Roots & watering
Uneven watering or dry bags
When one bag dries while its neighbour stays wet, start by comparing water delivery. Increasing irrigation everywhere can make the wet areas worse.
Check with DewyFind your next step →Plants & climate · WITH FERN
How does greenhouse humidity affect cocopeat watering?
Read temperature and humidity together. The same relative humidity at different temperatures does not create the same drying demand on a plant.
Teral grower guidance · Updated 27 October 2026
FernYour plants & climate guideTHE COCOPEAT CONNECTION
Why the root zone matters
Water held in cocopeat supplies the transpiration stream. When climate and crop demand change, an unchanged irrigation schedule may leave the root zone too wet or too dry.
01 / OBSERVE
Three checks before you change anything
- Log temperature and relative humidity at crop height across the day and night.
- Compare moisture and drainage on bright days with cool or cloudy days.
- Inspect condensation, cold surfaces and wet foliage. Coordinate ventilation, heating and airflow with the greenhouse operator.
02 / NARROW IT DOWN
When is the problem most visible?
Choose the closest observation for a suggested next check.
Cool mornings with condensation
Review overnight and early-morning climate management. Identify where condensation forms rather than simply reducing all irrigation.
Hot afternoons with wilting
Check water delivery and root-zone moisture alongside heat exposure. Do not assume wilting always means the medium is dry.
Media stays wet on cloudy days
Compare crop demand with the irrigation schedule and adjust using measurements and crop advice.
03 / TAKE THE NEXT STEP
Leave with something useful
Keep a day-and-night climate log beside your irrigation and moisture observations.
Keep in mind
One universal humidity or VPD target will not suit every crop and growth stage.
Discuss this with Teral →Watch the related Growlab lessons
The written checks above stand on their own. These short lessons add context.
VPD vs relative humidityWatch on YouTube ↗Greenhouse condensationWatch on YouTube ↗Transpiration: do plants sweat?Watch on YouTube ↗
Lesson links selected from Growlab’s supplied transcript and description review.
CONNECTED QUESTIONS
