Been about 15 years since I last grew outdoors, but if memory serves me right, yes it would affect growth. Altho the only light in the shade is reflected sunlight, which is not nearly strong enough for full photosynthesis, (but it isn't a dark period, either) it's likely pissing 'em off trying to figure-out what season it is.

Doubtful it would hurt moving them to get a couple of extra hours of full sun, as long as you keep any light to 12 hrs max. Including shade. How are you protecting her from light after 12 hours?

Do you always flower off-season, or is this a situational thing? I'm not saying it's wrong, as I am aware it is possible, but when I was grew outdoors I was more into making my job easier, not harder. (if you don't include the hike to the grow, with 60,000 pounds of water, nutes and supplies)

Also...just curious...if you did this before and it didn't work, what did you do differently this time?