How Long Should Fermented Rice Water Be Used to Water Plants for Best Results
Kitchen rice water, after being fermented, is a favorite natural nutrient solution for many gardening enthusiasts. However, incorrect usage can lead to soil hardening, root burns, or even the growth of tiny black flies. Mastering the correct fermentation cycle and watering techniques is essential for plants to truly absorb nutrients without attracting pests.
Golden Fermentation Period for Rice Water
Seasonal Influence on Fermentation Speed
In summer, when the temperature is above 25°C, sealed rice water can be fermented in 5-7 days, with visible separation of the liquid and a faint sour wine aroma. In winter, it needs to be placed in a warm environment (such as near a heater) for continuous fermentation for 20-30 days, and it is recommended to open the lid weekly to release gas to prevent container expansion.
Criteria for Determining Fermentation Completion
Successfully fermented rice water turns from milky and turbid to transparent and light yellow, with a stable pH value between 5.5-6.5. Watering with incompletely fermented rice water can cause the soil surface to harden, which can be verified using pH test strips or by observing if the plant's leaf tips turn yellow.
Practical Techniques for Pest-Proof Watering
Natural Pest Control with Fruit Peel
Add 2 pieces of citrus peel (orange, grapefruit, or lemon) to every 500ml of rice water. The D-limonene component in the peel can inhibit the hatching of insect eggs. After fermentation is complete, filter out the residue, dilute with water 10 times, and slowly water along the edge of the pot.
Soil Pretreatment Plan
Cover the surface of the potting soil with a 1cm thick layer of pine bark or ceramic stones as an isolation layer. Combined with monthly application of the fermented liquid, this can reduce the growth of tiny black flies by more than 70%. For plants that have already been infested, use a 1:15 diluted solution mixed with cinnamon powder to pour on the roots.
Key Points for Acid-Loving Plant Care
Appropriate Variety List
Rhododendron, gardenia, jasmine, camellia, and米兰 are the most suitable acid-loving plants, while leafy plants like pothos and Monstera deliciosa should not be used more than twice a month. Succulents and orchids must not be used.
Nutrient Efficiency Formula
Adding 3-5 crushed维生素B12 tablets or mixing equal amounts of beer for a second fermentation can increase the amino acid content. When using ferrous sulfate, it should be spaced out by more than 10 days to avoid excessive iron.
Mastering the temporal and spatial variables of rice water fermentation, combined with scientific watering techniques, can not only avoid pest problems but also provide plants with continuous slow-release nutrients. It is recommended to establish a fermentation time record table, adjust the usage frequency according to the characteristics of different plants, and truly convert kitchen waste into a boost for plant care.