Thank you @sebako :) Hanging how? With berries hanging outside pots?
They'll also get more blossoms if there's less nitrogen, and more phosphorus & potassium. With too high nitrogen levels they'll create loads of foliage, and runners... Giving them fertilizers in autumn helps, as the nitrogen vaporizes before spring ;)
I purposely gave them too much nitrogen this year, to get as many plants as possible... Two plants turned to 28 ;)