Red mandarin f1 fast

Still vegging under 18 hours of light trying to get them big enough to put outside my micro climate is only a few miles from the coast so I kind of be cool outside and overcast a lot so I vegged indoors get them as big as they have room for before I put them outside In the past my plants start blooming no matter what time of year I put them out because of the overcast nature of the area that’s why I picking red Mandarin because it’s fast And I want to beat the mold this year