Skip to main content
HalloweenPetLawn & GardenTruck & AutomotiveSporting GoodsHorseFarm & RanchClothingLivestockPet & Animal PharmacyToolsPoultryFencing & GatesHome ImprovementOutdoor LivingHeating & CoolingHome Decor & FurnitureOutdoor Power EquipmentTrailers & TowingBoots & ShoesWild Birds & WildlifeToysGift CardsServices Propane RefillTrailer RentalGarden CenterFeed CenterSame Day DeliveryPetVet ClinicPet WashGrooming at PetsenseDog Training at PetsenseTractor Supply RxPet InsuranceWag!

"Savings and Offers"

Weekly AdSaleClearance

"More Options"

Weekly AdWhat's NewTractor Supply AppEarn Rewards with Neighbor's ClubHometown HeroesLife Out Here BlogTSC Exclusive BrandsTop BrandsClearance ItemsBattery FinderOutdoor Power Equipment Parts FinderHitch Finder

Spend $49.99 to unlock Free Delivery on most orders

|
Learn More
Order statusTSC Credit CardsWhat’s newPetsenseWeekly Ad
​

Sign In / Enroll

Get rewarded!

​
Menu

Search

Home

Sign In

Cart
0.0
(0)
0.0 out of 5 stars.
A woman outside with a dog
A woman outside with a dog
  1. Home
  2. /
  3. Lawn & Garden
  4. /
  5. Plant Care & Fertilizer
  6. /
  7. Plant Food
  8. /

  9. Drip Hydro 1 gal. (3.79L) pH Down 55% pH Buffer Hydroponic Nutrient Solution, 1 pk.

  1. Home
  2. /
  4. /
  5. Plant Food

Drip Hydro 1 gal. (3.79L) pH Down 55% pH Buffer Hydroponic Nutrient Solution, 1 pk.

Shop all Drip Hydro
Drip Hydro 1 gal. (3.79L) pH Down 55% pH Buffer Hydroponic Nutrient Solution, 1 pk.

Item # 606786799

Drip Hydro Drip Hydro 1 gal. (3.79L) pH Down 55% pH Buffer Hydroponic Nutrient Solution, 1 pk.
Drip Hydro Drip Hydro 1 gal. (3.79L) pH Down 55% pH Buffer Hydroponic Nutrient Solution, 1 pk.
$68.99

Add this item to unlock free delivery!

Neighbor's Club logo
Neighbor’s Club Members earn points with purchases.

Sign in or Join Now

Shop all Drip Hydro
Drip Hydro 1 gal. (3.79L) pH Down 55% pH Buffer Hydroponic Nutrient Solution, 1 pk.

Item # 606786799

Drip Hydro Drip Hydro 1 gal. (3.79L) pH Down 55% pH Buffer Hydroponic Nutrient Solution, 1 pk.
Drip Hydro Drip Hydro 1 gal. (3.79L) pH Down 55% pH Buffer Hydroponic Nutrient Solution, 1 pk.

$68.99
financeCard Logo
New Cardmembers earn a $20 Reward‡ with qualifying purchase of $20 or more plus earn 5% in Rewards+ on this purchase. Valid through 8/9/26.

Add this item to unlock free delivery!

This item is available online only

Delivery to

Free standard delivery on online footwear & Clothing purchases of $49 and over.

​
Neighbor's Club logo
Neighbor’s Club Members earn points with purchases.

Sign in or Join Now

Drip Hydro pH Down (1 Gallon) is a highly concentrated 55% phosphoric acid solution designed to lower the pH of your irrigation water or nutrient mix with precision and ease. Proper pH is critical for nutrient uptake and healthy plant growth, especially in hydroponic, soil, and coco-based systems. Just 0.25-1 mL per adjustment is all you need to bring your solution into the ideal pH range. Trusted by commercial growers and home cultivators alike, this powerful pH adjuster keeps your plants thriving from seed to harvest. The phosphoric acid-based formula provides an NPK analysis of 0-55-0, supplying phosphorus without adding nitrogen or potassium.

