PH Up

Restore balance — fix low pH fast.
Use this formula to activate your plants’ nutrient potential for stronger, more productive growth.

Adjusts pH fast for better nutrient uptake
Works in soil, coco, hydroponic systems, DWC, aquaponics, and more
Highly-concentrated formula
Clean, dye-free, and safe for all plant types
Trusted by gardeners using distilled, rain, or soft water

“If you grow hydro, you should always have a jug of this on hand.”

$11.97

Packaging Update: You may receive previous or updated packaging during our transition. Same formula, same performance.

Interested in bulk buying or wholesale pricing? Contact us here.

Bigger gains start with the right balance.

Better pH = better growth. Every drop counts. When your pH drops too low, your plants stop absorbing nutrients — no matter how perfect your feeding mix is.

Humboldts Secret pH Up is your fast, clean fix for low pH. Crafted by gardeners, for gardeners — it gives you precise pH control using just a few powerful drops. Without additives that clog, stain, or disrupt nutrient uptake

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What makes pH Up better than the rest?

“Cleaner and more consistent than baking soda. My pH stayed stable.”

No sodium, no residue: Made with clean potassium hydroxide. No baking soda, no salt buildup, no clogging.

Works in any system: Works in soil, coco coir, hydroponics (including DWC), aquaponics, and more.

Made in the USA by gardeners: Formulated and packed in California, by people who grow.

Concentrated, cost-effective: A little goes a long way. One bottle lasts for months, even in daily hydro use.

Safe for all plants: Dye-free, fragrance-free, and safe for all edibles, ornamentals, and flowers.

Precise pH control: Skip the trial-and-error. A few drops raise pH fast, without guessing or overshooting.

No sodium, no residue: Made with clean potassium hydroxide. No baking soda, no salt buildup, no clogging.

Works in any system: Works in soil, coco coir, hydroponics (including DWC), aquaponics, and more.

Made in the USA by gardeners: Formulated and packed in California, by people who grow.

Concentrated, cost-effective: A little goes a long way. One bottle lasts for months, even in daily hydro use.

Safe for all plants: Dye-free, fragrance-free, and safe for all edibles, ornamentals, and flowers.

Precise pH control: Skip the trial-and-error. A few drops raise pH fast, without guessing or overshooting.

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What’s inside?

Command the chemistry with one purpose-built ingredient: commercial-grade potassium hydroxide (KOH)

Fully water-soluble
100% free from additives, colorants, or synthetic fillers
Concentrated to work with just 1–2 ml per gallon

Perfect for correcting pH in any system — whether you’re growing tomatoes in coco or orchids in hydro.

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How to use pH Up.(In just 4 easy steps).

1

Measure your mix: Use a pH meter (avoid paper strips for accuracy)

2

If too acidic(below 5.5–5.8): Add 1–2 ml of pH Up per gallon

3

Stir and recheck: Repeat in small increments until target pH is reached (usually 5.8–6.5)

4

Feed as normal once balanced

Gardener’s Tip: Potent formulas demand precision. Go slow, and use a dropper or syringe to unlock best results.

Don’t let low pH stall your grow.

Low pH locks out nutrients. Stop the slowdown before it starts. If left unchecked, acidic water leads to nutrient lockout, yellow leaves, and slowed development. That’s wasted product and time.

Fix it fast with a clean, reliable pH increaser made for all gardeners. No mystery dosing. No advanced alchemy. No stress.

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Visible victories from gardeners like you.

pH Up FAQ

Yes. pH Up is fully water-soluble and designed for hydroponic setups, including deep water culture (DWC), ebb and flow, and drip irrigation systems. It won’t clog your lines, and it dissolves completely for clean, reliable performance.

Absolutely. Our formula is made with commercial-grade potassium hydroxide and contains zero dyes, fragrances, or synthetic preservatives. It’s completely plant-safe — ideal for leafy greens, tomatoes, citrus, and even sensitive ornamentals.

That depends on your grow setup and water source. For hydroponics or distilled water, pH may drift more quickly, so check before each feeding. In soil or coco, testing once a week or when mixing new nutrient batches is usually enough.

Baking soda is not made for plant systems. It introduces excess sodium that causes salt buildup and nutrient lockout over time. Humboldts Secret pH Up uses potassium hydroxide for clean, targeted pH control. So there’s no fillers, and no damage to your roots.

Each 32oz bottle contains hundreds of applications. You’ll use just 1–2ml per gallon to correct pH. Most gardeners — even hydro users — find it lasts for months, making it one of the most cost-effective tools in your nutrient kit.

If your pH goes too high, no problem. Recheck with your pH meter and carefully adjust using Humboldts Secret pH Down. Start with small amounts, mix thoroughly, and never eyeball it. Precision is key to optimal plant health.

Yes. It’s made for everyday gardeners and home gardeners who want fast, stress-free results. With simple directions and fast feedback, you’ll get the hang of pH adjustments in no time.

Your shortcut to a healthier, more productive grow.

Humboldts Secret pH Up gives you total control over one of the most overlooked parts of growing: pH balance. When your pH levels are right, your nutrients work better — and your plants reach their full potential.

Over one hundred thousand gardeners trust Humboldts Secret for a reason. Join them, and watch your plants thrive.

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