What's Next After Flowering?

A customer has a question and I hope we can get some opinions on it, thanks.

“I put my seedlings out after 3 weeks of 24 hr light on
At about the beginning of April
They have stopped growing and are flowering
What do I do ?”

I am assuming they are an autoflower strain.
If so just keep an eye on them to be sure they remain healthy and give them some nutrients that are for the bloom stage. Monitor the white hairs and when they start turning brown you will want to get a jewlers loop or magnifying glass and check the trichomes to see when it is time to harvest.