Looking for more information on fertilizer? Check out our guide on how to read fertilizer numbers in the product documents section.

  • Lowers pH Quickly & Effectively Improves nutrient availability for stronger plant growth.
  • 55% Phosphoric Acid Formula High-strength solution for reliable pH control.
  • Low Dose, High Impact Use only 0.251 mL per adjustment for accurate results.
  • Safe for All Grow Methods Compatible with hydroponic, coco, soil, and fertigation systems.
  • Economical 1 Gallon Size Ideal for high-frequency use or larger grow setups.
BrandDrip Hydro
Country of OriginMade in USA
Application MethodN/A
Compatible SeasonsAll-season
Concentrated or Ready to UseConcentrated
Contact Or SystemicN/A
Coverage Area2,000 gal
EmergenceN/A
FeaturesLowers pH of nutrient solutions, Highly concentrated formula, 55% phosphoric acid based, Compatible with hydroponic and soil systems, Precise pH control
FormLiquid
Longevity0 days
NPK Ratio0-55-0
OrganicNo
Package Quantity1-pack
Package Size1 gal or 3.79 L
Product Height10.65 in.
Product Length5.2 in.
Product Weight11.52 lb.
Product Width6.45 in.
WarningsNo
Manufacturer Part Number30924
No questions have been asked about this product.

No questions have been asked about this product.

Q&As

No questions have been asked about this product.

No questions have been asked about this product.

Similar Items

  1. Drip Hydro 1 qt. (0.95L) pH Down 55% pH Buffer Hydroponic Nutrient Solution, 1 pk.
    0.0 out of 5 stars with 0 reviews
    0.0 (0)

    Drip Hydro 1 qt. (0.95L) pH Down 55% pH Buffer Hydroponic Nutrient Solution, 1 pk.

    $24.99
  2. Drip Hydro 5 gal. (18.93L) pH Down 55% pH Buffer Hydroponic Nutrient Solution, 1 pk.
    0.0 out of 5 stars with 0 reviews
    0.0 (0)

    Drip Hydro 5 gal. (18.93L) pH Down 55% pH Buffer Hydroponic Nutrient Solution, 1 pk.

    $349.99
  3. Drip Hydro 1 gal. (128 oz.) pH Up pH Buffer Hydroponic Nutrient Solution, 1 pk.
    0.0 out of 5 stars with 0 reviews
    0.0 (0)

    Drip Hydro 1 gal. (128 oz.) pH Up pH Buffer Hydroponic Nutrient Solution, 1 pk.

    $69.99
  4. Drip Hydro 5 gal. (18.93L) pH Up pH Buffer Hydroponic Nutrient Solution, 1 pk.
    0.0 out of 5 stars with 0 reviews
    0.0 (0)

    Drip Hydro 5 gal. (18.93L) pH Up pH Buffer Hydroponic Nutrient Solution, 1 pk.

    $349.99
  5. Drip Hydro 1 qt. (32 oz.) pH Up pH Buffer Hydroponic Nutrient Solution, 1 pk.
    0.0 out of 5 stars with 0 reviews
    0.0 (0)

    Drip Hydro 1 qt. (32 oz.) pH Up pH Buffer Hydroponic Nutrient Solution, 1 pk.

    $24.99
  6. Drip Hydro 1 gal. (3.79L) Base B Two-Part Nutrient Solution Liquid Plant Fertilizer Fruiting & Flowering Plants 0-4-4, 1 pk.
    0.0 out of 5 stars with 0 reviews
    0.0 (0)

    Drip Hydro 1 gal. (3.79L) Base B Two-Part Nutrient Solution Liquid Plant Fertilizer Fruiting & Flowering Plants 0-4-4, 1 pk.

    $41.99
  7. Drip Hydro 1 gal. (3.79L) Base A Two-Part Nutrient Solution Liquid Plant Fertilizer Fruiting & Flowering Plants 4-0-2, 1 pk.
    4.0 out of 5 stars with 2 reviews
    4.0 (2)

    Drip Hydro 1 gal. (3.79L) Base A Two-Part Nutrient Solution Liquid Plant Fertilizer Fruiting & Flowering Plants 4-0-2, 1 pk.

