1 7

HumboldtsSecretSupplies

Humboldts Secret Tree Trunk - Silicate Additive - Advanced Nutrients - Helps Plants Flourish - Indoor Plant Food - Hydroponic Nutrients - Liquid Fertilizer (8 Ounce)

Humboldts Secret Tree Trunk - Silicate Additive - Advanced Nutrients - Helps Plants Flourish - Indoor Plant Food - Hydroponic Nutrients - Liquid Fertilizer (8 Ounce)

$25.00 USD
$25.00 USD
Sale Sold out

About This

  • PREMIUM POTASSIUM SILICATE-BASED PRODUCT: Tree Trunk features advanced nutrients that will help the plants natural ability to strengthen its cell walls, resulting in thicker stalks and better branch development, as well as abiotic stress tolerance!
  • PLANT STRENGTH: Watch your plants grow by applying Tree Trunk liquid fertilizer. Hydroponic nutrients make our product suitable as quality indoor plant food.
  • ABIOTIC STRESS TOLERANCE: Tree Trunk is needed to ensure yield stability under abiotic stress and minimizes the environmental impacts on crop production.
  • COMPATIBLE IN ALL GROW MEDIUMS: This formula makes for an excellent indoor plant fertilizer suitable for all grow mediums. The usage rate is between 2.5-5ml/gallon (5ml is approx. 1 teaspoon) throughout the entire grow cycle.
  • THICK STALKS & BETTER BRANCH DEVELOPMENT: Our healthy liquid fertilizer will help your plants natural ability to achieve sturdy, thick silks as well as strong and abundant branches.

Overview

  • Brand : Humboldts Secret
  • Item Weight : 8 Ounces
  • Item Form : Liquid
  • Coverage : Whole grow cycle; all grow media
  • Liquid Volume : 8 Fluid Ounces
View full details

Collections

🌱 Grow With Care. Grow With Joy. GrowCottage. 🌱

Whether you’re cultivating your first herb garden, designing a backyard retreat, or searching for the perfect gift for a fellow plant lover, GrowCottage is here to bring beauty and growth into your life.

SHOP NOW
Gardening tools

We partner with trusted growers and focus on eco-friendly, reliable products


At GrowCottage, we believe gardening is more than a hobby—it’s a way to nurture life, create beauty, and find peace in every season. Our mission is to provide high-quality garden essentials that inspire growth, creativity, and a deeper connection with nature.

SHOP NOW

Review

  • ⭐️⭐️⭐️⭐️⭐️

    The indoor plant starter kit was super beginner-friendly and came with everything I needed. My windowsill looks amazing now.
    Tom W.

  • ⭐️⭐️⭐️⭐️⭐️

    Loved the variety of seeds! Everything sprouted beautifully and the instructions were really clear.
    Nina P.

  • ⭐️⭐️⭐️⭐️⭐️

    The ceramic pots I ordered are stunning — sturdy, stylish, and perfect for my succulents. Will be back for more.
    Eric L.

Blog posts

1 3

Frequently Asked Question

How long does shipping take?

Shipping takes place within 3-5 business days. If there is a problem with the shipment of the product, we will notify you via the email address you entered when ordering.

Is free shipping available?

We do not currently offer free shipping. However, this may be added at some point. We apologize.

How can I get a tracking number for my order?

If your order has been shipped, we will add the tracking number to your order and notify you via the email address you entered when ordering.

How do I process a return or exchange?

For returns or exchanges, please contact us within 14 days of receiving the product, along with a receipt or screenshot of the purchase, and a photo of the product with the packaging or tag intact.