How do I fix nutrient burn (ec too high) on cannabis?

Leaf tips dry out and burn when the feed is stronger than the plant can use, often because EC climbs as the tank level drops. Bring EC back to the chart value for the plant's week. Make a fresh tank. Lower EC in hot weather.

Visual Guide

Nutrient burn (EC too high).

Bring EC back to the chart value for the plant's week

← All problems

Dry, yellow-brown leaf tips that curl up

Illustration

Feeding & light

Leaf tips dry out and burn when the feed is stronger than the plant can use, often because EC climbs as the tank level drops.

Looks like this

Dry, yellow-brown leaf tips that curl up
Very dark green leaves
EC rising as the tank level drops

Solve it with Vitaponix

VitaBase →

Growth-phase base nutrient, 2–6 ml/L in weeks 1–6. Strongly reduces the need to flush mid-cycle.

VitaBulk →

Replaces VitaBase from week 7 at 5 ml/L; steers the plant towards heavier flowering.

How to fix it

Bring EC back to the chart value for the plant's week
Make a fresh tank
Lower EC in hot weather

Why it happens

Feeding above the chart EC
Plants drinking faster than they feed in hot weather
Old tank that has concentrated over time

Prevent it

Measure EC excluding your own water
Make a fresh tank every week
Follow the official feeding chart week by week

Official feeding chart

Weeks 1–2 (rooting): EC 1.4 – 1.6
Weeks 3–6 (vegetative): EC 1.6 – 2.0
Weeks 7–10 (flowering): EC 2.0 – 2.2
Tank change: Fresh tank every week

Doses and targets come from the official Vitaponix feeding chart. Vitaponix nutrients are plant nutrition, not pesticides or fungicides.

Prevent it next time

Get the full 10-week feeding schedule.

Open the feeding chart Shop Vitaponix →