Heavy 16 is my nutrient of choice. It was developed for herb, not "flowering plants".
"Our flagship hydroponic nutrient proudly made available to the small farmer and gardener. Before releasing Heavy 16 to the public we took a discerning look at what the professional hydroponic grower was demanding and what was currently available in the marketplace. This no nonsense approach has allowed us to take the most relevant, non-biased attributes and harmonize them with Field 16’s proven plant nutrition program and production principals. Heavy 16 is for every grower that wants the best results without the hassle of buying and using multiple additives, trying to keep dilution rates straight, or not getting the power and versatility of a commercial strength nutrient. We’re confident that Heavy 16’s unique quality, packaging, and versatility will give you the results and convenience that you have always wanted from your nutrient program, no matter what size operation you run or experience level you are currently at."
http://field16.com/products.html