What is this?

[Hanzo-hattori]

What is this?

 

[Rev. Green Genes]

Hi Hanzo, we will need you to answer some questions before we can help. Here is a link to the patient form, just copy it in and let us know what you got there.

https://www.autoflower.org/threads/...ill-out-first-with-the-data-that-matta.45991/

 

[Hanzo-hattori]

Hi Hanzo, we will need you to answer some questions before we can help. Here is a link to the patient form, just copy it in and let us know what you got there.

https://www.autoflower.org/threads/...ill-out-first-with-the-data-that-matta.45991/

I’m on mobile and I’m not that techy I’ll do my best to give the most information.

Strain: blue dream auto around day 43
Medium: soil
Feed per L: sensi a+b bloom 2ml 1ml carbaload 1ml Big bud 1ml cal mag 1ml B-52
Temp avrg: 26c on 21off
Humidity avrg 70% (High I know I had it at 40-50% but dehumidifier and heat was causing major plant stress)
Light 600w hps
Problem middle leaves are affected yellowing and a browness following the veins of the leaves also purple stems trying to figure if it’s a cal mag issue or fungal

 

[Rev. Green Genes]

I’m on mobile and I’m not that techy I’ll do my best to give the most information.

Strain: blue dream auto around day 43
Medium: soil
Feed per L: sensi a+b bloom 2ml 1ml carbaload 1ml Big bud 1ml cal mag 1ml B-52
Temp avrg: 26c on 21off
Humidity avrg 70% (High I know I had it at 40-50% but dehumidifier and heat was causing major plant stress)
Light 600w hps
Problem middle leaves are affected yellowing and a browness following the veins of the leaves also purple stems trying to figure if it’s a cal mag issue or fungal

I was going to ask if they were purple or if that was just the lights. I would say she is one of two things, needing calcium is most likely. But it also can be pH problem. If you are able to do a soil pH test that would be great. Do you know the pH of your water or nutes? If you can't check pH, than I would try adding some calcium and micro nutes.

If you want to stay organic, try making an eggshell tea (crushed and dried, then soaked for a few days) If organic is not an issue, than try adding a bit of calmag.

 

[Hanzo-hattori]

I was going to ask if they were purple or if that was just the lights. I would say she is one of two things, needing calcium is most likely. But it also can be pH problem. If you are able to do a soil pH test that would be great. Do you know the pH of your water or nutes? If you can't check pH, than I would try adding some calcium and micro nutes.

If you want to stay organic, try making an eggshell tea (crushed and dried, then soaked for a few days) If organic is not an issue, than try adding a bit of calmag.

Well good news I suppose a lot better than rust anyway, I gave them a feed today so I’m just going to monitor her and if she gets worse I’m going to flush her with the last 5l having 10ml a+b and 5ml cal mag, sound good ?

 

[Hanzo-hattori]

@Rev. Green Genes also how long do you think I can maintain humidity 70-75% before serious issues ?

 

[Rev. Green Genes]

Humidity being up is not a problem unless you develop mold. That is usually found on large buds getting close to harvest time. If you cannot keep the humidity down than prune out all the fan leaves starting at the inside and bottom, and moving toward the top and outside of the canopy. This will increase airflow and help limit mold opportunity. You can also add a fan and that helps. The plant doesnt mind the humidity so much, they hate being too dry though!

As far as calmag goes, since we cannot be sure of your soil pH I would go lower with the calmag, maybe 2 ml. It can quickly cause pH shifts, and worsen your problem. It's a lot easier to add more than get it flushed out and pH sorted.

A good cheap dehumidifier technique is to put a big bowl of rice in the room, and every few days put in the sun to dry out (or low temp in an oven,) and return it to the room.

 

[Hanzo-hattori]

Humidity being up is not a problem unless you develop mold. That is usually found on large buds getting close to harvest time. If you cannot keep the humidity down than prune out all the fan leaves starting at the inside and bottom, and moving toward the top and outside of the canopy. This will increase airflow and help limit mold opportunity. You can also add a fan and that helps. The plant doesnt mind the humidity so much, they hate being too dry though!

As far as calmag goes, since we cannot be sure of your soil pH I would go lower with the calmag, maybe 2 ml. It can quickly cause pH shifts, and worsen your problem. It's a lot easier to add more than get it flushed out and pH sorted.

A good cheap dehumidifier technique is to put a big bowl of rice in the room, and every few days put in the sun to dry out (or low temp in an oven,) and return it to the room.

Thanks for the useful info, I have a good dehumidifier but when I get the RH down the plants start wilting I believe it’s due to 1) temps 2) the dehumidifier is sapping all moister from littler leaves and where it can’t rehydrate it’s wilting, but I mean with 70%rh Mold is almost a certainty so I’m at a cross roads

 

[Rev. Green Genes]

Thanks for the useful info, I have a good dehumidifier but when I get the RH down the plants start wilting I believe it’s due to 1) temps 2) the dehumidifier is sapping all moister from littler leaves and where it can’t rehydrate it’s wilting, but I mean with 70%rh Mold is almost a certainty so I’m at a cross roads

If they wilt, raise the light a bit and give a bit more water.

Mold is never good, but removing leaves and adding airflow usually prevents it pretty well. 70% RH is not that bad, unless it's a jungle in there with no air flow they usually pull through. If you are real concerned about mold, you can get some fungicide like serenade and brush it on the nodes and stems with a small paint brush. That should prevent it pretty well. Serenade is a bacterial fungicide, it eats the spores.

Mold usually gets on the stems at bud sites and once it germinates it spreads through the bud. You can't see it until it germinates, then as it spreads, it turns white and puffy and starts to come out of the bud where it will turn brown or black and eats up the bud before sending out spores to your whole room. So if you can prevent it, that's perfect. If it shows up and you catch it while it is still white, you can remove the plant before it effects others. If it gets to the brown stage your fucked. At that point you have to sterilize the whole room and all equipment.

 

[Waira]

thanks Rev.GG!

Hanzo- looks like Ca defc. to me,... that spotting along the veins and color loss is pretty tell-tale,... given your low level inputs of nute's, this is likely a lack-of... Don't flush! that's for serious pH and overfeeding problems mainly, neither of which are happening here,... Is this the same plant as the other thread? Purple petioles are not a reliable indicator of anything, so many express color normally this way,.. other things can promote this too besides nutrient issues,..... only as a co-symptom is it sorta useful...
...needs pic of the wilting leaves to figure that out, they won't do that unless maybe the dehumi' unit is blasting they directly,...