Yellowing 2 wks after start of feeding?

[Tx-Peanutt]

Looks like a magnesium deficiency

 

[Tom Tucker 313]

IMO, it's time to re-pot. While they're still an OK size for their containers, it's possible most of the needed nutrients are gone from the soil after six weeks. Putting them in a bigger container will do three things. 1, give them brand new soil to enjoy. 2, make adding fertilizer safer. The more medium you have, the less chance of overfeeding. 3, like the fertilizer the more medium you have to hold water the less chance you'll over/under do it.

I don't see any major problems. Before I took drastic steps I would replant them.

If your plant is suffering already why would you transplant and cause more stress?

 

[Tom Tucker 313]

Good info, thank you. I've been watering with about 8-10 ounces every other day for weeks but the yellowing is new. Pots are light and a moisture meter shows dry to the bottom of the pot after 2 days. Let me know if these pictures are good enough. Just got a lux meter, 27000 at the top of the plant.

Epsome salt every other watering until flower.

7.0 ph water for all nutes and waterings

18/6 veg
12/12 bloom
10/14 last two weeks

50% humidity with daily floral mistings with 7.0 ph h20

64F-75F temps starting low and gradually increasing until late flower than slowly decrease

Thats really all it takes. Dont use any expensive designer nutrients. Just high nitrogen for veg and high phosphorus for bloom and suppliment with a trace fertilizer.

 

[1212ham]

They weren't looking good when I got home last night. Working on the assumption of a deficiency, I transplanted to FF Ocean Forest in 3 gal. Smart Pots. No apparent transplant shock and they seem a little better today, time will tell. I also got a small warm mist humidifier in the tent.

I overlooked that I had increased the light level when I installed my new light build over a week ago. As ANC said, more light, more food.
Post #1806, http://rollitup.org/t/bridgelux-eb-series-build.928676/page-91.

A couple related threads..
https://www.rollitup.org/t/yellowing-lower-leaves.956738/
https://www.rollitup.org/t/what-causes-bottom-leaves-to-yellow-and-shrivel-up.956834/#post-14007312

 

[nobighurry]

Other than the time I dropped the plant onto the floor I have never suffered transplant shock, plants remain perky an usually have a growth spurt if I was a little late on up potting...

 

[1212ham]

Epsome salt will supply your plant with magnesium for photosynthesis and sulfur for water regulation. 7.0 ph h20 will stop any issues with acidity/alkalinity

Thanks, so much to learn! How much epsom salt and how often?

 

[Tom Tucker 313]

Thanks, so much to learn! How much epsom salt and how often?

15ml per gal every 3rd watering.