Help--fertilizer for tomatoes in an Earthbox
Hi, I just ordered and received my first Earthbox. I want to plant my tomatoes right up, but am not sure what sort of fertilizer to use. The instructions say granular with all 3 #'s between 5 & 15. But within this range I can't seem to find anything that is granular and not time released. I wanted to use Gardens Alive's tomato food but they don't list the percentages on the website. How much will it affect me if I order this and get it and the numbers are not within the stated range? I see big bags of granular lawn food, but the smaller multio-purpose bags I have seen do not fall within those numbers. I have some Gardens Alive for flowers which is a 3-3-1 would that work? Otherwise everything is time released that I saw at Lowes. (like osmocote) I have Orthos Rose Pride which is a 15-5-10. Any Earthbox users know anything about this? I really want to plant my tomatoes this weekend.
Here is a link that might be useful: Gardens Alive Tomato Fertilizer