Just looks like it needs more water. Hold off on nutes for another week at least in my opinion. OF soil is great and good for at least a month without extra nutes. I use same nutes and soil in my stuff. Water more frequently the bigger she gets.
Personally i would reconsider The blue mammoth.... This year i went with quixter and spyder. I bred the spyder with itself and now have f10 seeds. I just planted 20 spyders and one WW auto from dinafem today. Gonna breed it with my best male spyder. Good luck
Looking real good man. I just planted a WW auto seed in soil this morning along with 20 Spyders. I think i might pollinate her with a male Spyder. What lights are you using?
Now that i looked at the pic from a step back looking at whole box it looks like a heat issue. What is temp and humidity???? I have found thhat my plants can withstand higher temps if the humidity is higher. Low humidity+ high temp= bad news!
I'll bite. Overall they look good! My guess would be either underwatering or not enough light. You might need to water more than you think cuz they are getting bigger annd that means more water more frequently. What are your temps??? Heat might be an issue also. Do you have a fan in there??? If...
I have grown 5 different strains of autoflowers and not one was done before 10 weeks from seed. Not 10 week flowering... I use soil and have grown inside and out. If that method of LST is what you like...so be it, no harm in it. Good luck!
Maybe add a little nitrogen/veg nute. YourLST technique doesnt look very efficient. Next time try keeping it going in just one direction. And it definitely looks like it will take at least 10 weeks if it just started preflowers at week 4. Looking good tho good luck.