Coir & preparation
Washing or buffering?
A low EC result and a buffering treatment answer different questions. Confirm both on the product specification before deciding how to prepare your cocopeat.
Check with CobyFind your next step →Feed & EC · WITH DRIP
Why do my cocopeat EC readings differ?
First compare the test methods, then compare the numbers. A supplier’s extraction result and drainage from a fertigated crop describe different samples.
Teral grower guidance · Updated 27 October 2026
DripYour feed & ec guideTHE COCOPEAT CONNECTION
Why the root zone matters
EC indicates dissolved salts, not which nutrients or unwanted ions are present. Fertiliser, source water, crop uptake and sampling conditions can all influence a coir result.
01 / OBSERVE
Three checks before you change anything
- Write down whether the sample is source water, feed, routine drainage, a standardised PourThru sample or a laboratory extract.
- Record the extraction ratio, units and meter calibration. EC in mS/cm is not the same label as ppm.
- Sample consistently and follow the trend. Use interpretation limits for the crop and the exact method.
02 / NARROW IT DOWN
What differs between the readings?
Choose the closest observation for a suggested next check.
Different extraction methods
Keep the results separate. Re-test with the same validated method; do not multiply 1:5 by a simple ratio to predict 1:1.5.
One meter shows ppm
Find the meter’s conversion scale or switch both meters to EC. Calculated ppm values can differ even for the same solution.
Same method, rising trend
Verify calibration and repeat representative samples. Review feed, water quality and irrigation with your adviser before changing the nutrient programme.
03 / TAKE THE NEXT STEP
Leave with something useful
Make a short log: sample type, method, date, EC unit, pH and irrigation timing.
Keep in mind
Do not diagnose a specific deficiency, sodium level or buffering quality from EC alone.
Discuss this with Teral →Watch the related Growlab lessons
The written checks above stand on their own. These short lessons add context.
EC vs TDS vs PPMWatch on YouTube ↗What is EC? Testing cocopeatWatch on YouTube ↗Pour-through runoff EC testWatch on YouTube ↗
Lesson links selected from Growlab’s supplied transcript and description review.
Further technical reading
CONNECTED QUESTIONS
