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).

When putting a plant in the ground, should this be put around the roots or near the top of the soil? All tips appreciated!

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.

I assume the crab has been cooked in some way before the shell is removed. Does anyone know how the shell is processed?

I doubt it's been processed. It's simply crushed crab and crab shell. Smells like it too. Ingredients: Crushed crab and crab shell.

Can this product be used as fertilizer for my spring bulbs ?

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)

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Neptune's Harvest Crab & Lobster Shell, 4 lb

Neptune's Harvest Crab & Lobster Shell, 4 lb

Product ID: 254135239

Details

Brand
Neptune's
Item form
Powder
Item weight
1.81 Kilograms
Liquid volume
1.8 Kilograms
Specific uses for product
Lawn Care

🌿17% calcium boost

💧Enhances soil moisture retention

🦀5-3-0 NPK power

₨1769

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Description

🦞 Elevate your lawn game with ocean-powered organic strength!

MOISTURE MAGNET - Works synergistically with kelp meal to lock in soil moisture and boost organic matter
ORGANIC NPK POWERHOUSE - Feeds your lawn with a balanced 5-3-0 nutrient blend for vibrant growth
CALCIUM RICH SOIL ENHANCER - Delivers 17% calcium to strengthen plant cell walls and improve soil health
ECO FRIENDLY SUSTAINABLE - Made from real crab and lobster shells, supporting a greener, chemical-free lawn care routine
NATURAL PEST FUNGUS DEFENSE - Helps combat nematodes and fungal issues naturally, keeping your garden thriving

Neptune's Harvest Crab & Lobster Shell is a premium 4 lb organic fertilizer powder delivering a potent 5-3-0 NPK ratio, enriched with 17% calcium and 1% magnesium. Designed to naturally improve soil health, it combats nematodes and fungi while enhancing moisture retention when paired with kelp meal. Ideal for professional-grade lawn care, it supports sustainable, chemical-free gardening with proven customer satisfaction.

Specifications

ASIN	B006GK5ON6
Application Method	Broadcast spreader
Best Sellers Rank	#53,549 in Pet Supplies ( See Top 100 in Pet Supplies ) #791 in Bird Food
Brand	Neptune's Harvest
Brand Name	Neptune's Harvest
Coverage	Medium
Customer Reviews	4.8 out of 5 stars 989 Reviews
Global Trade Identification Number	00081435506046
Included Components	fertilizers
Item Form	Powder
Item Type Name	Neptune's Harvest CS604 Crab Shell Multi-Purpose Plant Food 2-3-0 4lb
Item Weight	1.81 Kilograms
Item form	Powder
Item weight	1.81 Kilograms
Liquid Volume	1.8 Kilograms
Liquid volume	1.8 Kilograms
Manufacturer	Neptune's Harvest
Mixing Ratio	5-3-0
Model Number	CS604
Number of Items	1
Number of Packs	1
Part Number	CS 604
Specific Uses For Product	Lawn Care
Specific uses for product	Lawn Care
Target Species	plants
UPC	081435506046 617407739725
Unit Count	1 Count

Reviews

A**R

Five Stars

This has made a fantastic addition to my organic soil mix.

7.06.2017

C**G

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.

7.04.2026

P**T

Strong Odor

Be prepared for the strong fishy smell. It'll attract flies to your garden. Once I covered veggie plants with mulch, it cut down the fishy odor. I'm assuming it's working. This is my first time using the product.

22.07.2026

D**E

Works Beautifully

It definitely helped my tomatoe plants here in Eastern NC. I just bought some more for growing microgreens and was a bit disappointed at how chunky it is compared to my first order. A little more powdery would be helpful. Maybe I got the top of the barrel this time around. Otherwise very happy with the product and its results

7.08.2026

K**N

Absolutely

How could you not like this stuff. It’s natural and plants love it. No synthetic fertilizers. Makes you feel more comfortable eating right out of the garden

11.06.2026

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Trustpilot

TrustScore 4.5 | 7,300+ reviews

Yusuf A.

Fantastic experience overall. Will recommend to friends and family.

1 month ago

Anjali K.

The product quality is outstanding. Exactly what I needed for my work.

1 month ago

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₨1769

Duties & taxes included

In stock

Sold byAmazon SeychellesDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Seychelles.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Sneha T.

Received my product in pristine condition. Great service overall.

1 month ago

Abdullah B.

Great price for an authentic product. Fast international shipping too!

3 weeks ago

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