---
product_id: 72732290
title: "Humboldts Secret Tree Trunk | Potassium Silicate Additive | Liquid Fertilizer for Thicker Stalks, Stress Resistance & Branch Development | Indoor & Outdoor Plant Food, Hydroponic Nutrients, 32 Ounce"
brand: "humboldts secret"
price: "€ 73.83"
currency: EUR
in_stock: true
category: "Humboldts Secret"
url: https://www.desertcart.it/products/72732290-humboldts-secret-tree-trunk-potassium-silicate-additive-liquid-fertilizer-thicker
store_origin: IT
region: Italy
---

# 32 fl oz premium liquid works in soil, coco & hydro fortifies stalks & branches Humboldts Secret Tree Trunk | Potassium Silicate Additive | Liquid Fertilizer for Thicker Stalks, Stress Resistance & Branch Development | Indoor & Outdoor Plant Food, Hydroponic Nutrients, 32 Ounce

**Brand:** humboldts secret
**Price:** € 73.83
**Availability:** ✅ In Stock

## Summary

> 🌱 Grow like a pro—stronger plants, bigger harvests, zero compromises!

## Quick Answers

- **What is this?** Humboldts Secret Tree Trunk | Potassium Silicate Additive | Liquid Fertilizer for Thicker Stalks, Stress Resistance & Branch Development | Indoor & Outdoor Plant Food, Hydroponic Nutrients, 32 Ounce by humboldts secret
- **How much does it cost?** € 73.83 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.it](https://www.desertcart.it/products/72732290-humboldts-secret-tree-trunk-potassium-silicate-additive-liquid-fertilizer-thicker)

## 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-Proof Your Plants:** Enhances resistance to environmental stress, keeping your garden thriving.
- • **Universal Growth Booster:** Compatible with soil, coco, and hydroponics—one formula for every grow setup.
- • **Maximize Branch Development:** Supports nutrient flow and branch strength to carry heavier flowers and fruits.
- • **Trusted by Pros & Enthusiasts:** Made in the USA with premium ingredients, backed by 863+ rave reviews.
- • **Stronger Stalks, Bigger Yields:** Potassium silicate boosts cell walls for thicker, more resilient plant structure.

## Overview

Humboldts Secret Tree Trunk is a 32-ounce potassium silicate liquid fertilizer designed to strengthen plant cell walls, resulting in thicker stalks, enhanced branch development, and improved stress resistance. Suitable for indoor and outdoor use, it works seamlessly in soil, coco, and hydroponic systems to maximize plant health and yield potential throughout all growth stages.

## 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, 32 Ounce : Patio, Lawn & 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 | B0751K43Q2 |
| Best Sellers Rank | #34,015 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #878 in Garden Fertilizers |
| Brand | Humboldts Secret |
| Brand Name | Humboldts Secret |
| Coverage | Medium |
| Customer Reviews | 4.6 out of 5 stars 863 Reviews |
| Global Trade Identification Number | 00706199757144 |
| Item Form | Liquid |
| Item Weight | 32 Ounces |
| Liquid Volume | 32 Fluid Ounces |
| Manufacturer | Humboldts Secret |
| Mixing Ratio | 1:2.5ml |
| Model Number | Secret Tree |
| Number of Items | 1 |
| Specific Uses For Product | Hydroponic,Plant Food |
| Target Species | plants |
| UPC | 706199757144 |
| Unit Count | 32.0 Ounce |

## Product Details

- **Brand:** Humboldts Secret
- **Item Form:** Liquid
- **Item Weight:** 32 Ounces
- **Liquid Volume:** 32 Fluid Ounces
- **Specific Uses For Product:** Hydroponic,Plant Food

## Images

![Humboldts Secret Tree Trunk | Potassium Silicate Additive | Liquid Fertilizer for Thicker Stalks, Stress Resistance & Branch Development | Indoor & Outdoor Plant Food, Hydroponic Nutrients, 32 Ounce - Image 1](https://m.media-amazon.com/images/I/71+bJRE-gGL.jpg)
![Humboldts Secret Tree Trunk | Potassium Silicate Additive | Liquid Fertilizer for Thicker Stalks, Stress Resistance & Branch Development | Indoor & Outdoor Plant Food, Hydroponic Nutrients, 32 Ounce - Image 2](https://m.media-amazon.com/images/I/71eVPI4Ld+L.jpg)
![Humboldts Secret Tree Trunk | Potassium Silicate Additive | Liquid Fertilizer for Thicker Stalks, Stress Resistance & Branch Development | Indoor & Outdoor Plant Food, Hydroponic Nutrients, 32 Ounce - Image 3](https://m.media-amazon.com/images/I/81crCMGqP-L.jpg)
![Humboldts Secret Tree Trunk | Potassium Silicate Additive | Liquid Fertilizer for Thicker Stalks, Stress Resistance & Branch Development | Indoor & Outdoor Plant Food, Hydroponic Nutrients, 32 Ounce - Image 4](https://m.media-amazon.com/images/I/81eBIxgyTNL.jpg)
![Humboldts Secret Tree Trunk | Potassium Silicate Additive | Liquid Fertilizer for Thicker Stalks, Stress Resistance & Branch Development | Indoor & Outdoor Plant Food, Hydroponic Nutrients, 32 Ounce - Image 5](https://m.media-amazon.com/images/I/91PwbZxXIML.jpg)

## Available Options

This product comes in different **Size** options.

## Frequently Bought Together

- 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
- Humboldts Secret Starter Kit Pack – World's Best Indoor & Outdoor Plant Fertilizer and Nutrient System: Base A & B – Golden Tree – Flower Stacker – Plant Enzymes – CalMag & Iron

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*Product available on Desertcart Italy*
*Store origin: IT*
*Last updated: 2026-07-06*