Humboldts Secret Base A & B Liquid Hydroponic Fertilizer | Complete Hydroponic Nutrients for Indoor and Outdoor Plants | Supports Healthy Vegetative Growth and Flowering Stage | 8 Ounce Set
Humboldts Secret Base A & B Liquid Hydroponic Fertilizer | Complete Hydroponic Nutrients for Indoor and Outdoor Plants | Supports Healthy Vegetative Growth and Flowering Stage | 8 Ounce Set
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Humboldts Secret Base A & B Liquid Hydroponic Fertilizer | Complete Hydroponic Nutrients for Indoor and Outdoor Plants | Supports Healthy Vegetative Growth and Flowering Stage | 8 Ounce Set

Key item features

  • Fuel Plants With Complete Nutrition: Humboldts Secret Base A and B delivers a full-spectrum formula with nitrogen, phosphorus, potassium, calcium, and magnesium. These premium plant nutrients support steady development, vibrant leaves, and bold blooms for vegetables, herbs, flowers, and indoor plants. Our formula is ideal for those who want lasting plant health and consistent feeding every single week.
  • Simplify Your Feeding Routine: Our easy two-part system requires no complex schedules or guesswork. Just mix equal parts of Base A and B with every watering. This consistent approach supports better absorption and stronger plants across hydroponic gardening, coco coir, or traditional soil setups. Measuring and mixing take just seconds each time.
  • Compatible With Any Grow Setup: Humboldts Secret nutrients are built for results in deep water culture, aquaponics, pots, raised beds, or coco. Our Base A and B are trusted as reliable hydroponic nutrients by both home growers and commercial cultivators. Works great with timers, tanks, or hand watering systems.
  • Professional Results Without the Hassle: Our pH-balanced, fully water-soluble formula mixes fast and clean. It won’t clog lines or leave residue, making it ideal for hand-watering or automated systems. Humboldts Secret delivers dependable liquid plant food for every stage of plant development. Start seeing results in just a week.
  • Support Every Plant With One Formula: From leafy greens and flowering plants to trees, herbs, and houseplants, our Base A and B system delivers the core nutrients all plants need. Use this proven fertilizer for indoor plants across your entire garden for consistent, visible results. Safe for hydroponics, soil, containers, or beds.
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4.8 out of 5 stars
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Showing 1-3 of 17 reviews

Mar 1, 2026
Len
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Size: 8 Ounce (Set of 2)
Sold and shipped byHS Supplies
5 out of 5 stars review

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Set It And Forget It - Best Way To Feed My Plants

I have a lot of indoor plants, bonsai trees, and a wide variety of planters in my apartment. Most everything I grow is under artificial light, usually LED. I have been considering getting some kind of hydroponic nutrients for some time, but when I saw Humboldts and read the reviews, I thought I'd give it a try. I'm glad I did. It's so much easier to measure out a specific amount of Humboldts and mix that with the water the plants are given on a regular and consistent basis. I thoroughly enjoy the "set it and forget it" principle of hydroponic watering. I can just add nutrients on a set schedule and the plants grow beautifully and healthily.

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Helpful?5DNOAT8A4BH118661854580
Apr 26, 2026
Frances
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Size: 8 Ounce (Set of 2)
Sold and shipped byHS Supplies
5 out of 5 stars review

Verified Purchase

Hydroponics fertilizer

First time growing with a hydroponic system. Told I needed fertilizer in it. So I got this one. I have lettuce in it now but plan to transfer them to hanging cloth bags and soil next 7-10 days. First I want to fertilize them. Only growing vegetables for now in the hydroponic system as I’m not a big fan of flowers due to allergies. This is a new experience for me and what I read on this fertilizer seems very easy to use. I’m comfortable with using it for my veggies

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Helpful?5DNOAT8A4BH118661854580
Apr 22, 2026
Denise
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Size: 8 Ounce (Set of 2)
Sold and shipped byHS Supplies
5 out of 5 stars review

Verified Purchase

Amazing for starter plants

I already have the system with all the different foods but I especially love the bases A %26 B. They really work for starter plants and sprouts. Really does the job so I had to purchase more for more plants and veggies I’m planting. I also used this on my lawn for bare spots. And I have been seeing grass starting to grow .

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Helpful?5DNOAT8A4BH118661854580