Mag deficiency? Nitrogen tox/def??

[Cwmoore577]

I posted here not long ago and a few people suggested nitrogen toxicity was my issue. I have cut off all nutrient solution to see if it recovered. New growth showing same problems as shown in the picture, yellowing between the veins, yellowing and browning in old growth and curling.

Using a 600w full spec led light, 18-6 photoperiod. Watering with distilled water every other day to every 3rd day ph 6.3-6.8. In foxfarm Ocean Forest soil, no added nutes for the first 3 1/2 weeks. Gave a low dose (2 tsp per gal) of General Organics BioThrive Grow (NPK 4-3-3) twice to see how it would react. Have given none since week 5 when I noticed the curling and yellowing and they are 7 weeks currently.

Could the soil be hot causing tox? Should I flush? Or could it be a deficiency? Any help greatly appreciated it’s one of only 3 females in this crop and I’m hoping to correct this issue ASAP.

 

[Merlin1147]

Looks like a Mg deficiency.

 

[Herb & Suds]

Uhm pretty sure you suggested N toxicity
Seems I read your post wrong?

 

[Cwmoore577]

Uhm pretty sure you suggested N toxicity
Seems I read your post wrong?

My prior post had someone suggest that it was nitrogen tox so I cut nutes for two and 1/2 weeks and only watered with pure distilled. Did not seem to help and new growth still showing signs of it. Which means either soil is hot or it’s something else. Just trying to get more insight and opinions.

 

[Cwmoore577]

Also remembered this plant is in foxfarm strawberry fields and not Ocean Forest. Also bought cal mag supplement and added some to it at half dose (2.5ml per gallon)

 

[hotrodharley]

My prior post had someone suggest that it was nitrogen tox so I cut nutes for two and 1/2 weeks and only watered with pure distilled. Did not seem to help and new growth still showing signs of it. Which means either soil is hot or it’s something else. Just trying to get more insight and opinions.

Watered only. With distilled water. There’s a start to explaining the present situation. If nitrogen excess you cut or reduce nitrogen. You don’t close the entire buffet.

 

[SPLFreak808]

Post up your watering habbits and try to explain how far you take the dry & wet cycle, are you letting that pot completely dry out?

 

[Neubieauto]

I'd throw it some Epsom salts and see if that helps. My plants used to get like this and some Epsom salts typically stops the progression. I pre amend against it now lol and haven't seen it in a few runs. Just my very humble opinion.

 

[Cwmoore577]

Watered only. With distilled water. There’s a start to explaining the present situation. If nitrogen excess you cut or reduce nitrogen. You don’t close the entire buffet.

They were also transferred into new soil as well. And I was already giving a very low dose to begin with. Was going to resume nutes 3 weeks out from the transfer. Should I resume anyway?

 

[Cwmoore577]

I'd throw it some Epsom salts and see if that helps. My plants used to get like this and some Epsom salts typically stops the progression. I pre amend against it now lol and haven't seen it in a few runs. Just my very humble opinion.

I’ve given it a dose of calmag supplement to see what happens. Waiting to see. Thanks for your input!

 

[Cwmoore577]

Post up your watering habbits and try to explain how far you take the dry & wet cycle, are you letting that pot completely dry out?

I’ve got them written out in a journal. I’ve been watering once every 3rd or 4th day for about 3 weeks now. Trying to let it dry more and getting used to the weight of the containers. For the first 3-4 weeks I watered every 2nd to 3rd day.

 

[Neubieauto]

I’ve given it a dose of calmag supplement to see what happens. Waiting to see. Thanks for your input!

If this does help keep in mind it won't reverse damage already done of course. Just stops the progression. When I had this problem, after treating them If I felt like the progression had stopped I would pluck those dead leaves and watch the next couple sets of fan leaves up from them and if they stay green you're good to go.