What’s That Saying?...you Can Lead A Sprout To Water But You Can’t Make It Drink...?

DC1 said:

I have 10 solo cup 3.5 day old sprouts, under a mars II 1600 on just veg (pulling 480w from wall). 4x4x6.5’ tent. I started with the light as high as possible (62” ish) and they sprouted up just fine. 3.5 days in and they look healthy to me (but I’m new). I started gently spraying the surface of the coco coir every 2-3 hrs...but i has to stop because the moisture is continuing to stay in the medium.

At day 3.5 I now have the light 52.5” away from “canopy”

Thoughts?

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Wee Zard said:

hat looks good so far. Stop spraying for a while. Plants use less water under LEDs. There is no radiated heat, so they transpire less.
Safest way is to fill a cup with dry medium and weigh it.
A postal scale works well. then wet the medium and weigh it again. My 16 oz cups go from about 4.9 to 6.6.
So when they get < 5.2 I water to runoff. About an ounce of PH'ed water each.
That is working well.
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