Leaves browning

Hi guys. I've noticed a couple of leaves on my autoflower plant starting to show brown spots/regions. I am growing in soil, temps are at around 21 celsius, humidity at around 50-55. Plant is watered once every 2-3 days with about 1,2 litres of water using the finger in soil technique. At the last watering I used a fertilizer for orchids with a NPK of 3-6-6. Here are some pics:






What do you think is the matter?

bit too much Nitrogen

Should I water now even though soil is still moist or wait for the next watering and give only water then?

labworld said:

wait for next watering and givr only water for a day or 2.

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Thanks

I don’t think I’d trust the finger in soil technique. Id go by weight of pot or slight sign of underwater.

OneMoreRip said:

I don’t think I’d trust the finger in soil technique. Id go by weight of pot or slight sign of underwater.

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Sweet Jesus he finally said something sensible.

Definitely a PH issue

OneMoreRip said:

I don’t think I’d trust the finger in soil technique. Id go by weight of pot or slight sign of underwater.

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But you trust sticking a ph pen into there?

I think I've watered with a good frequency actually. And I only use bottled water with a ph of 6

Do you guys think I should remove the affected leaves? I only see the two in the pictures so far