Stretch der White Widows

Servus Collie, always depending on how tall you want to have your plants. Normally you can calculate a stretch of 25-75%. But I highly doubt that the White widow will perform a big stretch. So I would say, If you change to 12/12 now, you´ll end up with a plant around 50-60cm tall. Of course there are strains which can perform way more stretch. Good luck for the rest of the way! Servus👍