Hi ✌️ I tried to put nutrients on the flower to faster change flowering.
Feeding (2l)
25.8.2k19
Fish Mix - 1ml/l
Bio Heaven - 1ml/l
Bio Bloom - 2ml/l
Top Max - 2ml/l
put a big cloth covering your complete tent after 11-12 hours of light, 10 hours is ok too.
it will encourage flowering faster as you wanted, costs a little time.
if you cannot do that, don't worry some pheno's dont start flowering at 14 hours, sometimes they need 11-12 hours of darkness