---
product_id: 3935029
title: "Neptune’s Harvest Organic Crab & Lobster Shell Multi-Purpose Plant Food (5-3-0) - 4 LB Resealable Bag - Rich in Nutrients Soil Fertilizer - Plant Food for Lawns, Gardens, and Vegetables"
brand: "neptune's harvest"
price: "AR$161105"
currency: ARS
in_stock: true
reviews_count: 8
category: "Neptune's Harvest"
url: https://www.desertcart.com.ar/products/3935029-neptune-s-harvest-organic-crab-and-lobster-shell-multi-purpose
store_origin: AR
region: Argentina
---

# Slow-release organic nutrients 17-23% Calcium boost Natural pest & fungus defense Neptune’s Harvest Organic Crab & Lobster Shell Multi-Purpose Plant Food (5-3-0) - 4 LB Resealable Bag - Rich in Nutrients Soil Fertilizer - Plant Food for Lawns, Gardens, and Vegetables

**Brand:** neptune's harvest
**Price:** AR$161105
**Availability:** ✅ In Stock

## Summary

> 🦀 Feed your soil like a pro — grow greener, stronger, and pest-free!

## Quick Answers

- **What is this?** Neptune’s Harvest Organic Crab & Lobster Shell Multi-Purpose Plant Food (5-3-0) - 4 LB Resealable Bag - Rich in Nutrients Soil Fertilizer - Plant Food for Lawns, Gardens, and Vegetables by neptune's harvest
- **How much does it cost?** AR$161105 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.ar](https://www.desertcart.com.ar/products/3935029-neptune-s-harvest-organic-crab-and-lobster-shell-multi-purpose)

## Best For

- neptune's harvest enthusiasts

## Why This Product

- Trusted neptune's harvest brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Natural Pest Control:** Chitin-rich formula helps keep root nematodes, grubs, ants, slugs, and fungus at bay without chemicals.
- • **Crab & Lobster Powerhouse:** Harness 17-23% calcium and 1.3-1.7% magnesium for robust plant growth and soil vitality.
- • **Organic Soil Health Booster:** Improves soil structure by aerating and retaining moisture while sequestering carbon naturally.
- • **Slow-Release Nutrient Magic:** Feeds your garden steadily all season long, promoting deep root development and healthier plants.
- • **Versatile & Easy Application:** Covers up to 1,000 sq. ft. per 10 lbs, perfect for lawns, garden beds, veggies, and indoor plants.

## Overview

Neptune’s Harvest Organic Crab & Lobster Shell Plant Food is a premium 5-3-0 dry fertilizer made from natural crab and lobster shells, delivering a rich source of calcium, magnesium, and chitin. Designed for organic gardeners, it supports long-term soil health, promotes deep root growth, and naturally controls pests and fungi. Packaged in a convenient resealable 4 lb bag, it’s ideal for lawns, gardens, and vegetables, providing slow-release nutrition that enhances soil structure and moisture retention.

## Description

Rose & Flowering Visit the Store Rose & Flowering Visit the Store Fish & Seaweed Fertilizer Visit the Store Fish & Seaweed Fertilizer Crab & Lobster Shell Visit the Store Crab & Lobster Shell Tomato & Veg Visit the Store Tomato & Veg Turf Formula Visit the Store Turf Formula Seaweed Plant Food Visit the Store Seaweed Plant Food Liquid Crab & Lobster Shell Visit the Store Liquid Crab & Lobster Shell Fish Fertilizer Visit the Store Fish Fertilizer

Review: Great product,works well - Love neptunes harvest products for my garden. This stuff stinks but is tolerable. I mix it in the soil before planting my veggies in the spring and it does wonders to the soil to help feed my plants.
Review: Looks good on the soil. - Plants liked it! And it's pretty on the soil. Hopefully nematodes don't like it.

## Features

- Combined for Maximum Growth: Neptune’s Harvest Organic Crab & Lobster Shell fertilizer is an excellent dry organic plant food made from natural crab and lobster shell meal; this organic fertilizer supports lawns, garden beds, bulbs, indoor and outdoor plants and vegetables by supplying calcium, magnesium, and nitrogen that work with soil to support long-term soil health and steady performance throughout the growing season and is safe for kids and pets
- Power of Crab & Lobster Shell: Crafted entirely from crab and lobster shell meal, this organic plant fertilizer contains 17–23% calcium and 1.3–1.7% magnesium and is naturally high in chitin (kite-en); this mineral-rich profile supports soil nutrition while also helping control root nematodes, grubs, ants, slugs, and fungus, making it a dependable choice for gardeners managing soil conditions organically
- How to Use: This crab meal organic fertilizer can be worked into soil before planting or applied as a top dressing to established plants; suitable for lawns using a broadcast spreader, garden beds, compost, potting mixes, seedbeds, and bedding plants; one 10 lb bag covers up to 1,000 sq. ft., making it easy to apply across multiple growing areas and gardening routines. For enhanced results, pair with our Kelp Meal to increase overall benefits
- Supports Soil Performance: This organic fertilizer breaks down slowly for natural slow release, adds organic matter to soil, helps soil drain yet retain moisture, helps sequester carbon and aerates soil to give roots room to move and breathe; roots reach deep to access shell chucks as a food source, supporting deeper root systems over time while improving overall soil structure; generically approved by OMRI for organic production
- Package Contents: Neptune’s Harvest Organic Crab & Lobster Shell Multi-Purpose Plant Food (5-3-0) - 4 lb Resealable Bag (Pack of 1)

