Prevent Blossom End Rot Naturally

Eggshell Calcium Calculator

Crush the competition (not just eggshells)! Calculate the perfect amount of calcium-rich eggshell fertilizer to strengthen your plants—no more guesswork.

How Many Eggshells Do Your Plants Need?

Our calculator tailors amounts to your specific garden—whether you’re fighting blossom end rot in tomatoes or boosting leafy greens. No more guessing—just thriving plants.

Pro Tip: One eggshell can nourish 3 plants for months!

Prevents deficiencies: 1 crushed shell ≈ 900mg calcium carbonate (enough for 3 tomato plants)
Works with any egg type: Chicken, duck, or quail—all provide the same benefits
Eggshell Calcium Calculator | Gardener’s Tool Shed

Eggshell Calcium Calculator

Prevent blossom end rot naturally! Calculate how many eggshells your plants need.

Pro Tip: Bake shells at 300°F (150°C) for 10 minutes to sterilize before crushing!

1 eggshell ≈ 900mg calcium carbonate. Our calculator adjusts for your specific plants to prevent deficiencies:

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Benefits

Why Eggshells Belong in Your Garden

Eggshells aren’t trash—they’re garden gold! These free, nutrient-packed shells:

Fights Blossom End Rot: Tomato/pepper plants absorb calcium gradually from crushed shells
Deter slugs & snails: The sharp edges naturally repel pests.
Improves Soil Structure: Improves soil drainage as they decompose
eggshell calcium benefits tomato plants comparison

Pro Tip: Egg shells decompose slowly, feeding plants for months!

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3 Ways to Prepare Eggshell Fertilizer

Unlock your eggshells full potential with these easy methods—each perfect for different gardening needs. Choose your favorite or rotate between all three for year-round soil enrichment!

Oven-Sterilized Powder (Most Effective): Bake at 300°F for 10 mins, then blend to dust. Perfect for seed starting mixes!
Vinegar Extract (Fast-Acting): Soak shells in vinegar for 2 weeks, dilute 1:10. Emergency fix for calcium-deficient plants.
Direct Soil Amendment (Easiest): Crush dry shells coarsely and till into garden beds. Slow-release calcium for 6+ months.

Eggshell Fertilizer FAQs

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