BlackHūm 0-0-0.5 Limestone City Nutrients

Price range: $19.99 through $259.99

BlackHūm is a humic‑acid additive. Humic acid is a natural organic compound that improves how plants absorb micronutrients through the root zone.

Think of humic acid as a nutrient carrier and soil conditioner. It helps nutrients stay available, move more easily into the root, and creates a cleaner, more balanced environment for root growth.

What BlackHūm Does for Your Plants

1. Increases Micronutrient Uptake

Humic acid acts like a natural chelator. It binds to micronutrients (iron, zinc, manganese, copper, etc.) and keeps them in a form the plant can absorb.

This prevents:

  • nutrient lockout
  • wasted feed
  • slow or uneven growth

Your base nutrients simply work better.

2. Supports a Healthier, More Active Root Zone

Humic acid stimulates root activity and improves the structure of the root zone. Plants develop:

  • stronger roots
  • more feeder roots
  • better nutrient access

Healthy roots = healthy plants.

3. Detoxifies the Substrate

BlackHūm helps neutralize and bind:

  • excess salts
  • heavy metals
  • pesticide residues

This creates a cleaner, safer environment for roots — especially important in reused soil, coco, or hydro systems.

4. Improves Water Retention

Humic acid increases the substrate’s ability to hold moisture. Plants stay hydrated longer and experience less stress between waterings.

This is especially helpful in:

  • peat mixes
  • coco
  • sandy soils
  • hot or dry environments

5. Helps Stabilize pH

Humic acid naturally buffers the root zone. This reduces pH swings that can lock out nutrients and cause deficiencies.

A stable pH = consistent feeding.

6. Works in Any Growing System

BlackHūm performs reliably in:

  • soil
  • coco
  • peat mixes
  • hydroponics
  • foliar feeding

It’s compatible with all micronutrients and rooting products.

How You Use It

  • Mix 1–2 mL per litre of water
  • Use weekly or with every feeding
  • Safe for seedlings, veg, and flower
  • Adjust pH as needed
  • Can be used as a foliar spray

What’s Inside

  • Soluble potash (0.5% K₂O)
  • 10% humic acid derived from leonardite
  • Derived from potassium hydroxide
  • Manufactured in Canada

Description

BlackHūm is an organic humic‑acid additive that helps plants absorb micronutrients more efficiently through the root zone. Humic acid acts like a natural chelator, keeping essential nutrients available and helping the plant take them up more easily. This leads to healthier roots, stronger growth, and better overall performance in any growing system.

BlackHūm also supports a cleaner, more balanced substrate. It helps detoxify excess salts, heavy metals, and pesticide residues while improving water retention and buffering pH. This creates a more stable environment for roots to thrive.

What BlackHūm Does:

  • Increases micronutrient uptake
  • Supports a more active, healthier root zone
  • Detoxifies salts, heavy metals, and pesticide residues
  • Improves water retention in soil and substrates
  • Helps stabilize pH for more consistent feeding
  • Works in all growing media and hydroponic systems

Why It Matters:

Humic acid helps prevent nutrient lockout and keeps your feeding program running smoothly. When roots have access to clean, available nutrients, plants grow stronger, stay healthier, and respond better to your base nutrients.

How to Use It:

  • Mix 1–2 mL per litre of water
  • Use once per week or with every feeding
  • Suitable for seedlings, vegetative growth, and flowering
  • Adjust pH as needed
  • Compatible with all micronutrients and rooting gels
  • Can also be used as a foliar spray

What’s Inside:

  • Soluble potash (0.5% K₂O)
  • 10% humic acid derived from leonardite
  • Derived from potassium hydroxide

BlackHūm improves micronutrient uptake, cleans and conditions the root zone, stabilizes pH, and supports stronger, healthier growth in any growing system.

Additional information

Weight 5 lbs
Dimensions 10 × 8 × 6 in
size

1L, 4L, 20L