Might want to add more perlite to your potting mix next time. Especially if in 5 gallon buckets. They'll retain moisture and you'll risk root rot. I drill 1/2" holes in the sides of the bucket(s) to help with moisture control.

What's your day/night temps?

Do you know what that particular soil is buffered to? Mulches are generally buffered between 5.5 and 6.0ish. Potting mixes are generally buffered to 6.8 to 7.0ish. If using a mulch, you'll be chasing the ph till harvest.

Purpling of the stems and petioles can be from a few different things. PO4 defeniency, temperatures, and phenotype of the strain are the biggest sources. Some strains do have purple genetics buried in their past, and this expression can pop-up once in a while.

Careful with any magnesium product. Overuse can and will lock-out nutrient uptake. (possible cause of the additional purpling?)

All organic is soooo overrated, but that's likely for another thread. :thumbsup:
Rusty Trichome Reviewed by Rusty Trichome on . Help a guy out please... Hello all... Me again. Having a problem with the crop. I dont know what it is. I am using a mix of Black Gold soils. All organic. Water is around 6ph. Under a 400w light about 20 inches to 24 inches off the canopy. They are in 5 gallon buckets. I use Humboldt Nutes all organic series. I think thats all the basics. As you can see from the pictures, The stems are a deep purple. The leaves are turning white starting from the middle of the leave by the veins. There was no new growth for a little Rating: 5