Yellowing leaves at the bottom slowly moving up

Hey I have 6 plants and one of them seems to be yellowing on the lower leaves and has slowly crept up to a new set. The top fan leaves aren’t doing this. They have been flowering for about 18 days and the other plants aren’t yellowing at the base. Any advice or help is welcome

that plant might just be sucking up more nitrogen than the other ones. they love nitrogen during that 12/12 stretch. im not 100% and im sure other will give you some better answers

I too say, nitrogen deficiency. Its a myth, to cut nitrogen during flowering.

I used fox farm ocean forest in a small container from seed and after I think two weeks transplanted into 5 gallon buckets with new ocean forest and didn’t feed since I figured it had enough nutrients. Vegged 28 days and then switched to 12/12 and didn’t feed until 10 days in (fed low amount 1/4 instructions of fox farms tiger bloom and big bloom). Have I been starving them?

Sounds like I need to up the nutrients

jimihendrix1 said:

I too say, nitrogen deficiency. Its a myth, to cut nitrogen during flowering.

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I cut back nitrogen around 4th week of flower

MrGold said:

I used fox farm ocean forest in a small container from seed and after I think two weeks transplanted into 5 gallon buckets with new ocean forest and didn’t feed since I figured it had enough nutrients. Vegged 28 days and then switched to 12/12 and didn’t feed until 10 days in (fed low amount 1/4 instructions of fox farms tiger bloom and big bloom). Have I been starving them?

Sounds like I need to up the nutrients

Click to expand...

No red or purple stems there not that starved

MrGold said:

Hey I have 6 plants and one of them seems to be yellowing on the lower leaves and has slowly crept up to a new set. The top fan leaves aren’t doing this. They have been flowering for about 18 days and the other plants aren’t yellowing at the base. Any advice or help is welcome

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Slight potassium deficiency top right on the leaf

I dont know if its necessarily upping the nutrients, other than upping some Nitrogen.

I myself like to have a .92-1-2 NPK Ratio. All through out the growing cycle. And I believe that switching to Bloom Nutrients ect, is a marketing gimmick, tog et you to spend more money.

While Ive not used the nutrients you are., Im pretty sure you are also supposed to use the Grow Big, with the other Big Bloom, and Tiger Bloom. This will give needed Nitrogen.

Going by tissue analysis, in an 8 weeks flowering strain, the plant should get an Ever Increasing Amount, of Everything, and then weeks 7, cut ALL nutrients back 25%, and the week before harvest, cut back another 25%.

All Nitrogen is to a Plant, is, is Protein. It makes no logical sense, to cut back Protein, when the plant is going to go through its biggest growth spurt, biggest chemical manufacturing ect. Protein/Nitrogen, is responsible for every metabolic process. Down to cell splitting/mitosis.

Nitrogen in Greek means... Of First Importance. Protein, is the most important of all the elements.

The main thing is. RATIO. Give it to much, and the plant gets to leafy, and can also hinder flowering. BUT, it does need a certain amount, and from what I read, it needs about 99% as much Nitrogen, as it does Phosphorus. And 2x the amount of Potassium.

Thank you everyone for the replies and wealth of knowledge you have provided it is definitely appreciated. I ended up going from 1/4 strength bloom nutes to 1/2 with the sole reason being I didn’t have anything with just nitrogen and they were thirsty at the time (I should have waited until I had something more nitrogen heavy)

3 out of 6 plants immediately yellowed the bottom set of leaves very pale yellow and they fell offa day later all the while the next set up yellowed. This has happened to a few sets of leaves on each of the 3 and I see a few burnt tips toward the top so I think the nutrients are too heavy for it. Does it absolutely require flushing or can I just give water for a while to help? Two waterings now and it may have slowed the progression up the fan leaves but I am not sure. The ones that fell off I removed so they aren’t shown in the photos

This plant seems to be struggling and am considering cutting it early due to the issue progressing up the fan leaves. They get these black spots on them and it is just barely starting on some fan leaves with trichomes on them. I do not want to smoke bud with black anything in it but does anyone know what this is? Should I chop now? I don’t think I can reverse or stop it. I know this plant isn’t even near finished just looking for opinions please

First of all check out the link and see if it collerates to your current issue

Secondly, those lower leaves in your original post could be due to two things.
1. They are getting so little light due to the height of the plant that they are not useful and being repurposed as food.
2. You weren't giving them enough food or the wrong food.

Are you following the nutrient guide for your nutrient?
Are you using tap or RO water?
Are you PHing your water properly and reliably?

That calcium deficiency sure looks like it fits what’s happening on that front left plant. Have been giving them tap water that I leave out for 24 hours (have heard it lets chlorine evaporate). Used fox farms ocean forest soil so I didn’t feed at all until they had stretched in flowering. Just figured it had enough food but I’m brand new to this so really not sure. When I did feed it was at 1/4 the instructions and then 1/2 and I fed every other watering so would be surprised if I overfed.

Really I just relaxed today had a few smokes and admired them because even though they are halfway or a bit more then halfway done….. they look better then everything I saw in dispensaries. These pictures are from yesterday and just glad I can finally grow. Have a good weekend everyone and thanks again for all the help

It's a P deficiency - plant is taking what it needs from lower leafs and will soon move upwards. Do not keep throwing N to correct issue. Happy growing

I use sunshine mix4 for a medium, also have 5 bales of bx Promix hp to try out next run. When I started using the fox farm line up, I struggled to keep the leaves green until harvest. I found the addition of cal mag very helpful.
Also you should look up the fox farm feeding chart. start out about 50% strength and see how they respond. The chart says feed every other watering. Try and read the plants for what they need, whether it’s a feeding or just plain water and don’t go just by the chart.