[TanzanianMagic]

Originally Posted by Flanagani89

Hey all. Hope everything is well.

So this year I have a guerrilla grow going with 16 plants (northeast). Strains are blue widow, dutch delight, ams, blueberry headband, and a few others.

Dug holes (20 - 25 gals each) and filled them with an organic mix in April (pro mix, happy frog, perlite, kelp, bone, and blood meal, tomato tone, gupsum and some greensand) Plants were started inside April 20th, put into holes around may 5th. Plants were sprayed with neem oil first every week or 2, then azatrol twice, then sm-90 a few times.

So, about 2 months ago I started to see these yellow spots appearing on some of the lower-mid leaves on only a few of my plants. Leaves would then turn yellow and die. This shit is pretty much throughout my entire garden now, some plant's have lost a ton of their lower leaves. I thought it was maybe a N def, so I top dressed with blood meal about a month ago. Didn't help. Last week I made a 1:1 mixture of high n guano and high p and top dressed each ond with 4 tablespoons. Checked on them today and it didn't help at all? Plants were drenched with a AACT 2 times a week for the past month as well (guanos, bio weed, compost, molasass) didnt help either..

They are definitely getting worse. A few of my plants are starting to lose that healthly dark green color and change to a pale green.

It's getting to the point now when I'm getting extremely frustrated when I go to check on them... I've tried everything I can think of however nothing seems to help...

Could it be a pH issue? I thought you don't have to worry about pH with organics?

Please is anyone has any input at all I'll be grateful. Hopefully pics do it justice.

Thanks.

Looks like they hit mid-flower and ran into the usual extra need of PK and Mg.

I know this was last year, however if his occurs again, just feed with ripening and a magnesium source like epsom salt. Not a lot, just an addition to their base nutrients (which are already in the ground in this case).

They need a base feed (say 5-5-5) and then extra nutrients depending on their phase of growth. Which should be:

Seedling: p/k
Vegging: n
pre-flowering: P, Mg
mid-flowering onwards through ripening: K

[TanzanianMagic]

Someone who has the same idea:

https://www.youtube.com/watch?v=544dp-OMDVA

Dense Bud Compactor by Green Planet Nutrients - The Garden Sage 15
Green Planet Wholesale

And of course there is no need to buy potassium in a bottle. Wood ash, seaweed, molasses. Although it's interesting to see what a very high dose of potassium would do. It will be an interesting year.

[BMG]

If you use Promix or Happy frog outside I would assume that you would have to PH the water for that medium until your roots hit The Earth's soil and then it can accept regular rain water.. Just my 2 cents

[BMG]

How's everything going?

[BMG]

Don't loose your mind, it's just a very expensive weed and also you tend to make more mistakes when you're not thinking straight!

[TanzanianMagic]

Originally Posted by Flanagani89

Please is anyone has any input at all I'll be grateful. Hopefully pics do it justice. Thanks.

It looks like typical magnesium deficiency in early flowering.

From the earliest pre-flowers showing up onward, cannabis needs a boost of phosphorus and magnesium.

From mid-flowering onwards, it needs a boost of potassium.

CalMag, Maerl or magnesium lime, espom salt (MgSO4).

I think a foliar spray solution of epsom salt would be the quickest acting.

[Cannabologist]

This is a funny thread.

The plant in qtuestion looks like it has a hos of deficiency; most prominent is Mg, but also N and K are deficient, and likely micronutrients like iron. The recommended course of action would be a soluble fertilizer drench with adequate levels of all elements added slowly to correct deficiencies.

[slownickel]

Originally Posted by Flanagani89

Thanks again rather lately for all who offered advice

Flan,

Your P was low all along the way. Quite clear in the photos.

When you see what looks like a Mg issue, quite often it is a P problem. Only apply Mg foliarly. It works just fine.