Cryptocoryne undulata

Crypt Undulata Growing & Care Guide

Crypt Undulata is a vertical, highly robust midground species native to Sri Lanka, famous for its gorgeous lanceolate leaves with wave-like rippled edges. Showing a stunning olive-brown to reddish-bronze color, this slow-growing rosette plant is exceptionally hardy under low-tech setups, adding unparalleled tropical texture to any aquascape.

Lighting Low to Moderate

Water Parameter Aquatic (pH 6.0-7.8)

Substrate Nutrient-rich substrate / gravel

Water Temp 20°C - 28°C

Toxicity Pet Friendly (Non-toxic)

Botanical macro photography of Crypt Undulata (Cryptocoryne undulata) - Plant AI care database

How to Identify Crypt Undulata

Crypt Undulata (Cryptocoryne undulata) has key botanical markers. Recognizing these features is crucial for successful aquascaping and thriving growth.

✔
Visual Shape & Growth: Upright, compact rosette of elongated, wavy-edged olive-brown to bronze-green leaves.
✔
Leaf Morphology: Lanceolate leaves with unique highly-waved margins, showing bronze, green, or deep brown hues based on lighting.
✔
Root & Anchoring Structure: Extremely strong, extensive root network that anchors deeply into sand or gravel.

💡 Plant AI Tip: Take a photo with Plant AI to identify aquatic weeds and diagnose fungal spot diseases in 1 second.

Complete Cultivation & Spawning Guide

Follow our detailed scientific water parameters and care guides to keep your Crypt Undulata thriving.

pH: 6.0 - 7.8, GH: 4 - 15 dGH. Exceptionally adaptable to both soft and hard water parameters alike.

Low. Grows perfectly well without pressurized CO2, though minor carbon supplementation speeds up its slow growth rate.

Low to moderate lighting. High lighting will scorch the leaves, causing translucent brown patches to appear.

Clip old or decaying leaves at the crown base. Propagates easily by dividing the root runner stolons.

A heavy root feeder. Requires nutrient-rich substrate. Insert root fertilizer tabs near the base every few months.

Plant in sand, gravel, or aquasoil. Ensure the green crown (base of leaves) is completely above the substrate.

Optimal temperature is 20°C to 28°C (68°F - 82°F). Sensitive to sudden cold water shocks during tank maintenance.

Enjoys moderate current. Steady water flow delivers essential water column nutrients to its opposite leafy rosettes.

Its tough texture and bitter taste make it highly resistant to plant-eating fish. Safe for community setups.

Slow growth makes it susceptible to hair algae. Keep water clean and employ Siamense Algae Eaters or Amano shrimps.

Best planted in the mid-ground. Space individual crowns 2 to 3 inches apart in the background.

Common Diseases & Treatment

Crypt Melt (Transitional)

Symptoms: Leaves rapidly turn dark, translucent, and turn mushy or dissolve completely.

Action: Caused by sudden water chemistry shocks (e.g. salinity shifts, liquid carbon overdose) or extreme lack of light. Keep water stable.

Crown Suffocation

Symptoms: Leaves rot at the base and float away.

Action: Caused by planting the crown too deeply in the gravel. Pull the plant upward until the green crown base is visible.

Frequently Asked Questions

Why is my Crypt Undulata melting?

Crypts are highly sensitive to sudden changes in water chemistry or temperature. Overdosing chemicals or moving it to a vastly different tank will cause a massive leaf drop.

Can it grow out of water?

Yes! In high-humidity environments like terrariums or paludariums, it grows happily emersed, often producing beautiful flowers.

Why are the leaves turning green?

It is normal under very low lighting. Under moderate light and comprehensive liquid iron/root tab feeding, the leaves will develop rich reddish-bronze colors.

How fast does it grow?

Under moderate light and nutrients, it is a moderate grower, typically producing one new leaf every 7 to 10 days.