The older leaves on the plants are now turning a more yellowish shade of green, and the new leaves are a deep healthy green but could be described as being "bubbly", so I assume some new feltilizer won't harm. As I've just watered them (too?) well, I might opt for a foliar fertilizer like Nitrozyme which is supposedly made out of seaweed. Would that be a good start?
Also, I'll upload some pictures in daylight tomorrow
