Although fertilizers and sprays are the most common ways of feeding a plant, some gardeners who like exploring alternative ways of growing plants will find that soda water can give the plants the nutrients they are lacking. However, be aware of the consequences that come along with adding soda water.
Carbonated water can provide a plant with macronutrients, which are necessary for the continued growth of a plant. These nutrients--potassium, phosphorous, sodium, hydrogen and oxygen--are all essential ingredients, absorbed by the roots of the plant, that will speed the plant's overall growth.
Carbonated water will only work for plants that can grow moderately well in alkaline soil. Plants that are adapted to acidity will find the raise in pH levels considerably dangerous as their roots become unable to absorb nutrients and water. Alternating between flat water and carbonated can help to reduce the negative effects.
Gardeners who water their plants with soda water will find that these plants grow faster over a 10-day period than plants watered in a typical manner. This speedy growth, along with having healthier looking leaves and stalks, is due to the various nutrients that soda water provides.
The biggest drawback to growing a plant with carbonated water is the unsustainable raise in nutrients. Unlike fertilizer, the nutrients found in soda water are absorbed very quickly and are not retained by the soil. This means the plant will require more exposure as it begins to grow. The more carbonated water added to the soil, the higher the pH levels will become, stripping the calcium and making the soil unsuitable for plant life.
As plants lose their ability to absorb nutrients due to the change in pH levels, they become weaker. They may be discolored and their growth rate will suddenly decline. This makes plants more susceptible to insect or fungal threats. Plants with a nutrient deficiency will be less able to fight off such infestations or infections and, consequently, may die.