    $41.99
  8. Drip Hydro 1 qt. (0.95L) Base B Two-Part Nutrient Solution Liquid Plant Fertilizer Fruiting & Flowering Plants 0-4-4, 1 pk.
    0.0 out of 5 stars with 0 reviews
    0.0 (0)

    Drip Hydro 1 qt. (0.95L) Base B Two-Part Nutrient Solution Liquid Plant Fertilizer Fruiting & Flowering Plants 0-4-4, 1 pk.

    $15.99
  9. Drip Hydro 5-Part Hydroponic Nutrient System for Plant Growth and Flowering, Includes Base A, B, CaMg, Flex & Flow, 1 pk.
    0.0 out of 5 stars with 0 reviews
    0.0 (0)

    Drip Hydro 5-Part Hydroponic Nutrient System for Plant Growth and Flowering, Includes Base A, B, CaMg, Flex & Flow, 1 pk.

    $59.99
  10. Drip Hydro 5 gal. (18.93L) Base A Two-Part Nutrient Solution Liquid Plant Fertilizer Fruiting & Flowering Plants 4-0-2, 1 pk.
    0.0 out of 5 stars with 0 reviews
    0.0 (0)

    Drip Hydro 5 gal. (18.93L) Base A Two-Part Nutrient Solution Liquid Plant Fertilizer Fruiting & Flowering Plants 4-0-2, 1 pk.

    $188.99
  11. Drip Hydro 5 gal. (18.93L) Base B Two-Part Nutrient Solution Liquid Plant Fertilizer Fruiting & Flowering Plants 0-4-4, 1 pk.
    0.0 out of 5 stars with 0 reviews
    0.0 (0)

    Drip Hydro 5 gal. (18.93L) Base B Two-Part Nutrient Solution Liquid Plant Fertilizer Fruiting & Flowering Plants 0-4-4, 1 pk.

    $188.99
  12. Drip Hydro 55 gal. (208.20L) Base A Two-Part Nutrient Solution Liquid Plant Fertilizer Fruiting & Flowering Plants 4-0-2, 1 pk.
    0.0 out of 5 stars with 0 reviews
    0.0 (0)

    Drip Hydro 55 gal. (208.20L) Base A Two-Part Nutrient Solution Liquid Plant Fertilizer Fruiting & Flowering Plants 4-0-2, 1 pk.

    $1,399.99

Items You May Like

  1. Top Rated
    Drip Hydro 1 Gallon (3.79L) CaMg Calcium & Magnesium Supplement Liquid Plant Fertilizer Fruiting & Flowering Plants 2-0-0 1-Pack
    5.0 out of 5 stars with 1 reviews
    5.0 (1)

    Drip Hydro 1 Gallon (3.79L) CaMg Calcium & Magnesium Supplement Liquid Plant Fertilizer Fruiting & Flowering Plants 2-0-0 1-Pack

    $39.99
  2. Alaska 1 qt. Morbloom 0-10-10
    3.7 out of 5 stars with 15 reviews
    3.7 (15)

    Alaska 1 qt. Morbloom 0-10-10

    $9.99
    Was $12.99Save $3.00
  3. GroundWork 40 lb. 4,000 sq. ft. 12-12-12 All-Purpose Fertilizer
    4.2 out of 5 stars with 175 reviews
    4.2 (175)

    GroundWork 40 lb. 4,000 sq. ft. 12-12-12 All-Purpose Fertilizer

    $24.99
  4. Top Rated
    GreenView Garden Food 5-10-5
    5.0 out of 5 stars with 2 reviews
    5.0 (2)

    GreenView Garden Food 5-10-5

    $31.99
  5. Roots Plant Saver 4-7-7 10 lb.
    0.0 out of 5 stars with 0 reviews
    0.0 (0)

    Roots Plant Saver 4-7-7 10 lb.

