---
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: "€ 78.37"
currency: EUR
in_stock: true
reviews_count: 9
category: "Neptune's Harvest"
url: https://www.desertcart.it/products/3935029-neptune-s-harvest-organic-crab-and-lobster-shell-multi-purpose
store_origin: IT
region: Italy
---

# Slow-release organic N-P-K 5-3-0 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:** € 78.37
**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?** € 78.37 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.it](https://www.desertcart.it/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 content helps keep root nematodes, grubs, ants, slugs, and fungus at bay—no harsh chemicals needed.
- • **Crab & Lobster Powerhouse:** Harness the mineral-rich shell meal for superior calcium and magnesium soil nutrition.
- • **Slow-Release Nutrient Boost:** Feeds your plants steadily all season long with organic nitrogen and essential nutrients.
- • **Organic Soil Health Enhancer:** Improves soil structure by aerating and increasing moisture retention for deeper root growth.
- • **Versatile & Easy Application:** Perfect for lawns, gardens, veggies, and indoor plants; covers up to 1,000 sq. ft. per 10 lbs.

## Overview

Neptune’s Harvest Organic Crab & Lobster Shell Multi-Purpose Plant Food is a premium 5-3-0 organic fertilizer made from natural crab and lobster shell meal. Rich in calcium (17-23%) and magnesium (1.3-1.7%), it supports long-term soil health, promotes deep root development, and naturally controls pests and fungi. Its slow-release formula enhances soil aeration and moisture retention, making it ideal for lawns, gardens, vegetables, and indoor plants. Packaged in a convenient 4 lb resealable bag, it’s OMRI-listed for organic gardening and covers up to 1,000 sq. ft. per 10 lbs.

## Description

Buy 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: Fertilizers & Plant Food - desertcart.com ✓ FREE DELIVERY possible on eligible purchases

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: Good Natural Fertilizer - Fair price, allegedly all natural fertilizer. I suggest adding it when preparing the soil with other natural fertilizers. Takes time to break down.

## 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 |
|---------------|-------|
| ASIN | B006GK5ON6 |
| Best Sellers Rank | #2,153 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #115 in Garden Fertilizers |
| Brand Name | Neptune's Harvest |
| Coverage | Medium |
| Customer Reviews | 4.8 4.8 out of 5 stars (1,239) |
| Global Trade Identification Number | 00081435506046 |
| Included Components | Neptune's Harvest Crab & Lobster Shell, 4 lb |
| Item Form | Flake |
| Item Type Name | Neptune's Harvest Crab & Lobster Shell, 4 lb |
| Liquid Volume | 1.8 Kilograms |
| Manufacturer | Neptune's Harvest |
| Mixing Ratio | 5-3-0 |
| Model Number | CS604 |
| Number of Items | 1 |
| Part Number | CS 604 |
| Specific Uses For Product | Plant Growth, Root Development, Seed Development, Soil Conditioning |
| Target Species | Bird |
| UPC | 081435506046 617407739725 |
| Unit Count | 64.0 Ounce |
| Warranty Description | Warranty |

## Product Details

- **Brand:** Neptune's Harvest
- **Global Trade Identification Number:** 00081435506046
- **Item Form:** Flake
- **Liquid Volume:** 1.8 Kilograms
- **Specific Uses For Product:** Plant Growth, Root Development, Seed Development, Soil Conditioning

## 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.

### ⭐⭐⭐⭐⭐ Good Natural Fertilizer
*by C***G on April 7, 2026*

Fair price, allegedly all natural fertilizer. I suggest adding it when preparing the soil with other natural fertilizers. Takes time to break down.

### ⭐⭐⭐⭐⭐ Kills Grubs!
*by B***H on March 4, 2026*

I got this to kill grubs in my flower beds. It seems to be working. I couldn't be happier.

## 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 Italy*
*Store origin: IT*
*Last updated: 2026-05-09*