Pre flower?
Die eine Pflanze bildet einzelne Haare am Stamm ( nicht an den Enden der Triebe )
Ist dies ein Zeichen von Anfang der Blüte ?
Wie lange bleiben die von nun an noch ca in der Vegetation?
Yup. She's a starting.
She'll do her pre stretch before you see pistils (stigmata) coming from the tops of your shoots. That's just telling you it's getting ready for her push into it. Like a woman getting a big belly. Your plant will grow to accommodate its needs (buds)