Humboldts Secret Set of A & B Liquid Hydroponics Fertilizer - World's Best Nutrient System – Hydroponic Nutrients for Outdoor, Indoor Plants – Supports Vegetative and Flowering Stages of Plants

Excellent product. Used now for a little over 3 weeks, Shipper made mistake that I did not catch, but spouse did. They sent 2 bottles of "A" instead of one each. Honestly was impressed with just the "A" part. Been using the mix of "AB" for about 2 weeks and "*%&<÷>=/&". Plants using about 1 gallons every other day. Mixed as recommended, will last a long time at the rate of use. 6 teaspoons per oz. 32 oz per bottle (192) feedings..... I recommend this product. HUMBOLTS! NICE. Thanks

I’ve been using these for my “tomato’s” and honestly works great makes your plant grow like crazy if it’s your first time maybe try there stater kit

Great for my hydroponic Lettuce

This stuff seems to work, but the wording on the back is hilariously ambiguous, and I'm sure I'm adding the wrong amounts. It says "5-9ml/GAL A + B". First up, mixing metric and imperial measurements like that is confusing - it's a bit like saying "5-9 inches per kilometer". Beyond that, this wording could mean: 1) "5-9ml of A + B combined per gallon of water you are adding" 2) "5-9ml of A and 5-9ml of B per gallon of water you are adding" 3) "5-9ml of A + B combined per gallon of water in your tank" 4) "5-9ml of A and 5-9ml of B per gallon of water in your tank" I think it's option 2, but as a hydroponics noob I could see it being 3 or 4 too (maybe the plants pull all the nutrients out of the tank water so you need to replenish - dunno). Here are a few formulations of what I think they mean, using a consistent measuring system: * mix 1-2ml of each of A and B per liter of water you add * mix 1-2 parts of each of A and B with 1000 parts water, then add to your tank * mix 0.2-0.3 fl oz of each of A and B per gallon of water you add You probably boost your chances by sticking to metric here as they're calling for a dilution of roughly a thousand to one, and that's hard to do with imperial. Also, invest in a pipette because eyeballing 9ml is a challenge for the best of us.

Exactly what I ordered! So glad for it.