1st Grow

Flipped to Flowering Schedule on July 20th. Checked every Day for white Pistils but there arent any. Also I'm Not Happy with the development of Pineapple Chunk #2 she sprouted the eariest, i topped her on week 2 i think but barely gained any height. Internodal distance is almost non existant, it looks like the young leaves stack so hard on each other they opress and "suffocate" each other in growth... Pineapple Chunk #1 and Lemon Drizzle are doing well despite the lack of height... Lemon Orange #1 and Lemon Orange #3 were added one week after seeding the main 3 They overtook all 3 in height... Lemon Oranges are almost 30cm but are the only Plant that were not topped. Switched my watering to "Dunking" Method to ensure proper watering. Why are my plants so small compared to their stem size... Why are they not gaining any height.... Horizontal space gets limited but i can raise my lights at least 60cm PPFD is around 550 Right now I'm very frustrated how things are running Also when is Flowering starting? When Pistils show up or when the light cycle is being switched? Edit: Yesterday first Pistil appeared. Today some more, at last! Took exactly 7 Days to transition