Have you considered more brood space?Debating whether to add a second super already! There's a little more room in the first super, but I want to keep ahead of them to try and delay swarming.
In terms of filling the super, the central 4 frames were perhaps 50% full of nectar so they're definitely bringing something in now. The other 2 colonies in the same apiary are much further behind.
View attachment 35670