IMO blowing hot breathe into the jar for awhile while create a foggy moisture in your jar, do this until your buds feel a moist, then cap it back up. you can do this as desired without worries of mold.
Man that plant doesn't even look close to ready man. Where's the bud? Is their even much trichomes's on it, cuz that is a big plant and it should put out a lot more bud than that.(depending on your condotions. but a 100x scope will definately do the trick) Leaves dye throughout a plants life...
one nutrient i really recommend is overdrive for the ;ast few weeks of flowering. definately will show some improvement in the triche's and bud growth. also i would flush my plant with a final finish both of which are advanced nutrient products.