---
product_id: 651120046
title: "Covington PRO-LINE Humic Acid, Fulvic Acid, Kelp Seaweed Fertilizer (1 Gallon), HFK-633 Superior Potassium Nitrate Root Growth Stimulant with Humic, Fulvic & Kelp Fertilizer for Plant & Tree Growth"
brand: "covington naturals"
price: "$183.00"
currency: USD
in_stock: true
url: https://www.desertcart.us/products/651120046-covington-pro-line-humic-acid-fulvic-acid-kelp-seaweed-fertilizer
store_origin: US
region: United States of America
---

# Seaweed Extract Root Strength Liquid Formula Covington PRO-LINE Humic Acid, Fulvic Acid, Kelp Seaweed Fertilizer (1 Gallon), HFK-633 Superior Potassium Nitrate Root Growth Stimulant with Humic, Fulvic & Kelp Fertilizer for Plant & Tree Growth

**Brand:** covington naturals
**Price:** $183.00
**Availability:** ✅ In Stock

## Summary

> 🌿 Grow Stronger, Thrive Together!

## Quick Answers

- **What is this?** Covington PRO-LINE Humic Acid, Fulvic Acid, Kelp Seaweed Fertilizer (1 Gallon), HFK-633 Superior Potassium Nitrate Root Growth Stimulant with Humic, Fulvic & Kelp Fertilizer for Plant & Tree Growth by covington naturals
- **How much does it cost?** $183.00 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/651120046-covington-pro-line-humic-acid-fulvic-acid-kelp-seaweed-fertilizer)

## Best For

- covington naturals enthusiasts

## Why This Product

- Trusted covington naturals brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Stress Defense:** Fortifies plants against heat and drought with kelp extract.
- • **Organic and Safe:** Natural ingredients ensure safety for plants and the environment.
- • **Universal Plant Care:** Perfect for gardens, lawns, and indoor plants alike.
- • **Nutrient-Rich Formula:** Enriches soil with humic and fulvic acid for optimal growth.
- • **Root Development Powerhouse:** Accelerates root depth and strength for vibrant plants.

## Overview

Covington Humic Acid, Fulvic Acid, Kelp Seaweed Fertilizer is a premium liquid fertilizer designed to enhance root development, enrich soil, and protect plants from environmental stressors. Its organic formulation is safe for all types of plants, making it an essential addition to any gardener's toolkit.

## Description

Covington PRO-LINE Humic Acid, Fulvic Acid, Kelp Seaweed Fertilizer (1 Gallon), HFK-633 Superior Potassium Nitrate Root Growth Stimulant with Humic, Fulvic & Kelp Fertilizer for Plant & Tree Growth

## Features

- Root Development Powerhouse: Infused with high-grade potassium nitrate, Covington Naturals HFK-633 accelerates root depth and strength, essential for plant vitality.
- Nutrient-Rich Humic Acid for Lawn & Garden: Our formula enriches your soil with humic and fulvic acid, imparting key nutrients and optimizing soil structure for maximal growth and health.
- Stress Defense with Liquid Seaweed Fertilizer: Derived from seaweed kelp extract, this growth stimulant fortifies plants against environmental stresses like heat and drought, ensuring robust growth with this kelp fertilizer for plants, lawns, and gardens.
- Universal Plant Care: Covington Naturals HFK-633 is adept for a diverse array of plants, enhancing lushness in gardens, lawns, and indoor foliage alike.
- Organic and Safe: Made from natural ingredients, it's safe for your plants and the environment. Easy to Use: Comes in liquid form for easy application and quick absorption.

## Product Details

- **Brand:** Covington Naturals
- **Item Form:** Liquid
- **Coverage:** Full
- **Liquid Volume:** 128 Fluid Ounces
- **Specific Uses For Product:** Root Development

## Images

![Covington PRO-LINE Humic Acid, Fulvic Acid, Kelp Seaweed Fertilizer (1 Gallon), HFK-633 Superior Potassium Nitrate Root Growth Stimulant with Humic, Fulvic & Kelp Fertilizer for Plant & Tree Growth - Image 1](https://m.media-amazon.com/images/I/712W4mMmCFL.jpg)
![Covington PRO-LINE Humic Acid, Fulvic Acid, Kelp Seaweed Fertilizer (1 Gallon), HFK-633 Superior Potassium Nitrate Root Growth Stimulant with Humic, Fulvic & Kelp Fertilizer for Plant & Tree Growth - Image 2](https://m.media-amazon.com/images/I/71NOcK+1rLL.jpg)
![Covington PRO-LINE Humic Acid, Fulvic Acid, Kelp Seaweed Fertilizer (1 Gallon), HFK-633 Superior Potassium Nitrate Root Growth Stimulant with Humic, Fulvic & Kelp Fertilizer for Plant & Tree Growth - Image 3](https://m.media-amazon.com/images/I/910PK06C4tL.jpg)
![Covington PRO-LINE Humic Acid, Fulvic Acid, Kelp Seaweed Fertilizer (1 Gallon), HFK-633 Superior Potassium Nitrate Root Growth Stimulant with Humic, Fulvic & Kelp Fertilizer for Plant & Tree Growth - Image 4](https://m.media-amazon.com/images/I/81oEQNBMp3L.jpg)
![Covington PRO-LINE Humic Acid, Fulvic Acid, Kelp Seaweed Fertilizer (1 Gallon), HFK-633 Superior Potassium Nitrate Root Growth Stimulant with Humic, Fulvic & Kelp Fertilizer for Plant & Tree Growth - Image 5](https://m.media-amazon.com/images/I/81Xgm1en4gL.jpg)

## Available Options

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

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**Shop now:** [https://www.desertcart.us/products/651120046-covington-pro-line-humic-acid-fulvic-acid-kelp-seaweed-fertilizer](https://www.desertcart.us/products/651120046-covington-pro-line-humic-acid-fulvic-acid-kelp-seaweed-fertilizer)

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*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-02-04*