---
product_id: 164619758
title: "Humboldts Secret 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: "23490 kr"
currency: ISK
in_stock: true
url: https://www.desertcart.is/products/164619758-humboldts-secret-tree-trunk-potassium-silicate-additive-liquid-fertilizer-thicker
store_origin: IS
region: Iceland
---

# Boosts stress resistance & growth 1 gal premium potassium silicate Thicker stalks & stronger branches Humboldts Secret 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:** 23490 kr
**Availability:** ✅ In Stock

## Summary

> 🌱 Grow Strong, Stand Tall — Don’t Let Your Garden Miss Out!

## 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, 1 Gallon by humboldts secret
- **How much does it cost?** 23490 kr with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.is](https://www.desertcart.is/products/164619758-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

- • **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

Humboldts Secret Tree Trunk | Potassium Silicate Additive | Liquid Fertilizer for Thicker Stalks, Stress Resistance & Branch Development | Indoor & Outdoor Plant Food, Hydroponic Nutrients, 1 Gallon

## Features

- Plant Strength & Stability: Humboldt 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.

## Product Details

- **Brand:** Humboldts Secret
- **Item Weight:** 128 Ounces
- **Item Form:** Liquid
- **Liquid Volume:** 128 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, 1 Gallon - Image 1](https://m.media-amazon.com/images/I/61BWPmDtbaL.jpg)

## Available Options

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

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*Product available on Desertcart Iceland*
*Store origin: IS*
*Last updated: 2026-03-13*