Climate & Environment
11 guides in this topic
Temperature Effects on Plant Growth
Keep the day-to-night temperature swing at about five to eight degrees Celsius, stay within the crop's stage-specific range, and treat the thermometer as one data point among several for diagnosing problems.
Humidity and VPD for Plants
Track VPD, not just RH — it tells you the real drying force on the plant, and each growth stage has its own safe window.
Grow Tent Too Hot, Too Humid, or Too Dry? How to Fix It
Diagnose the direction first — too hot, cold, humid, or dry — then apply the matching mechanical fix, and aim for a five to eight degree day-night temperature gap with humidity that stays controlled during the dark period.
Grow Tent Ventilation and Airflow: Intake, Exhaust, and CFM
One active exhaust fan with open passive intakes, sized generously against the one-to-three-minute air-exchange rule of thumb and tuned for slight negative pressure, covers cooling, CO₂ replenishment, and mould prevention all at once.
Indoor Grow Tent Setup: The Essential Equipment Checklist
Size the tent for your light's footprint and your plants at harvest, run a generously sized exhaust with a carbon filter and timer, and hang the sensor at canopy height — away from fans, walls, and ducting — because every climate decision downstream depends on what it reports.
Is There a VPD Calculator App for Grow Tents?
A real VPD app calculates it automatically the moment temperature and humidity are logged and shows it against a stage-specific target — not a static chart you have to cross-reference by hand every time.
Is There an App for Monitoring a Grow Tent?
Tent-monitoring apps come in two kinds — sensor-paired ecosystems and log-it-yourself trackers — and either works, as long as temperature, humidity, and ideally light end up logged continuously rather than checked once a day.
How Much CO2 Do Plants Need Indoors?
Indoor plants grow fine at ambient CO2 (~420 ppm) but can use more only when light is strong enough — enrichment pays off at higher ranges under more light and means nothing for seedlings, late flower, or a dimly lit tent.
CO2 PPM Calculator for a Grow Tent
A CO2 target for your tent comes from two honest inputs — recent canopy PPFD (more light, higher target; low light, no target) and ventilation mode — and cylinder duration falls out of one-time fill, leak compensation, and daily consumption math that your own logged readings will calibrate.
CO2 Enrichment for Indoor Grows
CO2 enrichment only pays off under strong light and controlled ventilation — match the injection rate to your tent's ventilation mode, log actual ppm readings against the target, and treat the human-safe ppm ceiling as a hard limit that has nothing to do with what your plants could tolerate.
When to Add CO2 to a Grow Tent
Add CO2 only when two thresholds clear — canopy light strong enough that photosynthesis isn't light-limited, and a growth stage between seedling and late flower — and check first whether your tent is even falling below ambient, because preventing CO2 starvation is cheaper than chasing enrichment.