Outdoor plant with leaf edges turning brown

[elliot]

This is a seven week old plant in a potted outdoor environment. Up to recently, no issues at all. For the past week, sunny 90°+ days until yesterdays tropical storm. Back up around 90° today.
I’ve been using stored rainwater for watering.
It came on pretty suddenly…Two or three days ago, I noticed brown tips with yellowing edges on leaves. Now edges are brown as well.
Could this be heat stress, a nutritional deficiency or over abundance?
Tomorrow, I plan to add a seaweed/kelp treatment to aid if heat is an issue.

The symptoms can mean so many things, any incite to this issue would be greatly appreciated.
Stay safe and be well…elliot

[Covertgrower]

Nutrient burn.

[jetlag]

Yep, newbie here and my Gorilla glue autos have done the same, and 95+F to help as well!! Yesterday I flushed them with FF Sledgehammer. Runoff was in the 500PPM range, so hopefully I did well.

[Cannabian]

Due to the dark green nature and the burned tips, I would think maybe a tad rich in the N department?

[Drinkslinger]

Can you fill out a support ticket?

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