Even though they drink less, plants under LED still need the same total nutrition. Bump nutrient strength by 20–50% — the reduced watering frequency means fewer feeds, so the extra strength compensates and keeps growth charging.
Start at the lower end of the increase and watch the leaf tips. Slight tip burn means you've found the ceiling — back off 10% and you've dialled in your mix.
DM
Written by Dave Mills
30+ years growing hydroponically, 20+ years running his own hydroponics store, and 14 years designing and researching grow light spectrums. Regarded in the industry as a master grower, Dave brings deep knowledge of plant biology, nutrition and LED technology to every product.