12/12 is a purely indoor technique and doesn't have fuck-all to do with outdoor growing.

They will start to flower in about a months time.

They are pre-flowering because they have reached sexual maturity, not because it is raining.

Obviously the best thing you can do is get them in the ground or in 10gal+ pots. Otherwise, I'd be concerned that they will continue to grow fine, but the flowers won't be as big as they could be because of the plant being rootbound, like you said, and not being able to take in enough nutrients.

Basically, get them in the ground dude!

Good job so far and good luck for the rest of the season.

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