--- product_id: 164619758 title: "Tree Trunk | Potassium Silicate Additive | Liquid Fertilizer for Thicker Stalks, Stress Resistance & Branch Development | Indoor & Outdoor Plant Food, Hydroponic Nutrients, 1 Gallon" brand: "humboldts secret" price: "$215.75" currency: USD in_stock: true reviews_count: 8 category: "Humboldts Secret" url: https://www.desertcart.us/products/164619758-tree-trunk-potassium-silicate-additive-liquid-fertilizer-for-thicker-stalks store_origin: US region: United States of America --- # Boosts stress resistance & growth 1 gal premium potassium silicate Thicker stalks & stronger branches Tree Trunk | Potassium Silicate Additive | Liquid Fertilizer for Thicker Stalks, Stress Resistance & Branch Development | Indoor & Outdoor Plant Food, Hydroponic Nutrients, 1 Gallon **Brand:** humboldts secret **Price:** $215.75 **Availability:** ✅ In Stock ## Summary > 🌱 Grow Strong, Stand Tall — Don’t Let Your Garden Miss Out! ## Quick Answers - **What is this?** Tree Trunk | Potassium Silicate Additive | Liquid Fertilizer for Thicker Stalks, Stress Resistance & Branch Development | Indoor & Outdoor Plant Food, Hydroponic Nutrients, 1 Gallon by humboldts secret - **How much does it cost?** $215.75 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/164619758-tree-trunk-potassium-silicate-additive-liquid-fertilizer-for-thicker-stalks) ## 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 - • **Maximize Yield Potential:** Supports heavier flowers and fruits by enhancing plant stability and nutrient uptake. - • **Stress-Proof Your Garden:** Boosts resilience against environmental stressors, ensuring vigorous growth at every stage. - • **All-Grow Medium Compatible:** Perfect for soil, coco, or hydroponics—versatile for any indoor or outdoor garden setup. - • **Trusted by Pros Nationwide:** Made in the USA with premium ingredients, delivering consistent, reliable results every time. - • **Fortify Your Plants’ Backbone:** Premium potassium silicate strengthens cell walls for thicker stalks and robust branches. ## Overview Humboldts Secret Tree Trunk is a 1-gallon liquid potassium silicate fertilizer designed to strengthen plant cell walls, resulting in thicker stalks, stronger branches, and improved stress resistance. Compatible with soil, coco, and hydroponic systems, it enhances nutrient uptake and supports heavier flowers and fruits, making it ideal for both indoor and outdoor plants. Trusted by gardeners across the USA for consistent, premium-quality performance. ## Description desertcart.com : Humboldts Secret Tree Trunk | Potassium Silicate Additive | Liquid Fertilizer for Thicker Stalks, Stress Resistance & Branch Development | Indoor & Outdoor Plant Food, Hydroponic Nutrients, 1 Gallon : Patio, Lawn & Garden Review: Just look for yourself - This stuff does exactly what it says it will. It really was a game changer for me. Never seen my plants so healthy and thriving through out the whole grow. Made stocks and stems super hard and strong and even made the leaves strong no BS and cheaper than most others I have bought. Review: Helps get thicker stems. - Works great for my indoor garden. ## Features - Packaging Update: You may receive previous or updated packaging during our transition. Same formula, same performance. Plant Strength & Stability - Humboldts Secret Tree Trunk is a premium silicate additive that fortifies plant cell walls, producing thicker stalks and stronger branches. By supporting heavier flowers and fruit, it enhances stability, improves overall plant health, and helps maximize yield potential in any growing environment. - Enhanced Growth Performance: This silica for plants provides advanced nutrients that improve stem structure and boost resilience. By strengthening natural growth processes, it helps indoor and outdoor plants thrive in soil, coco, or hydroponic systems while delivering vigorous, healthy development across every growth stage. - Thicker Stalks & Better Branching: Tree Trunk liquid fertilizer supports stronger nutrient uptake, encouraging