme.”

Important in energy transfer and stress defense.