Ph of Pro mix before planting newly germinated seeds

[kabongster]

Increasing dark time will push preflowering?

A question from a fellow grower: Now I have a question… If I keep my plants on a longer dark cycle will pre-flowers be more likely to occur for determining gender? Ive got them on a 17/7 light schedule just for accuracy of summer lighting assuming it gets dark around 9 light around 4. Wondering if increasing dark time will help to push plants into pre-flowering.