Cryptocoryne wendtii 'Red' (syn. C. undulata) is one of the most popular and reliably beautiful Crypts in the freshwater hobby — a mid-sized rosette plant that produces broad, deeply textured leaves in warm shades of red, bronze, and brown that deepen in color as the plant matures and settles into the tank. The 'Undulata' designation refers to the distinctively wavy, hammered surface of the leaves — a texture that catches light at varying angles and gives the plant a richness that flat-leafed plants simply cannot replicate. It grows in low to medium light without CO₂, feeds primarily through its roots, and is one of the most forgiving aquatic plants a keeper can choose — slow to establish, but once rooted, exceptionally durable and long-lived. A natural fit for shrimp tanks, low-tech planted setups, and any aquascape that benefits from warm, earthy midground color.
Not Required
CO₂
72–82°F
Temperature
Low–Med
Lighting
What to Expect
Growth & Behavior Over Time
Warm red-brown leaves with a deeply undulating surface — mature leaves are broad, lance-shaped, and distinctively wavy — the hammered, textured surface is one of the defining visual features of the Undulata form and becomes more pronounced as leaves develop fully. Coloration ranges from olive-bronze in lower light to deep red-brown under stronger medium lighting and with iron supplementation.
Crypt melt is common after introduction and is temporary — Cryptocoryne frequently shed most or all of their leaves when moved to a new tank as they adjust to different water parameters and lighting. This is normal and not a sign of plant death. The rhizome and root system remain viable beneath the substrate and new growth emerges within two to four weeks as the plant acclimates.
Slow to establish, then highly durable — C. wendtii grows deliberately in the first weeks after planting, investing energy in root development before pushing significant leaf growth. Once the root system is established the plant becomes one of the most resilient in the hobby, tolerating fluctuating parameters and low light far better than most alternatives.
Color deepens with light and iron — the red and bronze tones are most intense under medium lighting with regular iron dosing. Low light produces greener, more olive growth; stronger light combined with a balanced liquid fertilizer with iron brings out the deepest, richest red-brown coloration the plant is capable of.
Propagates via runners — established plants spread gradually by producing horizontal runners with daughter plants at intervals. Runners can be left in place to form a natural colony or separated once the plantlet has developed four or more leaves and a visible root system.
Broad textured leaves accumulate biofilm — the wavy, textured leaf surface provides more biofilm surface area than smooth-leafed plants, giving shrimp, Caridina, and snails rich foraging opportunities across every leaf surface.
How to Set It Up
Getting Started
1
Plant in nutrient-rich substrate or use root tabs — C. wendtii is a root feeder that draws the majority of its nutrients from the substrate. A fertile substrate or root tabs placed within a few inches of the rhizome give the plant immediate access to the nutrition it needs to establish quickly and push strong, well-colored growth.
2
Bury the roots but keep the rhizome exposed — plant with enough depth to anchor the roots firmly, but ensure the rhizome — the horizontal stem connecting roots and leaves — remains at or just above the substrate surface. Burying the rhizome causes rot that spreads through the plant. This is the most common planting mistake with Crypts.
3
Don't move it once planted — Cryptocoryne are particularly sensitive to being uprooted and repositioned, which almost always triggers a full melt. Choose a final position before planting and leave the plant undisturbed. If relocation is necessary, do it gently and accept that a melt period will follow.
4
Dose iron regularly for best color — a liquid fertilizer containing iron, dosed consistently alongside a balanced macro and micro routine, is the most impactful thing you can do for color depth after lighting. The difference between an iron-dosed and unfertilized C. wendtii Red is visible within a few growth cycles.
💡 Bonus Tip
Don't remove the melting leaves too aggressively — trimming dead leaves cleanly at the base is fine, but leave the rhizome and any partially green leaves in place. The plant is still alive and actively rerooting beneath the substrate during melt, and disturbing it at this stage resets the recovery clock. Patience during the melt period is the single most important factor in successfully establishing Cryptocoryne.
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Browse more aquatic plants
Pair Cryptocoryne wendtii Red with mosses, Anubias, or fine stem plants for a complete low-tech planted layout. Browse our Aquatic Plants collection.
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