That really isn't a factor ...they can be aggressive at any age or any time of the year. Next spring will "tell the tale", for sure!
I have young birds, this year's hatch and some that are 7 years old that are aggressive. I tend to move all the aggressive birds into 1 or 2 enclosures and let...
A better ratio would be 1 pair for that size enclosure but since you already have 2 males and 3 females, you can try it....they may get along or they may not! Just be ready to separate them if aggression is appearant.