sturdy stalks and abundant branch development. This results in improved architecture, better nutrient flow, and increased capacity to support heavy flowers and fruits through both vegetative and flowering cycles. - Trusted by Gardeners Everywhere: Humboldts Secret Nutrients are made in the USA with premium-quality ingredients trusted by hundreds of thousands of gardeners. Known for delivering consistent, reliable results, this formula strengthens plants, promotes stable yields, and ensures lasting performance in both indoor and outdoor gardens. - Versatile & Easy to Use: Derived from potassium silicate, this liquid silica for plants is compatible with all grow mediums including soil, coco, and hydroponics. Simply apply 2.5–5 ml per gallon (5 ml ≈ 1 teaspoon) with every or every other watering to boost plant strength throughout the entire grow cycle. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B07523V87L | | Best Sellers Rank | #39,632 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #1,137 in Garden Fertilizers | | Brand Name | Humboldts Secret | | Coverage | Medium | | Customer Reviews | 4.6 4.6 out of 5 stars (855) | | Global Trade Identification Number | 00706199757151 | | Item Form | Liquid | | Item Weight | 128 Ounces | | Liquid Volume | 128 Fluid Ounces | | Manufacturer | Humboldts Secret | | Mixing Ratio | 2.5-5 mL per gallon | | Model Number | 706199757144 | | Specific Uses For Product | Hydroponic,Plant Food | | Target Species | plants | | UPC | 706199757151 | | Unit Count | 128 Fluid Ounces | ## Product Details - **Brand:** Humboldts Secret - **Item Form:** Liquid - **Item Weight:** 128 Ounces - **Liquid Volume:** 128 Fluid Ounces - **Specific Uses For Product:** Hydroponic,Plant Food ## Images ![Tree Trunk | Potassium Silicate Additive | Liquid Fertilizer for Thicker Stalks, Stress Resistance & Branch Development | Indoor & Outdoor Plant Food, Hydroponic Nutrients, 1 Gallon - Image 1](https://m.media-amazon.com/images/I/71GUHIVJdCL.jpg) ![Tree Trunk | Potassium Silicate Additive | Liquid Fertilizer for Thicker Stalks, Stress Resistance & Branch Development | Indoor & Outdoor Plant Food, Hydroponic Nutrients, 1 Gallon - Image 2](https://m.media-amazon.com/images/I/71hgwppZqxL.jpg) ![Tree Trunk | Potassium Silicate Additive | Liquid Fertilizer for Thicker Stalks, Stress Resistance & Branch Development | Indoor & Outdoor Plant Food, Hydroponic Nutrients, 1 Gallon - Image 3](https://m.media-amazon.com/images/I/81gjdaP95oL.jpg) ![Tree Trunk | Potassium Silicate Additive | Liquid Fertilizer for Thicker Stalks, Stress Resistance & Branch Development | Indoor & Outdoor Plant Food, Hydroponic Nutrients, 1 Gallon - Image 4](https://m.media-amazon.com/images/I/817jfZSlPgL.jpg) ![Tree Trunk | Potassium Silicate Additive | Liquid Fertilizer for Thicker Stalks, Stress Resistance & Branch Development | Indoor & Outdoor Plant Food, Hydroponic Nutrients, 1 Gallon - Image 5](https://m.media-amazon.com/images/I/91PwbZxXIML.jpg) ## Available Options This product comes in different **Size** options. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Just look for yourself *by J***N on April 26, 2025* This stuff does exactly what it says it will. It really was a game changer for me. Never seen my plants so healthy and thriving through out the whole grow. Made stocks and stems super hard and strong and even made the leaves strong no BS and cheaper than most others I have bought. ### ⭐⭐⭐⭐⭐ Helps get thicker stems. *by A***Y on December 12, 2025* Works great for my indoor garden. ### ⭐⭐⭐⭐⭐ Healthy plants start from the stalk up. *by R***T on April 16, 2026* Great Stuff and strong plants. --- ## 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.us/products/164619758-tree-trunk-potassium-silicate-additive-liquid-fertilizer-for-thicker-stalks](https://www.desertcart.us/products/164619758-tree-trunk-potassium-silicate-additive-liquid-fertilizer-for-thicker-stalks) --- *Product available on Desertcart United States of America* *Store origin: US* *Last updated: 2026-05-09*