In 2017 I tried starting about 4 seedlings outdoors in April May. Different varieties. I like Indica-Sativa mixes.
They all went into flowering & would not revert to veg. Or rather, I gave up on all but one of them, after about a month.
Kept one which gave up the seed which was last year's male, a super hardy survivor type plant. She took about 3 months to get back to veg, and then to join the other plants in a normal flowering cycle in August-September-October.
That's at 42 North with a hill reducing sunlight hours to about 6 hours a day, during the spring.
If you can, I would keep a light on them until about June 21, enough to establish the photo-period you want them to have.
The Nice Part about Running a Temperature ~
A 30 Degree day feels like a 40 Degree Day