Your Plant looks good, I would personally leave them in Veg for another 2-4weeks possibly longer, If you have grow lights try setting them to 18/6 or 20/4 so the plant gets enough light for Photosynthesis. Try Using high levels of (N) Nitrogen for Vegetative stage, "Improves growth." Keep in mind not to over feed! it could easily lead to Nutrient Burns. Happy Growing