After rain I would usually give them a heap of greens for the following week. And by heap I mean more than normal. I would also change the branches in the aviary to fresh green ones.
This used to send all 30 of my budgies into a breeding frenzy almost instantly regardless of the time of year. I usually only did this in spring or summer though (and possibly autumn) as I found some of the weaker hens would struggle.
Breeding Project 2020-2025.
agate mosaic canaries, agate yellow mosaic canaries, red zebs, self bengos and goldfinch mules.