Fastbuds first ever grow

Hey So here are my girls at day 19, they seem to be doing good, no major problems apart from what I think could be minor nute burn on the Pineapple Express?? There is new growth going on underneath the leaves, I’m thinking that they’re still quite small and not a lot of growth height wise?? Feeding half strength nutes 2x weekly with plain PH water in between feeds. I’m thinking that from now on I should be watering them until I get run off, I have still been watering around them for fear of over watering again and the fact they’re still quite small. Any advice would be greatly appreciated. How long do these girls veg for until they start flowering? And what signs should I look out for? Thanks guys and gals 😊