Outdoor Needing Urgent Help

[Bl4d3]

So I came home today to see all 4 seedlings looking good.

I came back an hour later and saw 1 has wilted. It completely fell over and started dying.
I quickly moved it into the shade, checked the soil and it was dry. It was quite a warm day today.

I watered all 4 plants and hoped that was the last.
I checked on the plants every 30min and another wilted.

I jumped and moved the plants to my grow tent to have more control (LED Light on the way).
I went to the shop and bought some cable, fittings, plugs and 9W LED bulbs as a temporary solution.

I just checked again and now there is a chunk out of the one wilted leaf.
I looked closer and noticed some aphids. I sprayed each plant down with a mixture of Neem Oil, dish soap and water.

Guys, im stressing here. These are all Dinefem Critical + 2.0 Autos and this is my 2nd grow.
Have I missed something? What can I do?
I dont know if its heat stress, lack of water, maybe over watering when I watered them now or if its the aphids.

I've attached images. The one with burnt leaves sprouted like that so I'm not overly concerned about that one.

 

[Waira]

what are they in for soil? that dry-out is a killer mate, that cannot happen or the tap root taps out!
-- broken leaf looks like physical damage, not bugs,.. but the one seedling with the bug on it that looks like a mite to me, not an aphid... Doesn't look like a pest mite, could be a soil mite, harmless but either way, they aren't behind any of this,....

 

[Bl4d3]

The soil worked well in my previous grow.
I am going to go buy this on the weekend : https://hydroponic.co.za/hydroponics/promix-coco-perlite-90-10/

I think the plants suffered too much and wont recover. Time to buy more seeds

 

[mikey2017]

Looks like the middle one may make it and the soil is to hot for them to me..

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