New Grower How to recover from nutrient burn from SOIL?

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Hi guys,

As you can see in my grow journal :https://www.autoflower.org/f44/firs...ts-dwarf-under-300w-led-36496.html#post686495 I've used a soil called Compo Sana Generic, which contains Black Peat, Perlite, and water-released NPK at N 300mg/l, P 360mg/l, K 420ml/l.

This brand of soil was recommeded to me by the seed bank, and it is supposed to cover the plant's nutrient needs until week 6. Then you can either feed with bloom nutes for 2 weeks or not. Actually I was told I may not need to add any nutrients at all.

To get to the point, I planted 4 seeds, 3 varieties: Northern Lights, AK-47 and Dwarf, all autos. The 2 Northern Lights are doing great, however troubles have started with the other two:

- At about the start of week 2 the Dwarf started showing signs of nute burn. At start of week 3 is was obvious all growth had stop. At the middle I transplanted it to a cup of pure soil (no nutes) and I am trying to revive it.
- Yesterday the AK-47 (which already has some trouble which seem like overwatering), showed signs of nutrient burn as well.

How can I recover from this? I asked via email my seed bank and they told me that all strains do not handle that kind of soil the same. They seem to think that if I am patient the AK will recover from the burn when it grows a few more leaves and starts using them nutes. Flushing should make matters worse, as the nutrients are already in the soil and are "activated" by water. In fact, I was adviced to cut the amount of water I give them by 30%.

The other obvious thing would be to try transplanting, but the AK was quite big, and should have a significant root system which I will damage.

Anyone else had the same problem ?
 
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