Just got my Peters order in - Blossom Booster and Citrus FeED. FWIW, I think I found the Holy Grail for a complete, start to finish fertilizer. It's Jack's Classic Peters Citrus FeeD, a new 20-10-20 product. Compared to their popular Blossom Booster it has more Mg, 1% versus .50%; more Fe which is tripled chelated (EDTA, EDDHA, DTPA) to take into account any kind of soil chemistry, .15% versus .10%; 4.9% sulfur where the Blossom Booster has none, and more of an acidifying affect. 11 elements in all which I could recommend for coco and perhaps soil-less too. Caveat - more does not necessarily mean better. It's all about the balance. For example, this 20-10-20 will produce more yield versus someone hitting their plants with a low N, high K or P food.
Soil growers should check it out. What that formula suggests (based on my knowledge of cannabis nutrition and soil chemistry) is a greener plant (think Fe, S, Mg) with less stretch (low P) and an excellent NPK balance to support foliage, roots, and flowers.....a perfect one shot nutrition solution. No Weight Watchers program for this bendejo!
The N profile is 2% ammoniacal N, 3% nitrate N, 15% urea, which adds up to an acidifying affect.
Uncle Ben
