Sure is.
Once your plant has small "tufts" or "budlets" of white pistils/hairs, you can gradually switch to bloom nutrients. At this stage your plant still needs slightly higher levels of nitrogen to help it through the "stretch" period.
From this stage that your plant is in, I like to continue with grow nutrients for another 2 weeks or so, before switching to half grow and half bloom nutrients for another 2 weeks, before then switching to pure bloom nutrients through to the end. This seems to produce the densest and hardest flowers, and of good size too. If you can get some fulvic acid or humic acid or amino acids, (or all 3 for best results), this will really help with plant health, flower quality and trichome production. These 3 acids are hugely beneficial and actually do a great deal of good, unlike the urban myth of giving your plant molasses, which basically does nothing.
Hope this helps,........
Organoman.