Neptune’s Harvest Organic Crab & Lobster Shell Plant Food 5-3-0 - 4 lb Bag

Discover Neptune’s Harvest Organic Crab & Lobster Shell Multi-Purpose Plant Food, a dry organic fertilizer designed to nourish soil and plants across lawns, garden beds, vegetables, and ornamental plantings. Made entirely from crab and lobster shell meal, this formula delivers a calcium-rich profile with magnesium to support soil biology and steady growth through the season without synthetic additives.

Why this nutrient source stands out

Crafted from crab and lobster shell meal, the product provides a calcium range of 17 to 23 percent along with magnesium in the 1.3 to 1.7 percent range. This mineral-rich mix supports soil nutrition while also being positioned as a tool for organic gardeners seeking soil balance. A naturally occurring chitin content adds further value to soil life and can contribute to pest management in an integrated, chemical-free approach.

Key benefits

• Dry organic fertilizer derived from crab and lobster shell meal
• Calcium 17-23% and magnesium 1.3-1.7% for balanced nutrition
• Slow-release formula supports long-term soil health
• OMRI generic approved for organic production

How to use and coverage

• Mix into soil before planting or top-dress established plants
• Ideal for lawns with a broadcast spreader for even application
• One 4 lb bag covers up to 1,000 sq ft; coverage scales with bag size
• Pair with Kelp Meal for enhanced overall benefits

Soil performance and long-term health

This organic fertilizer breaks down gradually for natural slow release and adds organic matter that can improve drainage while retaining moisture. Roots can explore deeper as soil structure improves, supporting healthier root systems over time.

What you get and practical tips

One 4 lb resealable bag designed for versatile use across lawns, beds, bulbs, and vegetables, with a focus on safe handling for households of all kinds.

Real-life use scenarios

Imagine a sunlit lawn where the product is evenly spread in early spring, inviting a vibrant canopy by mid-season. In a kitchen garden, a light top-dress around each bed supports steady vegetable vigor. For indoor containers, a gentle mix into the topsoil helps maintain balanced growth without sudden shifts in moisture or nutrients.