Ammania Gracilis

Ammannia gracilis

A color-changing stem plant that rewards high light with deep pinkish-red foliage

Ammannia Gracilis is one of the most visually dramatic stem plants available, prized for its ability to shift from green or yellow-green under standard lighting to a rich pinkish-red under high intensity. Its long, pointed leaves grow in opposite pairs along firm, upright stems — adding strong vertical structure to mid-to-background placements and excellent cover for fish and fry. Despite its striking appearance, care level is easy, though coaxing out the signature red coloration calls for higher light and ideally some CO2 support. When conditions are right, it draws the eye like few other plants in the tank.

AQUASCAPING TIP: Place Ammannia Gracilis directly behind or beside bright green stem plants — the contrast between red and green foliage is one of the most striking visual effects in planted tank design. High-intensity lighting (8–10 hr photoperiod) paired with CO2 and micronutrient supplementation produces the deepest red. If color begins fading toward green, increasing light intensity is the first adjustment to make.

AT A GLANCE

CARE GUIDE

CUSTOMER QUESTIONS ANSWERED

(Q) Will the color really change to red — or does it always stay green?

= Under standard or medium lighting, Ammannia Gracilis stays a clean green to yellow-green. Under high-intensity lighting — especially paired with CO2 and regular micronutrient dosing — the leaves gradually develop a striking pinkish-red hue that deepens over time. The color shift is cumulative, not immediate, so give it a few weeks after dialling in conditions. If you hit the right combination of light, CO2, and nutrition, the transformation is one of the most rewarding in the planted tank hobby.

(Q) What lighting setup does it actually need for the red coloration?

= Medium light keeps the plant healthy and growing in its yellow-green form, but high intensity is what triggers red. Aim for a quality planted tank LED on an 8–10 hour photoperiod, positioned so the stems receive full coverage — not just the tops. Pair this with CO2 injection and weekly fertilization and you'll see progressively richer color as new leaves emerge. If colors begin fading back toward green, increasing light intensity is the first thing to try before adjusting anything else.

(Q) How do I stop it getting too tall and taking over the background?

= Regular trimming is the main maintenance task. When stems reach your preferred height, cut the top portion and replant the cutting alongside the parent stem. The original stem branches from the cut point, gradually creating a bushier, fuller look. This trim-and-replant cycle is exactly what produces the dense, layered red background effect you see in professional aquascapes — so what feels like maintenance is also the technique that makes this plant look its best.

WHAT'S INCLUDED

A bundle of Ammannia Gracilis stems, each 6+ inches long, ready to plant upon arrival. Rinse thoroughly before introducing to your tank.

Ships within 10–15 business days.