    $69.99
  6. GroundWork 8 lb. 200 sq. ft. Natural All-Purpose Plant Food, 4-4-4
    0.0 out of 5 stars with 0 reviews
    0.0 (0)

    GroundWork 8 lb. 200 sq. ft. Natural All-Purpose Plant Food, 4-4-4

    $19.99
  7. GroundWork 50 lb. 5,000 sq. ft. 16-16-16 Fertilizer
    4.6 out of 5 stars with 59 reviews
    4.6 (59)

    GroundWork 50 lb. 5,000 sq. ft. 16-16-16 Fertilizer

    $44.99
  8. GroundWork 10 lb. All-Purpose Fertilizer, 10-10-10
    4.5 out of 5 stars with 55 reviews
    4.5 (55)

    GroundWork 10 lb. All-Purpose Fertilizer, 10-10-10

    $9.99
  9. Top Rated
    Espoma 18 lb. 180-360 sq. ft. Garden-Tone Organic Plant Food
    4.9 out of 5 stars with 15 reviews
    4.9 (15)

    Espoma 18 lb. 180-360 sq. ft. Garden-Tone Organic Plant Food

    $24.99
  10. Miracle-Gro 8 oz. Christmas Tree Fertilizer
    4.4 out of 5 stars with 92 reviews
    4.4 (92)

    Miracle-Gro 8 oz. Christmas Tree Fertilizer

    $6.99
  11. Schultz 4 oz. All-Purpose Liquid Plant Food
    0.0 out of 5 stars with 0 reviews
    0.0 (0)

    Schultz 4 oz. All-Purpose Liquid Plant Food

    $5.99
  12. Top Rated
    GreenView Multi-Purpose 14-14-14
    5.0 out of 5 stars with 2 reviews
    5.0 (2)

    GreenView Multi-Purpose 14-14-14

    $41.99

Customers Also Bought

  1. Espoma Garden-Tone Organic Plant Food, 27 lb., GT27
    0.0 out of 5 stars with 0 reviews
    0.0 (0)

    Espoma Garden-Tone Organic Plant Food, 27 lb., GT27

    $27.99
  2. Top Rated
    GroundWork 8 lb. 200 sq. ft. Natural Tomato and Vegetable Plant Food, 3-5-6
    5.0 out of 5 stars with 2 reviews
    5.0 (2)

    GroundWork 8 lb. 200 sq. ft. Natural Tomato and Vegetable Plant Food, 3-5-6

    $19.99
  3. Scotts 15.15 lb. 5,000 sq. ft. Green Max Lawn Food
    4.4 out of 5 stars with 66 reviews
    4.4 (66)

    Scotts 15.15 lb. 5,000 sq. ft. Green Max Lawn Food

    $51.99
  4. Shultz 1,000 sq. ft. 20-20-20 Water Soluble All Purpose Plant Food, 1.5 lb.
    0.0 out of 5 stars with 0 reviews
    0.0 (0)

    Shultz 1,000 sq. ft. 20-20-20 Water Soluble All Purpose Plant Food, 1.5 lb.

    $5.99
  5. GreenView 33 lb. 10-10-10 NPK Multi-Purpose Fertilizer
    4.1 out of 5 stars with 9 reviews
    4.1 (9)

    GreenView 33 lb. 10-10-10 NPK Multi-Purpose Fertilizer

    $34.99
  6. Alaska All Purpose Fish Fertilizer, 4-6-4, 4 lb.
    4.7 out of 5 stars with 167 reviews
    4.7 (167)

    Alaska All Purpose Fish Fertilizer, 4-6-4, 4 lb.

