bottom leaves yellowing

[indicat33]

So we have 5 feminized plants in good home-made compost and have been using fish emulsion from germination. I recently switches to Earth Juice Bloom (contains 0 Nitrogen) and the small, bottom leaves have started yellowing. Should I give them a small dose of fish emulsion to replenish the nitrogen? They showed their 1-st pistils about a week ago. Can someone offer some sound advice? Here are some pics:

 

[indicat33]

Hard to take a decent pic with our new HPS being so bright Anyway, the plants are healthy for the most part. A few lower leaves are yellowing. Nitrogen transference? Not sure, that's why I'm posting - 2 Amnesia fem + 3 Durga Mata II fem @ 1 wk in.
PS- 3 seedlings in 20oz. cups: Skunk freebie, Hindu Kush, Afghani regular seeds. Going to use the best male to pollinate a couple of Paradise Seeds Durga Mata II we have going

 

[indicat33]

1 of our 3 Durga Mata II CBD plans.100% of the leaves are healthy on top, just a few yellowing on the very bottom. Pistils started a week ago. Should I give them Fish Emulsion (5-1-1) to supplement the Earth Juice Bloom (0-3-1) ? Trying to go all organic this run.

 

[workinit]

One school of thought is to keep the plants as green as possible til the very end. You do that with N. Your nutrients don't have a lot of K, are you supplementing with something else?

 

[a senile fungus]

Just learned about this, adjust the white balance on your camera for a more true color shot.

 

[Southerner]

I think it'd be cool to give em some N, it looks like the buds have a while to go.

 

[indicat33]

One school of thought is to keep the plants as green as possible til the very end. You do that with N. Your nutrients don't have a lot of K, are you supplementing with something else?

No, I'm only using earth juice (0-3-1) and have noticed yellowing on the bottom leaves. They are growing in rich compost and have been very green up until i switched from fish emulsion to earth juice. I guessing it's just N transference, but wanted to be sure my girls aren't being starved for nitrogen.

 

[Diabolical666]

N is a nessessity all the way up till 3 weeks before harvest. Bottom leaves yellowing is lack of mag. Once you have a deficiency of N. cal, mag its like a domino effect of lockouts of each other. If you didnt do anything to the plant eventually the signs of N def would start coming from the tops. N, cal , mag they want it now

 

[WestDenverPioneer]

N is a nessessity all the way up till 3 weeks before harvest. Bottom leaves yellowing is lack of mag. Once you have a deficiency of N. cal, mag its like a domino effect of lockouts of each other. If you didnt do anything to the plant eventually the signs of N def would start coming from the tops. N, cal , mag they want it now

This ^^^^^^^
Feed your plants.

 

[indicat33]

Thanks for the replies guys / I have some epsom salts handy for mag supplement that i just mixed with fish emulsion (5-1-1) and earth juice (0-3-1). I mixed both in equal proportions, with 1 Tbl.spoon Epsom Salts and bottom watered the plants today. Also, I switched over to my MH bulb (something i wanted to do anyway). I don't want to raise my light, so using the halide bulb allows me to run the lamp closer to the canopy.

 

[indicat33]

Top shoots under the 400w MH Lamp. As you can see, they look okay, and the actual yellowing is only present on the very bottom leaves. Just added Mg. in the form of epsom salts and we will see if that helps.

 

[indicat33]

As you can see, they're pretty healthy in general and Most tops are showing pistils . 5 plants total, feminized, all topped @ the 4th node, 12/12 from seed.