m0useanswered grow question 2y ago I'd let it fill the new container and get a solid root base going before switching it to flower, about 2 weeks is good IMO.,
You don't want it focusing on making roots and flowers at the same time as then its resources will be stretched thin.
Plus if you clones are smaller letting them veg a little longer will help the plants achieve/yield more.
I like to do min 6 week veg on all plants before flipping to flower.
Good Luck!