Funny, I would say the exact opposite about this:

• start indoors under 24 hour light, using passive hydropics for ultra-fast germination in rockwool.
• transplant to larger RW cubes, avoiding any transplant shock in the process.
• once 24" high, just take them outside to the greenhouse. Free sunshine does the rest, still protected from bugs. Any plastic covered tool shed, pump house, or other innocuous fixture in your garden does the trick, just needs full sun all day if possible.
• I can get full clone (no germination) to mature buds, in 3.5 months this way; 6 weeks indoors, 8 weeks outdoors.