Care Guide

Cryptocoryne undulata

Cryptocoryne Undulata

Beginner difficultyOut of Season

Care at a Glance

Lighting

Low

Growth Rate

Slow

Growth Form

Rosette

Placement

Mid-ground

True Aquatic

Yes

Available As

Potted

About This Plant

Cryptocoryne undulata is a very vigorous Cryptocoryne that will grow equally well as an aquarium plant or as a terrarium plant. There are two color forms of the aquarium plant Cryptocoryne undulata and we grow the red form which exhibits a reddish color in the submersed growth. Cryptocoryne undulata gets its name from the wavy leaf margins that enhance its splendor. Native to Sri Lanka, Cryptocoryne undulata is one of the easiest varieties to grow. A great plant for the beginner it will tolerate almost any condition from low to high light and does not need supplemental CO2. Cryptocoryne undulata will thrive under medium light and regular fertilizer applications.

About the Cryptocoryne Genus

Family — Aracea

Cryptocoryne ("Crypts") are rosette-forming Araceae from Southeast Asian streams and flooded forests. They are famous for "melting" — shedding submerged leaves and regrowing — when conditions change, then settling in as low-maintenance midground anchors that thrive in soft, acidic water with modest light.

Quick-Reference Details

Common name: Cryptocoryne undulata
Scientific name: Cryptocoryne Undulata
Family: Aracea
Native to: Sri Lanka
Difficulty: Beginner
Requirements: Undemanding. Ideal beginner's plant
Lighting: Low
Growth rate: Slow
Growth form: Rosette
Placement: Mid-ground
True aquatic: Yes
Available as: Potted

Difficulty — Beginner

Tolerates a wide range of conditions and forgives setup mistakes. Thrives even in low-light tanks.

CO2 & Fertilization

CO2 is not required. This plant performs well in low-tech tanks with only basic liquid fertilization.

Tank Size & Setup

Plan for at least 20 gallons. Rosette plants spread a foot or wider once established and need vertical room.

Aquascaping & Placement

Place in the midground between foreground carpets and tall background stems. The structure adds visual depth and shelters small fish and shrimp. Plant the root crown just at the substrate surface. Burying the crown causes the plant to push itself back up over a few days.

Tank-Mate Compatibility

Compatible with the full range of community-tank species — tetras, rasboras, livebearers, corydoras, and most other peaceful freshwater fish do not damage the foliage. Tough enough for cichlid tanks and goldfish setups where most other plants are uprooted or eaten — the leaves are too leathery for those fish to chew through.

Pro Tips for Growing Cryptocoryne undulata

1Expect "Crypt melt" when first added — leaves dissolve, then new submerged-form leaves regrow over 4-6 weeks.
2Plant once and leave alone — Crypts hate being disturbed and will melt again if uprooted.
3Use root tabs near the base; Crypts feed primarily from substrate, not the water column.

Common Care Issues

Pale or stretched leaves

If new growth comes in pale yellow or the stems stretch unusually long, the plant is reaching for more light. Either raise the fixture's intensity or add a richer fertilizer.

Algae on old leaves

Slow growers accumulate dust and spot algae on older leaves. Wipe affected leaves with your fingers during water changes, and consider adding a few Amano shrimp or Otocinclus as cleaners.

"Crypt melt" after transplant

Expect leaves to dissolve in the first 1-2 weeks after planting or any major parameter change. The rhizome and roots stay alive and push out new, submerged-form leaves within 4-6 weeks. Don't dig it up.