I lived in an old farm house that had ship lap board siding inside and out, the outside ran horizontal and the inside vertical. In the summer the wood dried out and shrunk, you could see out through he walls and the wind blew through until it rained and got foggy then it all tightened up. It got really cold one year before it ever rained and one morning I sat down on the toilet to do my business and my ass froze to the plastic seat. I had to wait a few minutes for it to thaw........ to get up.
When I would mix the nutrients the PPMs did not match what I was shooting for because the formula was for 12 gallons and I was actually putting 14 in the container, so I fixed that. In some previous runs I was looking to see what the minimum N would do to a grow. I have learned I was going to low, so in order to bump up the N I needed to adjust the other nutrients to keep the balance I want. so yes I have been all over the map but look at the results now.
These pictures are with 5000K light and no photoshop. They are a little droopy because I turned the light on in the middle of their dark period to take the pictures.
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That is the color I am looking for in veg, The one Blackberry in the back is showing a tiny bit of too much N. It is hard to keep them all happy.
I use Yucca powder throughout the grow to keep that from happening in my rock wool, it also helps to keep the drippers clean.
ppp
