First off, I'm using a power-grower under 600 watt hps hortilux. Temps shouldn't be a problem, they stay around 70-80 degrees night and day. I'm using Pure Blend Pro @ 1200ppm. The plants right now are almost four weeks old and they seem to droop during the dark cycle and the stretch straight up during the light cycle. There are no signs of nutrient burn and the leaves are a steady green color.

So I guess my question is, why are they drooping at night? Should I put the water dripper on a timer, too? That's the only thing I can think of.

-- Spooks

__________________
It is what it is

I'm no expert; but don't plants stretch only to the light? They'll also move and bend to follow it...

Maybe they are sleeping?

I'm going to check mine during the night now. No, second thought... I wouldn't want to disturb them.

Mine do the same thing. They are just resting. If the lights are on and they droop then I would think they were not happy.

__________________
New to growing? Click Here. This thread will help answer 90% of your questions.

i know it's an old post but this is just for readers trying to gather info. Think of a normal flower. At night there is no sunlight so the flowers close. During the day there is lots of sun so the plants are reaching for the light. To be reaching all night with no sun light for uses up the plants energy. thats why they droop at night.