it looks steady but just a few questions for ureself to think about,these are the usual aspects alough if not right can make growth slow down and not produce propurly.
atmoshere,
temprature,
co2 levels,
ph levels,
these are the most important things i would think about if i was you, also pot size and soil mixture,but the leaves look quite healthy.also the lighting try experimenting moving the lighting up or down for a few days at a time and see what helps boost the plants growth. usaly this is done much earlyer but you should be able to make a few tweaks to get the grow ticking over, maybe your plants are in a climate to simialr to outdoors therefore your plants are takeing longer to produce.this is one of the main reasons we grow indoors so we can alter and change things so the plants can grow propurly and aceptible for the grower himself,hence why we have indoor strains which have been specifacly designed for best results.