Lower yellow discoloration on bottom leaves even after N feeding

[420chef]

medium: 90% fox farm light warrior 10% fox farm ocean forest
ph run off 6.7
last feeding: fox farm grow big in 45ppm tap water
light cycle: 20/4
strain: fem ghs white rhino
lights: 90w led + 150w HPS
last feeding, 20 hours ago.. this coloring has been here since before this watering and thats why i gave it a N dose

any suggestions? the watering before that had a magi-cal 1/2 tsp dose in it.

 

[Kindman69]

For the time being I would foliage feed them with like magic green or something that contains MG. The symptoms look like a mg deficiency and a little over watering, but I'm not a soil guy. You want to take care of this well before flower, since the plant will lose all of the affected leafs.

 

[420chef]

thanks kindman69 +repped ya.
i'll try to foliar feed her, good idea.

 

[Mr. Greengenes]

Presumably, those Foxfarm soilmixes have nutrients already and I can see that the plants are no where near being rootbound. I can't imagine how they could be lacking in any nutrient. A small plant in a large pot is difficult, if not impossible to water accurately. Over and underwatering alternate as we try to compensate. Cannabis is tough and often manages to put on a good face even when stress is happening, especially water stress. It's common for a watering problem to be overlooked until it (kills some roots and) manifests itself as a deficiency, which is then treated. But, like I said, there's nutrients in the soil there aplenty. Personally, I'd repot those plants into a smaller (!) container with a better draining mix (sand, kitty litter, gravel etc., with the Foxfarm).

 

[EvilTwin]

420chef,
The Light Warrior, which comprises 90% of your mix, is a starter soil so is intentially low on nutrients. So you need to feed more. Since you already have deficiency symptoms of Mg, I'd include the "Maxi-cal" too. It'll take a week to totally resolve.
ET

 

[420chef]

+repped ya greengenes and eviltwin - thankyou for the advice.
the plants about 3 weeks old now
I wanted to go CoCo with this one.. if I repot into a 100% coco mix would i be able to feed heavily afterward?

 

[cellardweller]

it's not a question of "would" at that point. coco is just the vehicle or medium and offers nothing. You have to feed them.

 

[420chef]

thx for the quick answer cellard +rep

so i foliar fed em some magical from technoflora and we'll see how they do.. then their gonna get switched to coco because i've seen some amazing crops in it and i'd love to give coco a shot using the fox farm trio.

 

[psycho pirate]

That seems to happen a lot with the GHS White Rhino... I have grown a few of the WR's and they all did that with the lower leaves... I got to where I could slow it down but not stop it completely... I feed them Alaskan fish fertilizer in veg. (NPK 5-1-1) and they seem to like the heavy dose of N

 

[EvilTwin]

420chef,
White Widow and the strains that include it are prone to Magnesium deficiency. It's a known strain trait. So it's best to supplement Mg as soon as you start feeding. It's much easier to prevent then it is to cure once you have a full blown deficiency.

On the coco...make sure you do your homework. It's (or can be) a finicky medium. Needs flushing and pre-treatment before using and best to use coco nutes.
ET

 

[habeeb]

yellow at bottom can be a couple things

to much water AKA no air to roots
N def
old plant AKA natural cycle ( which you do not have)
couple others I cant remember


looks like not enough food, 10 % FFOF, why not 50-80% FFOF?

 

[hazy]

I think FF nutes are soil nutes. If you put them in coco, you'll need hydro nutes.

 

[EvilTwin]

I think FF nutes are soil nutes. If you put them in coco, you'll need hydro nutes.

Hi Hazy,
I'm just curious on your thinking here. The main difference between hydro and soil nutrients are the chelators that prevent flocculation while the nutrients are in solution in a res. If you hand mix and feed (no res) why couldn't you use soil nutes?

I ask for clarification...but also I've grown quite a few plants in coco using Peter's Professional and I know others who do the same.
ET