Here are the key factors that affect which liquid works best for watering plants:
- Water content - Plants need water to carry out photosynthesis and grow. Water is the best option as it provides the necessary hydration without additional substances.
- Nutrient content - While some liquids like milk provide extra nutrients, too many can burn or damage plants. Water has the right balance of containing no extra nutrients to harm plants.
- Acidity - Highly acidic liquids like vinegar can lower the soil's pH and damage roots. Water is neutral.
- Sugar/calorie content - Drinks with added sugar lack the nutrients of water and can feed mold or attract pests if spilled on soil.
- Chemicals