Yellowing Leaves like this natural for flowering?

The PH for my water is 7.2.
I am using the Roots Organic Nutrients Line and following the chart thoroughly.

I just started using Roots Organic Soil but with the plant that is having this problem, the soil is Fox Farm Ocean Forest..

Every other day I alternate between watering and feeding. The plant is very healthy but the fan leaves are yellowing
starting from the very bottom. Once the leaves are completely yellow or mostly yellow i pluck them off but I don't want it to keep progressing towards the top of the plant..

It's about half-way at this point.. is it natural.. will it just stop itself or what do I need to do?

The lady at the hydro shop told me its possible that it is due to lack of light penetration.. I am using a 250w HPS 12/12 for the flowering tent.

That looks like straight up N deficiency. Don't cut off N just because you're in flowering, give the plant what it asks for. It will want lots of N especially in the first 2 weeks of flowering.

Lack of light penetration will not cause lower leaves to turn yellow and fall off, especially with the top of the plant looking so good.. Great plants btw.

N deficiency and 7.2 ph is too hight! ur water should be 6.5! pH problems can cause nutes lockout!

PH is high. Is that after you add nutes ? If so that is way too high for flowering

Is it yellowing from the outside of the edge of the leaf in ? Nitrogen defiency.
Or is it yellowing from the center of the leaf out ? Phosphate defiency.

It could be light penetration..but you seem to have enough. 250 should be enough for one plant.

it looks like its starting more from the center as round yellow blotches.. the PH is 7.2 from the tap then I add in the nutrients from the roots organic line.. I give it everything the chart suggests starting from week 2..

how do I fix this?

Plants with P or K deficiency won't have such an even yellow like that.

Only N deficiency causes lower leafs to fall off that pretty looking.

You get a ph meter ,adjusters and make it 6.5 every watering and feed.

alrght i have a ph meter.. im wondering how i can measure the soil after? or would i just measure the nutrient mixure?
id like to try and stay away from chemical fertilizers and such.. maybe try an organic ph down alternative?

once the ph is down to 6.5 everything should be fixed?

It'll be better, but without extra N, the leaves will keep falling off.

I know some people say you can use vinegar or lemon juice for pH down, but stay away from that crap. Use a pH down based on either nitric acid, phosphoric acid. Lemon juice simply won't stabilize the pH or provide the soil with anything useful whereas nitric acid will give a tiny boost of nitrate and phosphoric acid will give a boost of phoshate.

Nitric acid is totally natural. It comes from the sky when we burn lots of hydrocarbons!

TheWhiteRabbit420 said:

alrght i have a ph meter.. im wondering how i can measure the soil after? or would i just measure the nutrient mixure?
id like to try and stay away from chemical fertilizers and such.. maybe try an organic ph down alternative?

once the ph is down to 6.5 everything should be fixed?

Click to expand...

awesome! thanks guys.. ill look into buying some nitric acid..
i am giving the plant all of its nutrients though.. for flowering i use each bottle of the roots organic line...grow, bloom, hpk, ancient amber, etc..
maybe the ph being too high is causing it so the nutrients arent properly being fed to the roots? cause i do give it nitrogen

It's just odd because normally a slightly high pH will show deficiency in immobile elements like Fe and Ca which affect the top of the plant, which your plant shows little or no symptoms of. I don't think high pH is causing the deficiency even if it is too high.

Ill post the results when i adjust the ph

I started to see the leaves towards the top with brown dots.
i watered them, ended up just buying some lemons. One lemon / gallon brought my ph down to 5.
the run off was 6.4..


I fed them and the nutrients were about 5.6... The run off was 7.2. I didn't put any lemon juice in with the nutrients since they measured to 5.6, next time I will so that the run off is lower.. I haven't seen any further deficiencies.

My actual tap water is about 7.5-8.

i thought leafs fall natrually