The fert i use (and i'm not saying that it's the best!), is something like 6-6-6, but it's diluted 10ml to 6 litres of water (10ml is 2 x about tablespoons, 6 litres is well over a UK gallon), so i would say cut back some.

Having said all that it all depends on what stage your plants are at. If they're well developed and show no signs of over-fertilizing, then you should be OK, but like I said I'd need more information.

Hope it all goes well for you nonetheless :thumbsup: