Hydrocotyle tripartita 'Japan'
Hydrocotyle tripartita
easy careOverview
Hydrocotyle tripartita ‘Japan’ is a fast, versatile creeping plant with small, three-lobed, clover-like leaves on threadlike stems. Its great strength is flexibility: trimmed hard under strong light it forms a fresh, bright-green carpet, while left looser it makes a bushy midground mound or scrambles up hardscape. Unlike the truly demanding carpets, it is genuinely easy and grows even without CO2 — just fast enough to need routine trimming.
Planting & placement
Push the stems and their runners into a nutrient substrate across the foreground or midground, spacing portions out so the runners knit together. Our how to plant aquarium plants guide covers the technique, and how to grow a carpet in a planted tank helps if you want the low, flat look. It also drapes attractively over wood and rock. It sits well alongside Monte Carlo and Staurogyne repens in a mixed aquascape.
Light, CO2 & ferts
Give it medium to high light: the stronger the light, the lower and denser it stays, while dim light makes it stretch and climb. CO2 is not required but noticeably tightens the carpet and speeds growth. Being fast, it appreciates a full liquid water-column fertilizer — see our best aquarium plant fertilizer guide.
Propagation & problems
Propagation could not be simpler: snip a length of stem with a couple of nodes and replant it, or split off runners. Every trimming is a new plant, so it spreads quickly. The main “problem” is exactly that vigour — it invades neighbours and climbs if neglected, so treat regular trimming as part of the routine. Under weak light it also grows leggy and sparse. It tolerates a wide temperature and hardness range, and its dense growth offers useful cover for shrimp and fry. Because it grows from nodes rather than a single crown, even a shredded portion will regrow, so it is very hard to lose. Give it light, trim it often, and Hydrocotyle tripartita is one of the most rewarding, adaptable plants for a green foreground or midground.
Hydrocotyle tripartita 'Japan' — frequently asked questions
Can Hydrocotyle tripartita grow without CO2?
Yes. It is one of the easier creeping plants and grows without CO2 in medium light, unlike true high-tech carpets. CO2 and strong light make it far denser and lower; without them it grows looser and taller but still thrives.
How do I make Hydrocotyle carpet instead of climbing?
Give it strong light and trim it hard and often. It naturally wants to climb toward light, so frequent trimming plus high light keeps the small three-lobed leaves creeping flat across the substrate as a fresh green carpet.
Is Hydrocotyle tripartita invasive in the tank?
It grows fast and sends runners in every direction, so it can spread into neighbours if left alone. Regular trimming keeps it in bounds — treat it as a vigorous plant that needs routine maintenance rather than a slow one.
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