Cryptocoryne lutea

Quick facts

Max height

20 cm

Growth rate

slow

Difficulty

beginner

Placement

midground

Propagation

runners

Water parameters

Temperature

22–28°C

pH

6.0 to 8.0

Hardness

1 to 18 dGH

Light and nutrients

Lighting

low

CO2

not required, but boosts growth and color

Substrate

nutrient rich

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)

may get uprooted by active diggers

Root-disturbing fish

sensitive to root disturbance, plant where roots stay undisturbed

Habitat

Native to Sri Lanka, growing in shallow, slow-moving streams and river margins. The species (Cryptocoryne lutea, sometimes classified as C. walkeri var. lutea) is a small to medium Cryptocoryne with narrow, elongated leaves in shades of yellow-green to olive. The name 'lutea' means yellow, referring to the warm, golden-green coloring that distinguishes this species from the darker brown-green tones of C. wendtii or C. beckettii. Leaves are 10–15 cm long and 1–2 cm wide, with smooth to slightly wavy margins. The compact size and warm coloring make it useful for midground planting where it provides tonal contrast against darker green species. Found in the aquarium trade since the mid-20th century, it remains a popular and widely available Cryptocoryne, though it's sometimes mislabeled as C. walkeri or confused with juvenile C. beckettii by retailers.

Care notes

Easy care, similar to other common Sri Lankan Cryptocorynes. Thrives in low to moderate light with no CO2 injection. Tolerates pH 6.0-8.0 and soft to moderately hard water. Plant in substrate with root tabs or nutrient-rich soil; root feeding is the primary nutrient uptake pathway for all Cryptocorynes, so root-zone nutrition matters more than water column dosing. Growth is moderate once established, with roughly one new leaf every 1-2 weeks. The yellowish-green coloring provides a warm tone that stands out next to darker green plants (like Anubias or Java fern) and red-leaved species in a mixed planting. Under very low light, the yellow tones fade and leaves become uniformly olive-green; moderate light (30-50 PAR at substrate level) brings out the warmest color. Like all Cryptocorynes, susceptible to melt when first planted or when parameters shift. Propagation by runners; daughter plants form at the end of underground stolons over time. A group of 5-7 plants creates a cohesive midground planting within a few months. Temperature: 22–28°C. Hardy and forgiving once settled. Pairs well with darker Cryptocorynes like C. wendtii 'Brown' or C. beckettii for a natural, varied Cryptocoryne garden that mimics a Sri Lankan stream margin.

Further reading

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