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 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

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

Product ID: 3935029

Details

Brand
Neptune's
Global Trade Identification Number
Item Form
Flake
Liquid Volume
1.8 kg
Specific Uses For Product
Plant Growth

🌱Slow-release organic nutrition

🌿Controls pests & improves soil

🦀17-23% Calcium boost

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Description

🦀 Feed your soil like a pro—organic power from the sea for unstoppable growth!

ORGANIC PEST DEFENSE - Naturally rich in chitin to help control root nematodes, grubs, ants, slugs, and fungus—garden protection you can trust.
CRAB LOBSTER POWERHOUSE - Harness 17-23% calcium and 1.3-1.7% magnesium from natural shell meal for robust plant growth.
ECO FRIENDLY SOIL ENHANCER - Improves soil structure by aerating, retaining moisture, and sequestering carbon—grow greener, grow smarter.
SLOW RELEASE NUTRIENT MAGIC - Feeds your soil steadily all season long, promoting deep roots and healthier plants without chemical overload.
VERSATILE EASY APPLICATION - Perfect for lawns, garden beds, bulbs, and veggies; covers up to 1,000 sq. ft. per 10 lbs for effortless, widespread use.

Neptune’s Harvest Organic Crab & Lobster Shell Multi-Purpose Plant Food is a premium 5-3-0 dry fertilizer made from natural crab and lobster shells. Rich in calcium, magnesium, and chitin, it supports long-term soil health, pest control, and steady nutrient release. Ideal for lawns, gardens, and vegetables, it enhances soil structure and root development while being safe for kids and pets. Packaged in a convenient 4 lb resealable bag, it covers medium-sized growing areas and is OMRI-approved for organic gardening.

Specifications

ASIN	B006GK5ON6
Best Sellers Rank	#10,503 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #385 in Garden Fertilizers
Brand Name	Neptune's Harvest
Coverage	Medium
Customer Reviews	4.8 4.8 out of 5 stars (1,260)
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 kg
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 Ounce
Warranty Description	Warranty

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S$85

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In stock

Sold byAmazon SINGAPOREDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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TrustScore 4.5 | 7,300+ reviews

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