Ambulia

Quick facts

Max height

50 cm

Growth rate

fast

Difficulty

beginner

Placement

background

Propagation

stem cuttings

Water parameters

Temperature

20–28°C

pH

5.5 to 7.5

Hardness

2 to 20 dGH

Light and nutrients

Lighting

medium

CO2

not required, but boosts growth and color

Substrate

inert ok

Feeding

feeds from both water column and roots (liquid ferts plus root tabs)

Substrate

What this plant roots into (or attaches to). The substrate affects both plant nutrition and water chemistry; see each linked page for full effects.

This plant feeds primarily from the water column, so substrate choice matters more for its fish-tank compatibility than for plant nutrition.

With fish

Plant-eating fish

safe with plant-eating fish (tough leaves or unpalatable)

Diggers (corydoras, loaches)

fine - root system or attachment style handles it

Root-disturbing fish

tolerates fish that disturb roots

Habitat

Native to tropical and subtropical Asia, from India through Southeast Asia. Found in marshes, rice paddies, ditches, and slow-moving waterways. The species (Limnophila sessiliflora) is a feathery stem plant with whorls of finely divided, bright green leaves along each stem. The appearance is similar to Cabomba but Limnophila is significantly easier to grow, making it the recommended alternative for keepers who can't maintain Cabomba. The whorls of fine, feathery leaves create a soft, airy texture in the aquascape. Stems reach 30–50 cm and branch freely, forming dense, bushy backgrounds. The species has been in the aquarium trade for decades and remains widely available and affordable. The species has been introduced to parts of the southeastern US where escaped aquarium plants have established naturalized populations in warm waterways. Listed as a noxious weed in some US states, which restricts commercial sale.

Outdoor pond use

This species transitions to outdoor ponds well, not just indoor aquariums.

Outdoor pond zones (USDA)

8 to 13 (winter low around -12°C or warmer)

Below the minimum zone, the plant won't overwinter outdoors but can still be grown seasonally and overwintered indoors. Several pond-friendly species (water hyacinth, water lettuce, parrot's feather) are regulated as noxious in some jurisdictions; check the legality data on the profile before releasing anything to an outdoor body of water.

Care notes

An easy feathery stem plant that succeeds where Cabomba often fails. Grows in moderate to high light without CO2, though CO2 improves growth speed and fullness. The fine leaves are less prone to dieback and shedding than Cabomba under marginal conditions. Plant stems in groups of 5-8, pushed into the substrate. Growth is fast: 5–15 cm per week under good light, requiring weekly trimming. Trim tops and replant cuttings. The cut lower stems produce abundant side shoots, creating increasingly bushy growth over successive trim cycles. Under high light, the leaf whorls become tightly spaced and create a dense, feathery mass that looks spectacular as a background. Under low light, internodes lengthen and the plant becomes sparse. Nutrient requirements are moderate; liquid fertilizer supports healthy growth. Iron deficiency causes pale new growth. Temperature: 22–28°C. pH 6.0-7.5. Soft to moderately hard water. In the US, Limnophila sessiliflora may be classified as a noxious weed in some states; check local regulations. Where legal, it's one of the best easy background plants for creating a soft, natural look. A good alternative to Cabomba for keepers who want the feathery look without the difficulty. Also works well as a floating plant: stems grow horizontally at the surface with hanging roots, providing excellent fry cover.

Further reading

• How to cycle a fish tank
• Water chemistry for fishkeepers: pH, GH, KH, and what they mean