Ludwigia Arcuata

Ludwigia arcuata is a species from the swamps of the southeastern United States that looks very different from other ludwigias: its leaves are not broad and oval but 2–3 cm long, narrow and needle-like. In strong light and with balanced nutrients the leaves take on orange, copper and red tones. It survives in medium light, but stays green-brown and the stems become sparse. Its hybrid with L. repens is also common in the trade.

• Stems are planted in groups of 3–5, 2–3 cm apart and 3 cm deep.
• It is used in the midground for textural contrast in front of broad-leaved green plants.
• A nutrient-rich, slightly acidic substrate supports the color.

• Light: High; necessary for color and dense growth.
• CO₂: Not required, but beneficial; it grows noticeably better in an aquarium with CO₂.
• Fertilizer: Iron and micronutrient supplementation; with nutrient deficiency the tips fade.
• Trimming: Cut from the top; side shoots grow and the cluster becomes bushier. Aging lower parts are renewed with fresh tops.