Nitrogen deficiency? Something else? Dont worry, very detailed with picutres, not trying to waste anyones time.

[JoeBlow5823]

First time Ive had issues like this. The plants are all various sizes, some seed some clone. They are pretty well matched to the amount of dirt they each have (all dry out right about the same time). The biggest two in the back are in 5 gallons, the two big clones in 3.5 gallons, the two small clones in 1.5 gallons, the little experiment in front is a seed sprouted at 12/12 in a 1 gallon, and the autoflower on the bottom right... dont worry about that abomination.

5x5 tent. 1000w HPS. 20 days since the 12/12 flip. Canopy never gets over 82 degrees but thats pretty much just the tallest tops, 95% of the canopy stays at 76-79.

Up until now I have only given them de chlorinated tap water and silica (ph to 6.5). This morning I top dressed them all with 5-5-5 (the light green/yellowing girls got a lot more than the rest, about a cup for them and 1/4 cup or less for the rest) and I watered with molasses, cal mag, silica, and beneficial bacteria.

The few leaves that have burnt edges have been burnt for a few weeks, i think the soil was a little hot when i transplanted the last time but no I'm thinking they have depleted most of the nutrients in it. I know it will keep producing more nutrients as time goes on but I get the feeling its not enough for these hungry girls.

Any advice would be greatly appreciated.


3 days ago


These are the two I'm most concerned about



As you can see the bottom right plant (small clone in 1.5 gallon) is looking very healthy and the one to the left is looking very light green.



This is the dirt they are growing in



This is a top from one of the less healthy looking girls. (Archive seeds- Rose Gold)



And this is the healthiest girl (AK)

 

[spek9]

Nitrogen deficiency starts from the bottom of the plant, as its a mobile nutrient. That means that the plant can move the nutrient from old leaves for use in new growth. The oldest leaves are sacrificed first. Immobile nutrients (eg. Iron, Zinc etc) are immobile, meaning they can't be moved around, and deficiencies with these always show up at the top of the plant (new growth).

So I'd say it's not N def.

To be honest, I don't see a problem. Some of my plants, even the same strain grow out slightly different colours. I'm not saying there isn't an issue, it's just that I can't see one in your pics.

 

[JoeBlow5823]

Nitrogen deficiency starts from the bottom of the plant, as its a mobile nutrient. That means that the plant can move the nutrient from old leaves for use in new growth. The oldest leaves are sacrificed first. Immobile nutrients (eg. Iron, Zinc etc) are immobile, meaning they can't be moved around, and deficiencies with these always show up at the top of the plant (new growth).

So I'd say it's not N def.

To be honest, I don't see a problem. Some of my plants, even the same strain grow out slightly different colours. I'm not saying there isn't an issue, it's just that I can't see one in your pics.

The one in the back right of this pic is still the one in the back right of the first pic I posted. She was super dark green her whole life but now the entire plant has gotten much lighter over the last 2-3 weeks. The clones generally have less vegetation and Im thinking thats why they are still a nice dark green.



Hopefully I didnt fuck them up with the nutrient blast I gave them this morning. Its slow release so they should be ok. I guess if they get better, I did a good thing. If they dont, i learned a lesson.

 

[youraveragehorticulturist]

Like you, I grow in soil and my plants usually start to fade, getting that lime green color about 3-4 weeks into flower. Healthy plants get hungry.

Lately I've been top dressing 3-9-4 flower fertilizer two weeks into flower so that stuff has worked it's way in and started to feed the plants in time to head off the fading.

Some molasses (with magnesium and potassium, like in the product Terpinator) can be useful in flower but too much can make your leaves yellow and drop off real quick. I use like 1-2 teaspoons per gallon once during week 5 and once more sometime during week 7.

 

[JoeBlow5823]

Like you, I grow in soil and my plants usually start to fade, getting that lime green color about 3-4 weeks into flower. Healthy plants get hungry.

Lately I've been top dressing 3-9-4 flower fertilizer two weeks into flower so that stuff has worked it's way in and started to feed the plants in time to head off the fading.

Some molasses (with magnesium and potassium, like in the product Terpinator) can be useful in flower but too much can make your leaves yellow and drop off real quick. I use like 1-2 teaspoons per gallon once during week 5 and once more sometime during week 7.

Yeah my thought process is that the girls grown from seed have a lot more foliage and are using up N faster than the life in the soil is creating it. I feel like as new growth happens, the plant is pulling some N from old growth and "shorting" the new growth a bit at the same time giving them that overall faded look. Next top dress with be a bloom ratio closer to the one you use, i just hit them with the 555 because they look hungry from some N. I did right around 2 tsp/gallon so I think I'm safe there. Just have to wait and see how things go now.