Its is normal for some leaves to die and drop off during flowering ... usualy starting at the bottom ... however the pics show that there is more than this ... I will let some one else reply about this ...

I have just bought a product from FoxFarms called Cha Ching ... its a high power essential oil producer ... its too early for me to see results ... so I cant recomend it just yet ... just letting you it exsists ... other companies sell an essential oils producers as well

essential oils = More crystals