Is 10-30-20 Flower Booter ok?(Need answer within 15 min!!)

I need to know if this is cool for a flowering plant before light are out in 15 min. It needs to be watered before lights out, its pretty dry.

is 10-30-20 ok?

Thanks.

I Would Dilute It Some....it Looks Like A Booster..

Thanks, yeah I was gonna dilute, Just wanted some input thanks!