Feed & EC
EC readings do not match
First compare the test methods, then compare the numbers. A supplier’s extraction result and drainage from a fertigated crop describe different samples.
Check with DripFind your next step →Plant doctor · WITH DR. COCO
Why are leaves turning yellow in cocopeat?
Before adding feed, ask where the yellowing began. Older leaves, new leaves and whole-plant yellowing provide different clues, but none confirms a cause on its own.
Teral grower guidance · Updated 27 October 2026
Dr. CocoYour plant doctor guideTHE COCOPEAT CONNECTION
Why the root zone matters
In coir, root health and the nutrient solution matter together. A plant may struggle to take up nutrients even when fertiliser is present.
01 / OBSERVE
Three checks before you change anything
- Photograph the whole plant and both older and newer leaves. Note whether veins remain green or leaf edges are damaged.
- Inspect roots and moisture conditions. Compare with an unaffected plant in the same crop.
- Check calibrated pH and EC results against the crop’s targets and test method. Record recent fertiliser or water changes.
02 / NARROW IT DOWN
Where did yellowing start?
Choose the closest observation for a suggested next check.
Mostly older leaves
Record the pattern and rate of spread. Review feeding and root health; gradual ageing of a few lower leaves may be normal.
Mostly new leaves
Check root-zone pH and recent growth with your adviser. A leaf pattern alone cannot tell you which nutrient to add.
Whole plant or sudden wilting
Check water delivery and root condition promptly. Escalate rapid decline rather than repeatedly increasing fertiliser.
03 / TAKE THE NEXT STEP
Leave with something useful
Prepare photos, crop stage, root observations and recent pH/EC readings. Consider tissue and substrate analysis if the cause remains unclear.
Keep in mind
More fertiliser can increase salts without resolving the underlying cause.
Discuss this with Teral →Watch the related Growlab lessons
The written checks above stand on their own. These short lessons add context.
Lesson links selected from Growlab’s supplied transcript and description review.
Further technical reading
CONNECTED QUESTIONS
