Neptune's Harvest Crab & Lobster Shell 12 lb - Natural Calcium Boost

In this review of Neptune's Harvest Crab & Lobster Shell 12 lb the bottom line is simple: this product is for gardeners who want a natural source of calcium and a way to improve soil structure without synthetic additives. The reviewer found it especially useful when mixed with kelp meal to increase organic matter and retain moisture, and noted it can help with nematode and fungus problems. While the smell earns mixed reactions, the practical benefits for tomatoes, vegetables and ornamental beds make it worth considering for organic gardeners.

Key Features

• Natural calcium source: Crab shell supplies calcium that helps prevent blossom end rot and supports healthy fruit development.
• Improves soil moisture retention: When combined with kelp meal it increases organic matter and helps soil hold moisture longer.
• Pest resistance benefit: The shells can deter slugs and snails and contribute to general pest resistance around vulnerable plants.
• Helps with soil pathogens: Users report it assists with nematode and fungus problems, improving overall root health.
• Organic gardening friendly: The product is a natural amendment suitable for gardeners seeking organic inputs.

Who It's For

This product suits home vegetable gardeners and small-scale growers who need an affordable, natural calcium amendment and who already use or plan to use kelp meal to improve soil organic matter. It is a practical choice for people growing tomatoes, peppers and other calcium-sensitive crops.

Those who prefer completely odorless amendments or need a quick-release chemical fertilizer should look elsewhere; the shell has an oceanic smell that some find off-putting and its benefits are gradual rather than immediate.

Pros & Cons

Pros

• Provides a natural source of calcium that supports fruiting and reduces blossom end rot.
• Combines well with kelp meal to increase organic matter and retain soil moisture.
• Reports of improved pest resistance, including deterring slugs and snails.

Cons

• Some users note a fishy or ocean-like smell that is not to every gardener's liking.
• Benefits are gradual and work best when used as part of a broader soil program with kelp meal or other amendments.

Specifications

Our Verdict

Neptune's Harvest Crab & Lobster Shell 12 lb is a cost-effective, natural way to boost calcium and improve soil structure, especially when paired with kelp meal. It is solid value for organic gardeners focused on long-term soil health and pest resistance, though those sensitive to strong oceanic smells or needing immediate nutrient boosts may prefer other options.

Frequently Asked Questions

Can I use this alone or must it be mixed with kelp meal?
You can apply it alone as a calcium amendment, but it delivers the best moisture retention and organic matter benefits when combined with kelp meal.

Will it immediately fix blossom end rot?
It helps prevent and correct calcium-related issues over time, but results are gradual rather than immediate; foliar calcium or quick-release products may be needed for urgent cases.

Does it smell strongly?
The scent is oceanic and receives mixed feedback-some gardeners accept it as part of a natural product, while others find it fishy.