---
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: "HK$528"
currency: HKD
in_stock: true
reviews_count: 8
category: "Humboldts Secret"
url: https://www.desertcart.hk/products/72732290-humboldts-secret-tree-trunk-potassium-silicate-additive-liquid-fertilizer-thicker
store_origin: HK
region: Hong Kong
---

# 32 oz premium liquid fertilizer compatible with soil, coco & hydroponics fortifies stalks & branches for max strength 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:** HK$528
**Availability:** ✅ In Stock

## Summary

> 🌱 Grow Stronger, Grow Smarter — 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, 32 Ounce by humboldts secret
- **How much does it cost?** HK$528 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.hk](https://www.desertcart.hk/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 natural resistance to environmental stressors, keeping your garden thriving.
- • **Maximize Your Yield Potential:** Supports heavier flowers and fruit with improved nutrient uptake and branch development.
- • **Versatile Nutrient Powerhouse:** Works seamlessly in soil, coco, or hydroponic systems—grow anywhere, anytime.
- • **Trusted by Pros, Loved by Enthusiasts:** Made in the USA with premium ingredients, delivering consistent, reliable results every grow.
- • **Unbreakable Stalks, Unstoppable Growth:** Potassium silicate boosts cell wall strength for thicker, more resilient stems.

## 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. Compatible with soil, coco, and hydroponic systems, it supports vigorous growth and maximizes yield potential for both indoor and outdoor plants. Trusted by gardeners nationwide, this premium additive ensures healthier, more stable plants throughout every growth stage.

## 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

Review: Helps get thicker stems. - Works great for my indoor 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.

## 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.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0751K43Q2 |
| Best Sellers Rank | #27,502 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #902 in Garden Fertilizers |
| Brand | Humboldts Secret |
| Date First Available | August 22, 2017 |
| Global Trade Identification Number | 00706199757144 |
| Is Discontinued By Manufacturer | No |
| Item Form | Liquid |
| Item Weight | 2 pounds |
| Item model number | Secret Tree |
| Liquid Volume | 32 Fluid Ounces |
| Manufacturer | Humboldts Secret |
| Number of Items | 1 |
| Package Dimensions | 7.36 x 5.12 x 2.32 inches |
| Specific Uses For Product | Hydroponic,Plant Food |
| 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/61BWPmDtbaL.jpg)

## Available Options

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

## Customer Reviews

### ⭐⭐⭐⭐⭐ Helps get thicker stems.
*by A***Y on December 12, 2025*

Works great for my indoor garden.

### ⭐⭐⭐⭐⭐ 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.

### ⭐⭐⭐⭐⭐ Great to use for healthy plants
*by N***K on January 21, 2026*

Use this in conjunction with other Humboldt products in growing plants. Highly recommend .

## 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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**Shop now:** [https://www.desertcart.hk/products/72732290-humboldts-secret-tree-trunk-potassium-silicate-additive-liquid-fertilizer-thicker](https://www.desertcart.hk/products/72732290-humboldts-secret-tree-trunk-potassium-silicate-additive-liquid-fertilizer-thicker)

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*Product available on Desertcart Hong Kong*
*Store origin: HK*
*Last updated: 2026-03-07*