When a swarm is little, it is usual that it is "late" swarm and it has virgin queen. That kind of queen starts to lay eggs after 7-10 days.
If you do not have one box full of bees, give from tour big hive hactshing brood enough that a little one gets good start. After 2 month that is ready to collect honey.
But it is not useful to keep swarming queen. It inherits and you will loose some swarms next summer! Change the queen at autumn.