What did I do to my plants?!

well shit. My plants aren't looking too great. It hit 90 degrees in my grow space this weekend, does that play a role in why the bottom leaves seem to be going yellow then getting "crispy," and dying? This one is week 5 from seed

Lower leaves suffer nitrogen deficency.
By the way, those upper leaves are extremely green which is often caused by overwaterig. Do you use fertilizer? How often do you water?

Fender Guitar said:

Lower leaves suffer nitrogen deficency.
By the way, those upper leaves are extremely green which is often caused by overwaterig. Do you use fertilizer? How often do you water?

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I have only been watering once a week. I don't use any fertilizer, just what is in the soil (black gold organic). I haven't watered all the plants today, only 2 so far. Do you think I should not water them today?

Use your finger to check soil moisture and water once soil is dry one inch down(to your first knuckle).

And as for yellow bottom leaves, i dont know what the cause is. Maybe some kind of nutrient lock out in the root zone.

Fender Guitar said:

Use your finger to check soil moisture and water once soil is dry one inch down(to your first knuckle).

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Oh yes it was dry dry many inches deep in the soil. Could I be not watering enough, for how warm it got in my grow area this weekend?

Too much N and not enough light

AimAim said:

Too much N and not enough light

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Thanks! I have a 600w LED arriving tomorrow morning. Hope that will be sufficient for now. I only have two 300w LEDs on them right now.

The soil could be too "hot", causing nitrogen toxicity. What do you all think?

Fender Guitar said:

The soil could be too "hot", causing nitrogen toxicity. What do you all think?

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the soil did feel pretty warm. What can i do about that?

ladywolf said:

I have only been watering once a week. I don't use any fertilizer, just what is in the soil (black gold organic). I haven't watered all the plants today, only 2 so far. Do you think I should not water them today?

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If you are watering more than once every 3-4 days you are overwatering.

This depending on the fact you have a vigorous plant, in a properly sized container.

Soil needs to dry out thoroughly between waterings, like bone dry to the point of wilting.

No i mean the soil maybe contain too much nutrients.

Fender Guitar said:

No i mean the soil maybe contain too much nutrients.

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Is there anything I can do?

My young plants got overfertilized once because i used soil that contained way to much fertilizer. The soil was intended for older plants and burned the hell out of the youngsters. Never used black gold so i dont know how strong it is.

If too strong soil is the case, just wait it out. Plants will recover as the grow older.

ladywolf said:

the soil did feel pretty warm. What can i do about that?

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Not actual temperature. "Hot" means overfertilized.

Hang in there !

Thank you both! I hope the extra light will help out too.

Get the temperature under control, avoid under and overwatering, give plants lots of light, and do not add supplemental fertilizer. Give it some time and your plants should be a lot healthier