    $9.99
    Was $12.99Save $3.00
  7. Scotts 30.30 lb. 10,000 sq. ft. Green Max Lawn Food
    4.4 out of 5 stars with 66 reviews
    4.4 (66)

    Scotts 30.30 lb. 10,000 sq. ft. Green Max Lawn Food

    $99.99
  8. Miracle-Gro 8 oz. Water Soluble Orchid Food
    4.3 out of 5 stars with 44 reviews
    4.3 (44)

    Miracle-Gro 8 oz. Water Soluble Orchid Food

    $5.99
  9. Top Rated
    GreenView 8 lb. 2,500 sq. ft. Starter Fertilizer
    4.8 out of 5 stars with 36 reviews
    4.8 (36)

    GreenView 8 lb. 2,500 sq. ft. Starter Fertilizer
  10. Miracle-Gro 2.2 oz. Indoor Plant Food Spikes
    4.7 out of 5 stars with 87 reviews
    4.7 (87)

    Miracle-Gro 2.2 oz. Indoor Plant Food Spikes

    $3.99
  11. Top Rated
    Stens Battery Hold-Down Kit for Mowers
    5.0 out of 5 stars with 1 reviews
    5.0 (1)

    Stens Battery Hold-Down Kit for Mowers

    $29.99
  12. Top Rated
    Espoma 18 lb. 180-360 sq. ft. Plant-Tone Organic Plant Food
    5.0 out of 5 stars with 24 reviews
    5.0 (24)

    Espoma 18 lb. 180-360 sq. ft. Plant-Tone Organic Plant Food

    $24.99

Reviews

Review this Product

Select to rate the item with 1 star. This action will open submission form.
Select to rate the item with 2 stars. This action will open submission form.
Select to rate the item with 3 stars. This action will open submission form.
Select to rate the item with 4 stars. This action will open submission form.
Select to rate the item with 5 stars. This action will open submission form.
Be the first to review this product
Get the top deals, latest trends and more
Sign up for emails from Tractor Supply today.
First Name*
Last Name*
Email*

Customer Support

  • Order Status

  • Return Policy

  • Delivery Options

  • Tax Exemptions

  • Frequently Asked Questions

  • Contact Us

  • Recall Notices

  • Call:  

    (877) 718-6750

  • Mon - Sat: 7am - 9pm CT

  • Sun: 8am - 7pm CT

  • Closed Christmas Day

About Us

  • Who We Are

  • Investor Relations

  • Stewardship

  • Community

  • Military Support

  • Product Catalog

  • Tractor Supply Stores

  • .Pharmacy Verified Website

Work With Us

  • Careers

  • Sponsorship

  • Affiliate Program

  • Potential Vendor Partners

  • Vendor Information

  • Tractor Supply Media Network

Neighbor's Club

  • About

  • Rewards

  • Hometown Heroes

  • Frequently Asked Questions

  • Terms & Conditions

Credit Center

  • TSC Credit Card

  • Klarna

Stay Connected

Connect & Share with the Tractor Supply Community.

Tractor Supply App

Shop on the go with the Tractor Supply App

Learn More

Stay Connected

Connect & Share with the Tractor Supply Community.

Tractor Supply App

Shop on the go with the Tractor Supply App

Learn More
  • Order Status

  • Return Policy

  • Delivery Options

  • Tax Exemptions

  • Frequently Asked Questions

  • Contact Us

  • Recall Notices

  • Call:  (877) 718-6750

  • Mon - Sat: 7am - 9pm CT

  • Sun: 8am - 7pm CT

  • Closed Christmas Day

  • Who We Are

  • Investor Relations

  • Stewardship

  • Community

  • Military Support

  • Product Catalog

  • Tractor Supply Stores

  • .Pharmacy Verified Website

  • Careers

  • Sponsorship

  • Affiliate Program

  • Potential Vendor Partners

  • Vendor Information

  • Tractor Supply Media Network

  • About

  • Rewards

  • Hometown Heroes

  • Frequently Asked Questions

  • Terms & Conditions

  • TSC Credit Card

  • Klarna

Connect & Share with the Tractor Supply Community.

Shop on the go with the Tractor Supply App

Learn More
  • Privacy policy
  • Your Privacy Choices
  • Terms and Conditions
  • California Transparency Act
  • Legal Notices
  • Accessibility
  • Responsible Disclosure Statement
  • Surprise (Balance) Medical Billing Disclosure
  • Transparency in Coverage
  • Human Rights Policy
  • Vendor Code of Conduct
  • California Notice of Collection
  • Privacy Requests

© 2026, Tractor Supply Co. All Rights Reserved.