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Thanks for your input NF. I considered this was a lack of calcium, but the soil test indicated I had 3-4 times the recommended amount of Ca available. Seems like their recommendations could be off.

I'm about six weeks through flower with brand new living soil in 5 gallon pots and I've run into some nutrient deficiencies. Mostly just yellowing of lower/middle leaves which I'm not overly concerned with. But one plant has a different issue as shown in the photos below. What are your best...

Afghanimal extra frosty pheno just beginning to purple at 40 days...

Dolato early purple pheno at 39 days... Afghanimal chunky pheno at 39 days... Afghanimal extra frosty pheno at 39 days.... Dolato lanky sativa pheno beginning to purple up at 39 days...

Dolato at 38 days...

Dolato at 36 days...

Dolato at 34 days, one pheno already starting to purple up...

Some night shots of Afghanimal and Dolato at 33 days...

Oh that reminds me, do you all know if brewing sanitizer (Star San) is ok to use in place of bleach for sanitizing grow equipment? I hate using bleach b/c of the film it leaves behind. I figure brewing sanitizer would be a good option b/c it's designed to be clear rinsing as not to leave behind...

Thanks for the responses guys, I really appreciate it. @ShLUbY you mentioned the pH of your RO and the addition of air. That got me thinking about my RO reservoir. The pH of my tap water is about 8.5, running it through the RO system brings it down around 7.5. But I hadn't checked the pH of the...

Afghanimal and Dolato at 31 days...

Afghanimal and Dolato at 24 days...

Ah ok, sounds like gypsum is more pH neutral then? I didn't add any suffer, so it's probably a good idea to get some in there anyway. Here's the mix I followed, more complicated than it needs to be I now realize. Base mix: 6 gal organic soil mix 2 gal rinsed coco coir fiber 4 gal perlite 4 gal...

Thanks for the reply Strude. I'll have to measure the pH of my EWC, you've got me interested in that now. What's got me stumped is the unused soil (same mix) is right now sitting at a nice 6.3-6.5pH while the containers are up in the 7s. I'm really curious what would cause the pH in the...

Afghanimal & Dolato at 21 days...

Great tutorial!

Very very nice Nano. What's the effect like on this? Did you grow out many of the seeds, wondering what different phenos you might have found?

Hah...there's truth here. Yeah RD, the TLO book was a real eye opener for me as well. Now that I've spent more time researching and learning organic growing methods I'll be changing things up from the Rev's approach. But it's been a huge, huge step in getting things going with soil. Love that...

Thanks for your input RD, I've enjoyed your threads. I think you follow the TLO grow style? That's what I've got going here. Things are going well besides the pH issues. Good call on the topdressing. I topped with insect frass and EWC about 10 days ago. Things have certainly improved since...

Using the Blue Lab soil pen...which I've been calibrating often to make sure the readings are trustworthy.