Brown spot on the main stalk

[JounesGrower]

his is my first grow, I'm very worried,

today i saw brown spot on the main stalk upper part. this is an auto-flower 29 days old, organic soil, I really don’t know what is wrong with it. she used to be happy now she’s kinda droopy a little bit and slow grow.

I have another auto, she looks good and happy, I’ve been watering them both at the same time

i water the plant every two days with little water because I’m worried to overwater.

What is going on?

Please help me, what can i do?
Thank you

 

[Cannagus]

That may be pythium, aka root rot, can affect stalks as well. If it is your plant is probably boned, I'm not sure if there's any way out of pythium or not but early on, and on a stalk maybe. A few minutes exposure to UV light maybe, or possibly dabbing it with povidone iodine. Or you could do nothing, it may be nothing but if it's pythium you'll know that soon enough as the stalk rots and the top falls over. If you see it turning into an open rot spot pull it and pop another bean. Good luck