Well funny you should ask..because I just fed them today...and will feed one more time ...but in ten days I am going to have to lose this fish fert for some flowering food...might have to hit the hydro store for that :>{ ...unless lowes has something, because there is nothing I am interested in at walmart for flowering..have used their cactus liquid mg feed 2-7-7- ..but not going to go that cheap this year on these beauties...I have never grown anything with romulan in it and this hybrid from classic seeds is a hawaiian skunk x romulan and they are ridiculous ..I am actually kinda nervous...can be seen from the street and need another 8 weeks..been topped and tied and each plant is 5.5 feet tall by 6 feet wide..with 100's of tops....and I planted late so they would not get so massive and noticeable...will start sleeping out there nightly in september and october until they finish.