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米草© Krzysztof Ziarnek, Kenraiz / CC BY-SA 4.0

米草

Bacopa monnieri is a bright green aquatic stem plant known in Japanese as Otome-azena. Its small, thick, spoon-shaped leaves grow in opposite pairs along upright stems, making it useful for the mid to background of an aquascape. It tolerates a wide range of water conditions and thrives without added CO2, which makes it an easy, reliable choice for beginners setting up their first planted tank. Regularly trimming and replanting the cuttings lets you keep it looking full and healthy over the long term. Grown emersed under the right conditions, it produces delicate pale pink to white flowers, offering a different look from its fully submerged form.

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米草的基本資料

栽培難度
適合新手
壽命
多年生草本。可通過回剪維持長期生長
體型
小型水草,葉片長度0.8~2公分
適宜溫度
18〜28℃
澆水
CO2和肥料非必需
光量·照明
需要中等以上光照。光線過弱時,莖部下方會受損。
CO2·肥料
CO2注入非必需。若以CO2和強光培養,需確保硝酸鹽、磷酸鹽和鐵質充足。
水溫·水質
適溫為18~28℃。pH 5~9適應範圍寬廣,耐硬水。
底床·著床
在底床中以數株群植。適合中景至後景配置。
修剪·繁殖方法
可剪取側枝後重植,或分離根部萌發的新莖進行繁殖。
注意事項
日本沖繩縣已有野生化報告。水草不可隨意棄置戶外,不可使其從水槽或屋外花盆中逸出。
特徵莖生水草初心者友善易於維護中景水草

關於米草

Bacopa monnieri is a hardy aquatic plant with thick, rounded leaves that tolerates varied water conditions and grows well without added CO2, an easy, long-lasting choice for beginners.

開始照料米草前需要了解的7件事

  1. 1Light Placement

    Bacopa monnieri prefers bright light but grows fine under typical indoor aquarium lighting without direct sunlight. Stronger light tends to shorten the spacing between leaves, giving the plant a more compact, tidy shape.

  2. 2No CO2 Required

    One of its biggest draws is that it grows well without added CO2, making it a great fit for low-tech tanks. That said, adding CO2 will encourage even more vigorous growth.

  3. 3Substrate Flexibility

    It roots easily in either plain gravel or nutrient-rich aquasoil. Since it doesn't demand special fertilization to thrive, it pairs easily with a wide range of other plants in a layout.

  4. 4Trim and Replant

    Once a stem grows tall enough to reach the water surface, trim the top and replant the cutting in the substrate. This regular trim-and-replant routine keeps the plant from becoming leggy and helps it stay full and bushy.

  5. 5Opposite Leaf Pattern

    Its small, thick, wide-tipped leaves grow in opposite pairs along the stem. This regular, symmetrical arrangement gives the plant a neat, orderly look even underwater.

  6. 6Flowers When Emersed

    Portions of the stem that grow above the waterline develop into emersed leaves, and under the right conditions they produce delicate pale pink to white flowers. The emersed leaves differ slightly in shape and color from the submerged ones, adding visual variety.

  7. 7Choosing Healthy Stock

    Look for bright green leaves with short spacing between nodes, a sign of vigorous growth. Avoid stems with mushy or yellowing leaves near the base, as these indicate the plant is struggling.

米草的常見問題

Q.Can beginners grow this plant?
A.Yes, it's considered beginner-friendly because it tolerates a wide range of water conditions and grows well without added CO2. Basic aquarium lighting is enough to keep it healthy.
Q.Does it need CO2 injection?
A.No, CO2 injection isn't required, it's a classic low-tech plant that grows fine without it. Adding CO2 will simply speed up its growth.
Q.How often does it need trimming?
A.A good rule of thumb is to trim once the stems approach the water surface. Cutting the top and replanting it keeps the plant compact and prevents it from becoming leggy.
Q.Can it be grown emersed, out of water?
A.Yes, it adapts well to emersed conditions and develops emersed-form leaves. Under the right conditions, it will even produce pale pink to white flowers.
Q.Where does it work best in an aquascape layout?
A.Thanks to its small leaves and hardiness, it works well planted in groups in the mid to background of a tank to create a natural, bushy look. Because you can easily control its density through regular trim-and-replant, it's a flexible choice for shaping the layout.

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