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23 Common Additives for Tomato Planting Holes to Boost Growth and Flavor

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Compost: Rich in nutrients and microorganisms, compost improves soil structure and fertility.
Eggshells: Crushed eggshells add calcium to the soil, helping prevent blossom end rot.
Bone Meal: A great source of phosphorus, bone meal promotes strong root development and flower growth.
Epsom Salts: Provides magnesium, which is crucial for chlorophyll production and overall plant vigor.
Fish Heads: An old-time gardener’s trick, fish heads provide nitrogen, phosphorus, and calcium as they decompose.
Coffee Grounds: Adding coffee grounds can help to slightly acidify the soil, which tomatoes love.
Aspirin: Some gardeners swear by adding an aspirin tablet to reduce plant stress and boost the immune system.
Banana Peels: Rich in potassium, banana peels are excellent for promoting flower and fruit growth.
Kelp Meal: High in minerals and growth hormones, kelp meal is a powerful soil amendment.
Rock Dust: Adds trace minerals to the soil, improving plant health and flavor.
Worm Castings: An excellent source of nutrients, worm castings also improve soil structure and moisture retention.
Mycorrhizal Fungi: These beneficial fungi help extend the plant’s root system and improve nutrient uptake.
Garden Lime: If your soil is too acidic, garden lime can help balance the pH to suit tomatoes.
Wood Ash: Provides potassium and calcium, but use sparingly as it can also raise soil pH.
Potting Mix: Adding a bit of potting mix can help lighten dense soils, improving root growth.
Peat Moss: Helps retain moisture in the soil, which is beneficial for tomato plant hydration.
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