that will work, also bone meal will work and is available at Lowes
Organic miracle grow bone meal is 6-9-0. Peter's professional 20-20-20 works good for pot, and I have bought it before at Lowes. I like to only grow organic nowadays so i use stuff like biobizz, ageoldorganics, and bat quano, bone meal etc.
i've used shultz 10-60-10 for flowering before and had no problems. when you get fertilizers like this you just have to use less than the recomended dose.NO!!!!!!! that's a super phosphate. super p's are very bad for pot. you can use it one time, as a boost, but repetitive use causes a p tox, lowering ph, causing lockouts, then deficiencies.
don't use super phosphates on pot
hosphorousotassium) and a one two three for flower. 5-10-15 ie, would work very well for flower. if you can add potassium to the root stim, you might end up with some very pleasant results. 
i use 24-8-16 during veg. when it come to flower nuts you want no or very little nitrigone in your bloom nuts you want somthing with a NPK in this range.