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Best Sellers Rank | #10,281 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #428 in Garden Fertilizers |
| Brand | Neptune's Harvest |
| Customer Reviews | 4.8 out of 5 stars 1,226 Reviews |
| Global Trade Identification Number | 00081435506046 |
| Item Form | Flake |
| Liquid Volume | 1.8 Kilograms |
| Manufacturer | Neptune's Harvest |
| Specific Uses For Product | Plant Growth, Root Development, Seed Development, Soil Conditioning |

## Product Details

- **Brand:** Neptune's Harvest
- **Item Weight:** 4 Pounds
- **Item Form:** Powder
- **Liquid Volume:** 1
- **Specific Uses For Product:** Lawn,Organic

## Images

![Neptune’s Harvest Organic Crab & Lobster Shell Multi-Purpose Plant Food (5-3-0) - 4 LB Resealable Bag - Rich in Nutrients Soil Fertilizer - Plant Food for Lawns, Gardens, and Vegetables - Image 1](https://m.media-amazon.com/images/I/71wtkJu6biL.jpg)

## Available Options

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

## Questions & Answers

**Q: what is chitin?**
A: Chitin is most commonly recognizable as the hard whitish parts of a crab shell although it is one of the the main substances in many exoskeletons (creatures that are hard on the outside-- like crabs, lobsters and many insects-- have exoskeletons rather than internal bones).

**Q: When putting a plant in the ground, should this be put around the roots or near the top of the soil? All tips appreciated!**
A: Hi there, we generously applied the shells to the top of the soil of our raised beds and then tilled in to a depth of about 6-8". We found that this product really helped us with the calcium deficiency we were having here in Colorado, causing end-rot on our tomatoes and peppers. I think we will try applying it around the base of our plants as needed  (after big rain events) next year too because, even though it helped tremendously, a few of our plants still had some problems. I think either application of the shells, around roots or top, will work, depending on the severity and nature of your problem or your fertilizing needs. Hope this helps a little.

**Q: I assume the crab has been cooked in some way before the shell is removed.  Does anyone know how the shell is processed?**
A: I doubt it's been processed. It's simply crushed crab and crab shell. Smells like it too. Ingredients: Crushed crab and crab shell.

**Q: Can this product be used as fertilizer for my spring bulbs ?**
A: Yes, it is a fertilizer. A light fertilizer. IngredientsNitrogen Total N (2.63%), Phosphate Total P205 (3.23%), Potash K20 (0.28%), Sulfur (0.2%), Magnesium (1.33%), Calcium (22.95%), Sodium (0.53%), Iron (3239 ppm), Manganese (56 ppm), Copper (23 ppm), Zinc (45 ppm), moisture (10.29%), pH (6)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Great product,works well
*by B***T on November 14, 2025*

Love neptunes harvest products for my garden. This stuff stinks but is tolerable. I mix it in the soil before planting my veggies in the spring and it does wonders to the soil to help feed my plants.

### ⭐⭐⭐⭐⭐ Looks good on the soil.
*by D***S on November 25, 2025*

Plants liked it! And it's pretty on the soil. Hopefully nematodes don't like it.

### ⭐⭐⭐⭐⭐ Smelly, but that's a good thing.
*by R***S on August 9, 2025*

This stuff stinks, but that's to be expected since it's crushed lobster anf crab. But it's easy to cover with a little soil, and you want this to be natural and not processed. I use it with my plants and it seems to help. I understand it keeps harmful nematodes away from plants. It's easy to spread, I mix it into my soil mix.

## Frequently Bought Together

- Neptune's Harvest Crab & Lobster Shell, 4 lb
- Neptune's Harvest Tomato & Veg Fertilizer 2-4-2, 36 oz
- Neptune's Harvest Kelp Meal Multi-Purpose Plant Food 1-0-2, 4 lb

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*Product available on Desertcart Argentina*
*Store origin: AR*
*Last updated: 2026-03-03*