Welcome to 420 Magazine my friend. From what I see they seem to be healthy.
If you could supply me with better pictures primarily of the "problematic" areas I can diagnose the problem better.
How to Ask for Grow Support
REQUIRED INFORMATION FOR GROW SUPPORT
What Strain is it?
Is it Indica, Sativa or Hybrid? What percentages?
How Many Plants?
Is it in Vegetative or Flowering Stage?
If in Vegetative Stage... How Long?
If in Flowering Stage... How Long?
Indoor or Outdoor?
Soil or Hydro?
If Hydro, Reservoir size?
If Hydro, Reservoir Temperature?
If Hydro, what type of Medium?
If Hydro, what type of Setup?
If Soil... What is in your Mix?
If Soil... What Size Pot?
Size (Wattage) of Light? How Many?
Is it Air Cooled?
Temperature of Room/Cabinet?
RH of Room/Cabinet?
PH of Medium or Reservoir?
How Often are you Watering?
Type and Strength of Fertilizers used?
Size or Square Footage of Room?
This information is necessary for accurate support to be given.