@Xpie77, Hi Xpie77! - sorry for getting back so late!
Halfway through the flowering phase I bought "Shogun - Sumo Active Boost" which apparently contains an alfalfa sprout extract called "triacontanol".
I originally wanted "CANNA - Cannaboost" which afaik also uses alfalfa and seaweed extracts but the price per watering was higher than the shogun stuff.
The full additives the plants got were:
Compo Hakaphos Soft Ultra ( 18-12-18 ) NPK Fertilizer
Phosphorus based PH-
Epsom Salt
Algae Chalk
BioBizz Alg-A-Mic
Shogun Sumo Active Boost (late)
Hope that helps :)