White Widow Auto Lower leaves problem

[Mr. Red]

The plant is in Ocean Forest soil under a Mars 900 light. One month old and lower leaves turning yellow. No nutes added yet, Advice appreciated

 

[FullDuplex]

Simply feed it, and honestly be careful bringing that thing in and out of an indoor grow this time of year. Therps and aphids can gather rather quickly.

She does look pretty stellar though...

 

[Waira]

--- yes, OF is fairly rich, sometimes too hot for seedlings, but an older plant like this will still need a good fertilizer for complete nutrition, which that soil is lacking... especially micronutrients! ... symptoms look like N and P defc. starting,... how old is she? Looks like bloom may start soon,... I'd consider making a mild concentration blend of grow and bloom nutes, to make up for what's been lacking over time,... let us know what you have and we'll dial in a dosage!

 

[Mr. Red]

Thank you for help. I have the 3 main Fox Farm nutrients but have not used any yet. Also, I have just added 1/2 tea spoon/gallon of Cal Mag Plus. Which of the should I use and how much and how about Cal Mag applications?

 

[Waira]

..you have Grow Big, Tiger Bloom and Big Bloom? ..try mixing the first round at 1/4 strength, just to be safe, Grow and Tiger combined... Big Bloom is poorly named, if you look at the NPK#'s, you'll see that they're in the decimal range, super mild,.. I treat it as a supplement, not a true fertilizer, it's just too weak,... but it's great stuff! Apply that at recommended rates,... Ca-Mg depends on how hard you water is,.. any TDS/EC readings? pH can give a hint too,..basically, the more mineral content in your water, the less Ca-Mg you should use, unless there's an actual defc. issue,....

 

[Mr. Red]

UPDATE: I applied the 25% strength as directed and remain concerned about the low yellow leaves. Please see photos and advise. Thank you very much. These plants are growing outside.

 

[Waira]

..keep feeding, and raise the dosage to 1/2 strength, and stay on the even blend for a couple more rounds; then switch to full bloom nutes; Tiger has a fair amount of N in it as is,... It'll take a few days to see halting of symptoms, and this first round isn't enough; low dosage is to avoid potential burning, easing into it,... Most symptoms likely won't reverse at this stage, and besides, the lowers go first during bloom, it's normal,... they look good otherwise!