Since NL is a indica the synergy with a majority of ambar trichomes would be recomended and most enjoyable, so taking that into account probably 2 to 3 weeks to harvest and if you don't flush you can expect some bigger buds as on this time they will fatten up the most specially if you got something that is like 0%-60%-40% NPK or similat to apply, instead of flushing you can just wash the soil of the roots with water at the end and place her in a high cup filled with RO water for a couple days to starve her faster without hurting the yields.
Good luck growmie, hope its helpfull, and stay lit.