Problem in flowering

**conrado** · 22-12-16, 12:54 PM

Hi guys

I´m having some problems in my grow and i cant figure out what can it be. I tried to look for similar pictures but i cant find out what problem im having.
Here´s the setup

Northern lights 34 days into flowering (84 days total from seed)
11lts pot with composana soil
Tap water at 6.5ph after 24h resting / Water 2 days a week aprox. 2lts each time
.60x.60x1.4 grow with 250w hps at 20/30cm from top of plants
Temp: Máx 25 Min 14
Humi: Máx 70 Min 35
Extraction: Blauberg 150mm
Intraction: Pc Fan 120mm
Ventilation: 1 clip fan
Feeding: Biobloom and topmax (Biobizz) Bud Candy and Sensyzim (AN)

Found this problem one week ago. The bottom leaves start yellowing fast and have some strange spots. I think the yellowing its normal right? The problem is that its yellowing too fast. The rusty spots i cant figure out what can be.

Any help?

Thanks

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**conrado** · 27-12-16, 10:07 AM

Any ideas? I really dont know what to do... Its getting worst!

**happyjack** · 27-12-16, 10:15 AM

temps are going to low humidity to high

Viz · 27-12-16, 12:15 PM

When you switched to your 12/12 flowering light cycle did you give your girls an extra few feeds of Nitrogen? During the two weeks of stretch that happens after the change to the flower light cycle your plants will still need Nitrogen. The colour paling of the leaves really looks like they are Nitrogen depleted. Add some grow feed to your next feed and monitor. Just because you are in flower does not mean that the plants are not using Nitrogen, or that they do not need Nitrogen.

**conrado** · 27-12-16, 01:01 PM

I always feed them with 1ml/lt of biogrow.

I have been searching and found this:

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TOXIC SALTS BUILDUP

The image of the leaf is just like mine. Is this possible growing organic?

Viz · 27-12-16, 01:03 PM

Yes that is possible. And there is an easy fix for that. A good flush will help shift the build up of salts that can cause nute lock.

I would add a table spoon of Epson Salts to a gallon of water and flush with that to 40% run off. The Epson salts acts as a cheleting agent and will have break down the build up if that is the case.