--- product_id: 514016291 title: "Humboldts Secret pH Down for Plants, Liquid pH Adjuster Formula, 32 Ounce" brand: "humboldts secret" price: "€ 77.84" currency: EUR in_stock: true category: "Humboldts Secret" url: https://www.desertcart.de/products/514016291-humboldts-secret-ph-down-for-plants-liquid-ph-adjuster-formula store_origin: DE region: Germany --- # 25% stronger concentration Optimal pH 5.5-6.5 balance 32 fl oz liquid formula Humboldts Secret pH Down for Plants, Liquid pH Adjuster Formula, 32 Ounce **Brand:** humboldts secret **Price:** € 77.84 **Availability:** ✅ In Stock ## Summary > 🌿 Unlock your garden’s secret weapon for unstoppable growth! ## Quick Answers - **What is this?** Humboldts Secret pH Down for Plants, Liquid pH Adjuster Formula, 32 Ounce by humboldts secret - **How much does it cost?** € 77.84 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.de](https://www.desertcart.de/products/514016291-humboldts-secret-ph-down-for-plants-liquid-ph-adjuster-formula) ## Best For - humboldts secret enthusiasts ## Why This Product - Trusted humboldts secret brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Stress-Free Growth:** Prevents nutrient lockout and deficiencies for healthier roots and lush foliage. - • **Precision pH Control:** Maintain perfect 5.5-6.5 pH for max nutrient uptake and vibrant growth. - • **Trusted Grower Quality:** Made in California with pure phosphoric acid—no dyes or additives. - • **Versatile Compatibility:** Works seamlessly in soil, coco, hydroponics (DWC, NFT) for year-round yields. - • **Ultra-Concentrated Formula:** Up to 25% stronger than competitors—less product, more power. ## Overview Humboldts Secret pH Down is a highly concentrated 32 oz liquid formula designed to quickly and precisely lower pH in soil, coco, and hydroponic systems. Maintaining an optimal pH range of 5.5 to 6.5, it prevents nutrient lockout and supports stronger, healthier plant growth. Up to 25% stronger than competitors, this professional-grade phosphoric acid solution is trusted by growers for consistent, stress-free results across all growing mediums. ## Description desertcart.com : Humboldts Secret pH Down for Plants, Liquid pH Adjuster Formula, 32 Ounce | Concentrated Phosphoric Acid Solution, Supports Nutrient Uptake, Soil, Coco & Hydroponics, Maintains 5.5-6.5 pH, Easy Feeding : Patio, Lawn & Garden ## Features - Packaging Update: You may receive previous or updated packaging during our transition. Same formula, same performance. Balance Your Grow Medium Fast - Our Humboldts Secret pH Down quickly and effectively lower pH in soil or coco to the optimal range for nutrient absorption. Prevents deficiencies and keeps plants stress-free while creating the right foundation for strong roots lush foliage and abundant harvests. - Fuel Stronger Healthier Growth: Maintain precise plant pH balance between 5.5 and 6.5 to prevent nutrient lockout and maximize vitality. Works for vegetables flowers and herbs in any medium helping your garden thrive from seedling to full production with consistent vibrant growth. - Highly Concentrated and Efficient: Just a small amount of our hydroponic pH down makes powerful lasting adjustments saving you time and money. Up to 25% stronger than some competitors this commercial grade formula ensures reliable results with minimal product use. - Versatile for All Growing Methods: Use Humboldts Secret pH Down in soil hydroponic systems like DWC and NFT coco coir or other grow mediums. Works seamlessly with your nutrient solution to support balanced feeding healthy stems and increased yields year round. - Expert Made Quality You Can Trust: Designed by growers for growers our concentrated pH down for plants uses high grade phosphoric acid and contains no dyes or additives. Proudly manufactured in California it delivers professional level results for every type of garden. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0BW3G96VV | | Best Sellers Rank | #26,214 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #743 in Garden Fertilizers | | Brand | Humboldts Secret | | Brand Name | Humboldts Secret | | Coverage | Medium | | Customer Reviews | 4.6 out of 5 stars 481 Reviews | | Item Form | Liquid | | Item Highlight | Concentrated Phosphoric Acid Solution, Supports Nutrient Uptake, Soil, Coco & Hydroponics, Maintains 5.5-6.5 pH, Easy Feeding | | Item Weight | 2.6 pounds | | Liquid Volume | 32 fluid ounces | | Manufacturer | HS Supplies, LLC | | Mixing Ratio | a few drops per unit of nutrient solution | | Model Number | HS-PH-DOWN | | Number of Items | 1 | | Number of Packs | 1 | | Specific Uses For Product | Plant Growth | | Target Species | plants | | UPC | 706199757427 | | Unit Count | 32 Fluid Ounces | ## Product Details - **Brand:** Humboldts Secret - **Item Form:** Liquid - **Item Weight:** 2.6 pounds - **Liquid Volume:** 32 fluid ounces - **Specific Uses For Product:** Plant Growth ## Images ![Humboldts Secret pH Down for Plants, Liquid pH Adjuster Formula, 32 Ounce - Image 1](https://m.media-amazon.com/images/I/71170RJlQnL.jpg) ![Humboldts Secret pH Down for Plants, Liquid pH Adjuster Formula, 32 Ounce - Image 2](https://m.media-amazon.com/images/I/71dfpGfFizL.jpg) ![Humboldts Secret pH Down for Plants, Liquid pH Adjuster Formula, 32 Ounce - Image 3](https://m.media-amazon.com/images/I/81dfgDoYI+L.jpg) ![Humboldts Secret pH Down for Plants, Liquid pH Adjuster Formula, 32 Ounce - Image 4](https://m.media-amazon.com/images/I/81YLYQYuiAL.jpg) ![Humboldts Secret pH Down for Plants, Liquid pH Adjuster Formula, 32 Ounce - Image 5](https://m.media-amazon.com/images/I/91TFAK06jGL.jpg) ## Available Options This product comes in different **Size** options. ## Frequently Bought Together - Humboldts Secret pH Down | Liquid pH Plant Balancer for Soil & Hydroponics Growing System - Humboldts Secret Tree Trunk - Silicate Additive - Advanced Nutrients - Helps Plants Flourish - Indoor Plant Food - Hydroponic Nutrients - Liquid Fertilizer (32 Ounce) - Humboldts Secret Sweet & Sticky – Carbohydrate and Saccharide Energy Source – Enhance Aroma and Flavor of Plants – Potting Soil for Indoor Plants – Energy for Plants – 32 Ounces --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.de/products/514016291-humboldts-secret-ph-down-for-plants-liquid-ph-adjuster-formula](https://www.desertcart.de/products/514016291-humboldts-secret-ph-down-for-plants-liquid-ph-adjuster-formula) --- *Product available on Desertcart Germany* *Store origin: DE* *Last updated: 2026-09-14*