Same Old/New Problem

[Antony]

Hello friends,

Long time no see. I've been away for a year, now back with gear.

I'm facing an old issue that is happening again.

This girl is Dinafem Sour Deisel Auto, it is 37 days old. in biobizz all-mix. under 600hps. 20/4 light cycle.
The run-off water ph is around 6.4

I've been feeding them biobizz products (biogrow 1ml/L) + (bloom 1ml/L) + (topmax1ml/L).

Everything seemed great until a week ago... the plant stated to yellow from the bottom and getting to the top, little spots here and there and leafs started then to die and drop.

This girl has already lost lots of leafs this week, I have already tried all possible options. I had this problem before and couldn't fix it then lost couple of plants.

I have suspected N def, so I increased biogrow to 2.5 ml/L
I have also suspected Mg def, so I put 1 tbsp to 6 Litres of water
I have also increased bloom to 2.5 ml/L


Yet the problem is getting more complicated and leafs are getting more yellowish and dropping!!

I mean I have tried all possibilities. but all in vain. No time left.

What am I missing??

 

[stepside]

It doesn't look that bad to me. What's your nutes going in pH @?
Pluck the yellow ones. I've never grown that strain but I've had plants want more N right up till the end. Biogrow is GO right? If you go by the chart you just left the transition week what were you feeding week 4?

 

[Antony]

I can assure you it is getting worse. Pics have always been tricky. as mentioned above ph is around 6.4
and my feeding schedule is (biogrow 1ml/L) + (bloom 1ml/L) + (topmax1ml/L).
I have the same strain and age, yet no problems

 

[bad dragon bzzz]

as stepside said it dont look bad at all.bottom leaves tend to die off naturally.middle/top of the plant looks good though.
i suspect the allmix has maybe run out of its nutes and the 1ml of grow isnt enough.
i use the biobizz lightmix soil with biobizz nutes and at 37 days id be whanging in 5ml grow and maybe 2 of bloom.
dont do what i do im a gobshite,please seek further help.

 

[Bromeo]

Step back and look at the whole plant. It's not doing half bad. Have you tested the ph of your runoff? 6.4 is possibly a tad off for that girl. Try dropping to the 6.0 to 6.3 range.

 

[stepside]

Above you said the run off water is 6.4 what is the pH of liquid going into the soil?? I use GO as well and at 5 weeks I'm giving full strength 10ml bloom per gallon plus everything else. I think your plant may just be underfed in turn it's eating itself from the bottom up

 

[Waira]

... I agree, there's more than one thing happening here, but it's hardly a trainwreck, thankfully! :smoking:... overall yellowing, no dead spots/patches on lowers is N defc., some of which is normal for budding, but not quite this much so early,... other leaves show likely Mg defc. symptoms (interveinal chlorosis),.. that last leaf with mottled look and necrotic spots could be either K or P defc.,... Biobizz is pretty mild stuff, so depending on how frequently you feed, and the pot sizelant size ratio (lots of plant in a small pot), reserves can get depleted fast! As for the pH, Stepside called it right: if you didn't run this improved method and calculation, that pH measurement is suspect-- Straight run-off will not give an accurate in-medium pH reading...( https://www.autoflower.org/threads/...-for-run-off-testing-and-ph-estimation.41733/ )... run-off method in general is dubious, full of potential measurement errors, but this method helps remove some of them... best bet is an in-soil pH meter, like the Accurate 8... This aid, I don't think you have a pH lockoutissue, just a lack-of issue,...
... looks like you've taken some corrective actions already ,... it'll take a few days or so for things to start improving, especially with organic nutes, which have that breakdown time added as well, for the soil 'crobes to turn them into absorbable forms,... you can add some Grow nutes to get a little extra N in there, just mind the NKP numbers on all the collective inputs, to make sure the N value doesn't exceed the PK values! Now would be a good time to use a bloom booster with higher PK #'s,...

 

[Antony]

Thank you all guys. stepside you hit the spot many thanks.
pH of water going into soil is about 6.8 and runoff is 6.3-6.4
and comparing to everyone, I think I'm really underfeeding my girl, that's why it is eating itself.
I don't know what GO is! never heard of it. But I will increase my nutes a bit, and hope everything goes well

Peace

 

[Waira]

GO= General Organics...

 

[gantsa]

Thank you all guys. stepside you hit the spot many thanks.
pH of water going into soil is about 6.8 and runoff is 6.3-6.4
and comparing to everyone, I think I'm really underfeeding my girl, that's why it is eating itself.
I don't know what GO is! never heard of it. But I will increase my nutes a bit, and hope everything goes well

Peace

hello antony! did it work? was it nut deficiency?