Its no problem to do that, because days are getting longer every day. And 14 hours of light are great. And you can take them from your indoors 18 hour sdirectly to the 14 hours outdoors. They just get used to sunlight and wind, so start on a place with shadow, and alittle windprotected. To strengthen the plant you can shake the stm and branches dayly // softly. So microcracks apear and strenthen the branches. Feeding silica does the same to them.