Cannabis Growing
19 guides in this topic
Cannabis PPFD, PAR and DLI: A Practical Guide
Peer-reviewed research shows cannabis yield increases linearly with light intensity well past 1,000 µmol/m²/s in flower, making PPFD and DLI among the highest-leverage variables to measure and optimise — and a quantum sensor or a well-used phone app is all you need to start.
Watering Cannabis: Stage-by-Stage Guide
Water cannabis deeply but infrequently, let the medium dry back substantially between waterings to pull oxygen into the root zone, and learn to distinguish the puffy droop of overwatering from the papery droop of underwatering — cannabis shows both clearly once you know what to look for.
Cannabis Humidity and VPD by Growth Stage
Target stage-appropriate VPD ranges drawn from grower consensus — roughly 0.4-0.8 kPa for seedlings, 0.8-1.2 for vegetative growth, and 1.0-1.6 for flower — and monitor across the full day-night cycle, because the humidity spike at lights-off is where the biggest disease risk lives.
Cannabis Temperature: Stage Ranges, DIF and Heat Stress
Keep vegetative cannabis in the range of roughly 22-28 °C, drop slightly to 24-26 °C in flower to preserve terpenes, maintain a positive DIF of five to eight degrees for compact structure, and treat temperature data as a diagnostic tool — heat stress symptoms overlap with nutrient problems and only the thermometer tells them apart.
Cannabis Growth Tracking: Metrics That Matter
Track height, internode spacing, stem diameter and canopy width weekly at the same time of day — growth rate is a leading indicator of plant health, and two cycles of data turn optimisation from guesswork into a repeatable process.
Cannabis Grow Diary: What to Log Each Cycle
Log cultivar, key dates, daily environment and feeding data, and weekly measurements — a cannabis diary turns a single harvest into a repeatable process and is the only reliable way to understand what drove changes in quality, yield, or timing between cycles.
Cannabis Nutrient Deficiencies
Read the position of the symptom first: mobile elements (N, P, K, Mg) scar the old lower leaves, immobile elements (Ca, Fe, Zn) damage the new growth — and always rule out pH and watering problems before adding nutrients.
Cannabis Pests and Diseases
Inspect leaf undersides and new growth with magnification on a routine, and keep humidity low and air moving — the environment, not the spray, is what prevents most cannabis pests and diseases.
Cannabis Training Techniques
Topping cuts the main shoot for permanent structure, LST bends branches to make a flat canopy, SCROG is LST under a net, and defoliation only removes what blocks light or airflow — do one stressful operation at a time during vegetation.
Cannabis Propagation and Cloning
Keep the environment — humidity, moisture, oxygen at the cutting base — consistent after the cut, and treat soilless and aeroponic methods as two valid rooting strategies whose results depend mainly on how well you control that environment.
Cannabis Seed Germination
Germinate seeds with controlled warmth, consistent moisture, and a defined light cycle once the taproot shows — then plant promptly; most failures come from drowning, drying, extreme temperatures, or transplanting a seed left to sprout too long.
Cannabis Drying and Curing
Dry slowly and cool, then cure in sealed jars with a burping routine — the way you manage moisture through drying and curing decides both how much potency you keep and whether the flower stays clean and safe.
Cannabis Overwatering vs Underwatering: Signs and Fixes by Stage
Touch the leaves and lift the pot before reaching for the watering can — a heavy, puffy droop in wet medium means stop watering, a papery droop in a light pot means water now, and in late flower precision matters most because rot, not drought, is the expensive mistake.
Cannabis Feeding Schedule: Dosage, EC, and Tracking by Growth Stage
Ramp feed strength with the plant — almost nothing for seedlings, moderate and nitrogen-forward in veg, higher EC with more phosphorus and potassium in flower — and log every dose with its EC and pH, because the record is what lets you trace a symptom back to its real cause weeks later.
Cannabis VPD Chart: Target Ranges by Growth Stage
Aim for the commonly cited grower ranges — roughly 0.4-0.8 kPa for seedlings, 0.8-1.2 in veg, and 1.0-1.5 in flower — and judge the tent by its full 24-hour VPD pattern, because the collapse at lights-off is where flower-stage risk concentrates.
Cannabis Grow Tent Setup: Environment, Airflow, and Equipment
Buy the tent for the canopy the plant will have in week eight, size the light and exhaust to that canopy and its heat, put gentle airflow at every layer — and choose equipment that can hit the driest flower-stage target, because that is the one you cannot retrofit in week six.
Why Is My Cannabis Plant Stretching or Growing Slowly?
Wide, week-after-week internode gaps in veg mean the light is too far or too weak; a fast stretch in the first two to three weeks after the 12/12 flip is normal and self-limiting; and when growth slows instead, rule out temperature, roots, pH, and feed strength in that order.
Cannabis Leaf Problems: Yellowing, Curling, and Drooping Explained
Check water, temperature, and light distance before touching the nutrient bottle — most cannabis leaf symptoms start there — and hand the case to the deficiency or pests guides only when the simple fixes have not resolved the pattern.
Is There an App for a Cannabis Grow Journal?
Cannabis-specific grow-journal apps exist and earn their keep through stage tracking, EC/pH feeding logs, harvest and cure records, and cycle-to-cycle comparison — the structure that turns each grow into a reference for the next.