Light cycle for veg

In our area the longest day is 15hrs 20m in late June. We hit 15hrs at the end of May. I'd like to prevent early transplant flower / reveg by growing indoors under 15/9 until they're ready to go out, but I don't know if that's a long enough light cycle for them to stay in veg.
Any comments would be much appreciated.

I have run 18/6 for years without problems....best of luck

Where are you from? Are you also taking into account for the twilight hours?

Citylimits said:

Where are you from? Are you also taking into account for the twilight hours?

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Just actual daylight. There's roughly another 90 minutes of twilight (pre-dawn/post sunset). 42.66° N latitude

I start on 15/9 and sometimes they show sex but never bloom. I veg for 2 months then they go out late may/June 1st.

I’ve always done 18/6

Got 14 plants on 24-7 just trying to get them as big as I can to make a good seed cop of fem, beans and its my first indoor grow.

I've never done more than 18/6, but many growers do. The trick is to ease back gradually so you are matching the natural light cycle when it's time to go outside.

too larry said:

I've never done more than 18/6, but many growers do. The trick is to ease back gradually so you are matching the natural light cycle when it's time to go outside.

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Thanks. Nice to have confirmation