need a little help

Hi All,

I picked up three clones a month ago and they are growing well and are now about 2' tall. They are now staring to flower. I live in S. Cali and frost isn't an issue until Jan. And right now we have close to 14 hours of light. I would like to see the girls grow a bit more say a month. If I were to place a light in the greenhouse where I am growing so that they get 18 hours of light will that make them to go back to veg growth? Would it stress them to the point of risking them becoming a hermie?

14 hours of light shouldn't see them flowering yet anyway. No problem extending the photoperiod to 18 in that case.