Cabomba (green)
Cabomba caroliniana
intermediate careOverview
Cabomba (Cabomba caroliniana), the classic green cabomba, is a fast background stem plant with beautiful fan-shaped, feathery whorls of fine leaves — one of the most delicate, elegant textures in the hobby. It grows quickly and makes a soft, full background hedge, but it has a reputation for being temperamental: it is light-hungry and dislikes instability, so it thrives in a bright, steady tank and sulks in a dim or fluctuating one. Get the conditions right and it is spectacular.
Planting & placement
Cabomba is a background stem plant. It usually arrives in bunches, sometimes weighted; remove any band, separate the stems, and plant each one individually into the substrate a couple of centimetres apart so water and light reach the delicate foliage. Crowding causes the inner stems to rot. It has fine, brittle stems, so handle gently and plant with tweezers — see how to plant aquarium plants. Group several stems for a full hedge behind lower midground plants; aquascaping for beginners covers layering stems by height.
Light, CO2 & ferts
Cabomba’s fussiness is mostly about light and stability. Give it medium to high light — under weak light it drops its lower leaves and goes bare-stemmed. CO2 is beneficial and makes it far more reliable, though a very bright tank can manage without. It is a fast, hungry grower: dose a complete water-column fertilizer regularly so it never runs short — our best fertilizer picks help keep the fine foliage intact.
Propagation & problems
Propagation is standard stem-plant practice: cut a healthy top and replant it, and it roots and grows on, while the cut stem branches. The notorious problem is melting — fine leaves dropping to leave bare stems — which comes down to insufficient light, shading, or instability rather than disease. Keep it bright, spaced out, well fed and undisturbed. Its delicate leaves also trap debris and catch algae in poor flow, so keep water moving — see how to get rid of aquarium algae. Given a bright, stable home, cabomba is a fast, gorgeous background plant.
Cabomba (green) — frequently asked questions
Why does my cabomba keep melting and dropping its leaves?
Cabomba is light-hungry and hates instability. Low light, shading from other plants, or a sudden parameter change makes it shed its fine leaves and go bare-stemmed. Give it strong light, steady conditions and good fertiliser and it stays full.
Does cabomba need CO2?
Not strictly, but it is much easier with it. Under strong light alone cabomba can do well, but CO2 makes it far more reliable, denser and less prone to melting. In a low-light, no-CO2 tank it often struggles.
Is cabomba a good beginner plant?
It is sold as beginner-friendly, but it is fussier than truly easy stems like Brazilian pennywort or hygrophila. It rewards good light and stability but sulks in dim, unstable tanks — call it an intermediate plant that looks stunning when happy.
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