ARE THEY FINE?

Hey MrJoint Plants are looking good. No deficiencies or excess. Those burned tips you see is a consequence from week 4.. Its seems like you overwatered her just a bit. You can notice that from the leaves looking a little soggy but mainly from the curled tips, claw looking tips. When that happens some times the tips don't straighten back and end up burning. It's not nutrient burn. Just be ware not to over water, it's better to have to add water than to wait days for them to dry. Which leaves worse consequences behind like burned leaves, damaged roots from lack of oxygen, etc... Your doing fine, nothing to worry about. Just keep an eye on the watering. You want your leaves to look perky. Always. Hope this helped. Good luck and happy growing!