help please

Hi guys.i am newbie grower.i started germinating my seeds last march 21. I started with 3 vision seeds northern lights auto flowering strain and 3 dutch passion power plant.from the 3 northen lights 1 germinated and for the power plant 2 germinated.i transplanted them to a bigger pot 1 week after.everything was going well inside my grow tent.temp at a constant 29.5 Celcius,18/6 lighting on an 400w hps light system and a humidity of 55-60%.potting soil has a ph of 6.5-7. Started 1/4 of the recommended serving for the buddha grow fertilizer.I followed every step i learned when i was researching before i started planting.i thought i got all the bases covered but 3 weeks after they stopped growing,end of leaves are getting crisp and brown and the remaining leaves are turning yellow.i dont know whats wrong with my plants.hope someone could help me save my plants.

Some pics will help out alot.

What soil are you using and how is the drainage?

wyteberrywidow is right, pictures would be great!!

Here are the pics.what im using is an organic mix of potting soil for indoor plants. Thanks for the reply

wyteberrywidow said:

Some pics will help out alot.

What soil are you using and how is the drainage?

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Just attached the pics.drainage is fine but the only thing i think i might have done is over watering them.i use to water them everyday with about 150ml of water everyday since the topsoil gets pretty dry everyday.but have stopped watering since 4 days ago and have placed the plants on a 24hr lighting.

Looks like an extreme nutr burn .. If flush soil with ph'd water and stop all frets until a full recovery . Just my opinion though .

How close to the light are they ?? If closer then 16 inch raise it up ..

Chris323 said:

Looks like an extreme nutr burn .. If flush soil with ph'd water and stop all frets until a full recovery . Just my opinion though .

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Thanks for your reply.took them outdoor first for natural ventilation and light.havent watered them since 4 days ago.but the last 2 days of watering they were watered with only water

Chris323 said:

How close to the light are they ?? If closer then 16 inch raise it up ..

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Lights are about 2 feet away from them.should i bring them back to their grow tent with the 24 hr lighting or should i leave them outdoors until they recover?they so small compared to the other 24 day plants ive seen online

I'd bring them back inside ..of the soil is dry all the way through give them a little water but don't over due it. They like there water but the roots need to breath..

Chris323 said:

I'd bring them back inside ..of the soil is dry all the way through give them a little water but don't over due it. They like there water but the roots need to breath..

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Thank you

How about the lighting?should i keep them back on 18/6 or should i keep the 24/7?im really concerned about their size.

I have never given my plants a 24 cycle so I cant really say too much about that. But seeing as they were outside it may be a good idea to go 18/6

Chris323 said:

I have never given my plants a 24 cycle so I cant really say too much about that. But seeing as they were outside it may be a good idea to go 18/6

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Thank you.

Chris323 said:

wyteberrywidow is right, pictures would be great!!

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Here are the pictures

your temps look good from the last pictures .. the only thing I could think of from looking at the pic is perhaps lifting the light up a few more inches (6" or so should be good)

Chris323 said:

your temps look good from the last pictures .. the only thing I could think of from looking at the pic is perhaps lifting the light up a few more inches (6" or so should be good)

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Will do that. Did a ph check on the soil and it came out to 6.3. Thanks!