Is this any good?

This is for grass not grass my friend. If you spend the $ on stuff designed for grass not grass.

It wouldn't be, as it's a slow releasing nutrient blend, I mean look at the size of those minerals!. Maybe In a super soil it might be worth adding a bit but I'd still prefer to add the usual (normal) things anyway that release slow but not so slow.

1-5-5 is probably not a great ratio by itself. want cheap fertilzier? buy 25lb bags of jacks 5-12-26 and combine with generic epson salt and calcium nitrate. can get a 50lb bag of cal nitrate for 30-40 usd (yara liva or whatever the brand is called.) There prices have gone up lately, but still less than 4 cents per gallon and it's something over 3500 gallons mixed, if i recall correctly... even if not exact, it's thousands of gallons. megacrop, cropsalt, masterblend, southern ag and others all have a similar setup -- some 'base' with cal-nitrate and epsom. Between these three you parts can adjust formula in a fairly resolved way to avoid all vast majority of potential symptoms wiht a rock solid formula. Jacks also has a 0-12-26 "Part A" option, which allows you to drop N while maintaining caclium levels in flower. i don't get any of these products for free. I am not a shill for hire. The particular brand in this case is irrelevant. If you see another brand with a similar setup and cheaper, go that way.