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Mix 1 tsp in water to feed soil microbes and improve nutrient uptake.
Aquarium Water (freshwater only)
Use the old water to irrigate your plants—it’s rich in beneficial nutrients and fish waste.
Wood Ash
Provides potassium and calcium. Sprinkle lightly on soil (avoid overuse and wet areas).
Gelatin (unflavored)
Dissolve in water—provides nitrogen, promoting leafy growth.
Milk
Mix with water (1:2 ratio) for a calcium-rich fertilizer that also prevents fungal diseases.
Seaweed (Rinsed)
Chop and mix into soil, or soak in water to create a mineral-rich plant tonic.
Vegetable Cooking Water (unsalted)
Let it cool and use to water plants—it's full of nutrients leached from veggies.
Herbal Tea (e.g., chamomile, nettle)
Boil herbs, let cool, and water plants with it—stimulates growth and protects from pests.
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