Bougainvillea, also known as paper flowers, are beloved for their rustic beauty, vibrant colors, and resilient life. To ensure a continuous bloom and brilliant display of flowers, gardeners need to know the proper care techniques. One crucial aspect is providing the right type of water to promote strong growth, healthy roots, and abundant flowers. Below are two of the plant’s favorite drinks; just a spoonful will lead to a stunning display.

Two Drinks Bougainvillea Loves: A Spoonful for Stronger Roots and Burst of Blooms
1. Fermented Rice Water – The Secret to Healthy Roots and Abundant Flowers
Fermented rice water is an excellent nutrient source for bougainvillea. When rice water is naturally fermented, essential nutrients such as vitamin B, protein, and beneficial microorganisms increase, promoting stronger root development.
- Preparation: After rinsing the rice, retain the first batch of rice water and store it in a sealed container for 24-48 hours to allow natural fermentation.
- Usage: Dilute one spoonful of the fermented rice water with one liter of clean water, then evenly water the base of the bougainvillea plant. For best results, apply this treatment once a week.
Effectiveness: Fermented rice water strengthens the roots, enhancing nutrient absorption and encouraging a vibrant bloom of flowers.
2. Soybean Water – Stimulating Continuous Blooming
Start by preparing a small amount of dry soybeans, soaking them overnight. Once the soybeans have absorbed the water and expanded, cook them in a pot. Allow the soybean water to cool, then bottle it for two weeks to ferment.
Fermented soybean water can be used directly, but to prevent any potential negative impact on the roots, it is advisable to dilute it before watering. Generally, a ratio of one part soybean water to five parts clean water is ideal, ensuring sufficient nutrient absorption without over-fertilizing.
Soybean water has distinct advantages over chemical fertilizers. Firstly, it is an organic, natural fertilizer free from chemical additives and environmentally friendly. Secondly, it does not negatively affect the growth of bougainvillea.
Additionally, soybean water is rich in nitrogen, essential for plant growth, and contains a good amount of phosphorus and potassium. These two elements play a crucial role in root development and flower bud differentiation in bougainvillea.

Fermented Soybeans Ready for Bougainvillea Care
When using soybean water, you can water it directly around the base of the plant to ensure deep penetration of nutrients into the soil and reach the root system. Applying soybean water once a month will result in a profusion of flowers, with buds covering the branches.
However, there are a few considerations to keep in mind. Firstly, ensure complete fermentation of soybean water before use, as unfermented portions may harm the root system. Secondly, use a moderate amount of soybean water to avoid over-fertilization and potential root damage.
Soybean water has a limited shelf life, so it is best to use it immediately after mixing to maintain effectiveness.
Notes on Using These Two Special Drinks for Bougainvillea Care
- Avoid overwatering with fermented water or soybean water to prevent waterlogging and root rot.
- Water in the early morning or cool evening for optimal absorption.
- Combine pruning and regular organic fertilizer application for comprehensive bougainvillea growth.
By following these care tips and treating your bougainvillea to these special drinks, you’ll be rewarded with bursts of vibrant blooms throughout the year, adding a touch of beauty to your living space.
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