WWe are going to need a little more info if you want help
Join us here on forum and please fill this out
Relax the plant isnt doomed and we can correct any issue you may be having
I suggest you join and open a new thread in beginners section so you het more help
It’s normal for new growth to be lighter
The yellow tip is a early sign of nutrient burn
Fill out following with as much info as you can
COPY/PASTE the below list into your forum post.
Answer these simple questions the best you can.
If you do not know, or do not use something; Just say so = NA
Strain; Type, Bag seed, or NA
Soil in pots, Hydroponic, or Coco?
PH of runoff or solution in reservoir?
What is strength of nutrient mix? EC, or TDS
Indoor or Outdoor
Light system, size?
Temps; Day, Night
Humidity; Day, Night
Ventilation system; Yes, No, Size
AC, Humidifier, De-humidifier,
Co2; Yes, No
If you can, upload a picture of your plant. It helps the diagnosis, if needed.
Add anything else you feel would help us give you a most informed answer. Feel free to elaborate, but short, to the point questions and facts will help us help you