After a little google, I have to say no. That soil is for vegetative growth, not flowering. Houseplants, and such. The description says you don't need to add anything for up to six months. Depending on your seed being auto, fem, or photo you will be drawing in great amounts of veg nutrients well into flowering where you can look forward to nutrient issues. When you get to flowering, you will need to add flowering nutes.
Plus, it looks damned expensive.
I'm going to throw this out without being a dick. I can be a dick, but not this time. Stop looking for cheap and/or lazy man's solutions for your first grow. Go to the main GWE website and take a look at options. I don't mean the most expensive. I mean options that show you what is happening with water, pH, nutrients, light, and the ilk so you get a feel for what is going on in your first grow. There are example setups for budgeters and ballers. It's taken me five years to put together my cheap-to-high-end setup. If you have the cash, there are kits that have more than you need. If you are as broke as me, one good piece now is worth ten okay pieces later.