© Hannob / CC0Cryptocoryne × willisii
Cryptocoryne × willisii is a small Cryptocoryne believed to come from a natural hybrid group in Sri Lanka. Its slender, unmarked medium-green leaves fan out in a neat rosette, and while it resembles the smaller Cryptocoryne parva, willisii grows a bit larger and is notably sturdy and easy to keep. Plants typically reach 7 to 20 cm in height with a rosette spanning 7 to 15 cm, making it a great fit for the foreground to midground of a tank. It spreads readily via runners, sending out new plantlets that knit together into a low, grassy carpet over time. As a beginner-friendly perennial, it's a dependable staple you can build an aquascape around for years to come.
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Apply as a growerCryptocoryne × willisii key facts
- Growing Difficulty
- Beginner-friendly
- Lifespan
- Perennial; keeps spreading by runners
- Size
- 7–20 cm tall; rosettes 7–15 cm wide
- Temperature
- 22〜28℃
- Watering
- Grows without CO2
- Lighting
- Grows in low light.
- CO2 & Fertilizer
- CO2 is not required; as undemanding as C. wendtii or C. beckettii.
- Water Temperature & Quality
- Optimum 22–28°C; adapts to pH 4.5–8.
- Substrate & Attachment
- Plant in the fore- or midground; in tall tanks it can form a lawn-like ground cover.
- Trimming & Propagation
- Propagate from runners and basal offsets. In dense, tall stands the upright rhizomes can be cut back hard.
- Cautions
- Expect little change for about a month after planting. Sudden changes in light or water, or replanting, can trigger 'crypt melt'. If the rhizome survives, new leaves will follow, so leave it in place. Never release plants into the wild.
About Cryptocoryne × willisii
A small Sri Lankan Cryptocoryne with slender medium-green leaves that spreads readily via runners, forming a low, easy-care carpet for the foreground to midground of a beginner-friendly planted tank.
7 things to know before growing Cryptocoryne × willisii
1Foreground to midground
With a modest footprint—7 to 20 cm tall and a 7 to 15 cm rosette—willisii works well planted in the foreground to midground of the tank. Leave some space between crowns so the runners can spread naturally into a balanced group.
2Low light is fine
One of its strengths is that it doesn't need strong lighting to thrive, growing steadily under low to moderate light. Overly intense light tends to invite algae, so it helps to balance it against your other plants.
3Nutrient-rich substrate
Since it draws much of its nutrition through the roots, a nutrient-rich substrate such as aqua soil helps keep growth steady. When planting, bury the roots firmly so the crown doesn't work its way back up.
4Avoid sudden water changes
Like other Cryptocoryne species, willisii can suffer "crypt melt," where leaves dissolve after a sudden shift in water conditions. Keeping water changes gradual and the environment stable is key to growing it successfully over time.
5Replant with care
Leaves may temporarily die back right after replanting, but a healthy root system will let the perennial bounce back and fill in again. When separating plantlets produced by runners, wait until they've grown their own roots for a smoother transition.
6Seasonal care
As a perennial, it can be enjoyed year-round, though growth and propagation tend to be steadiest when water temperature and lighting stay consistent. Avoiding sharp temperature swings and maintaining your filter and lighting routine helps keep it thriving.
7Picking a healthy plant
Look for a plant with fully unfurled, medium-green leaves and no blackened or melted patches. A firm crown at the center of the rosette and pale, healthy-looking roots are good signs that it will establish well after planting.
Frequently asked questions about Cryptocoryne × willisii
- Q.Is this a good plant for beginners?
- A.Yes — it's a sturdy species generally considered beginner-friendly. As long as you avoid sudden changes in lighting or water conditions, it doesn't require special equipment to grow well.
- Q.How large does it get?
- A.It typically reaches about 7 to 20 cm in height, with a rosette spanning roughly 7 to 15 cm. That makes it a comfortable fit for the foreground to midground of a tank.
- Q.How does it propagate?
- A.It mainly spreads by sending out runners that produce new plantlets, gradually filling in as a carpet. As a perennial, it will keep multiplying as long as conditions stay favorable.
- Q.How is it different from Cryptocoryne parva?
- A.The two look and behave similarly, but willisii grows somewhat larger and is known for being especially sturdy. Both share the same slender, unmarked leaves.
- Q.Is it okay if leaves die back after replanting?
- A.Cryptocoryne species can temporarily lose leaves to environmental changes, sometimes called "crypt melt." As long as the roots stay healthy, the plant will send out new leaves again as a perennial — just avoid further sudden changes in water conditions or lighting while it recovers.
Handy Growing Tools for Cryptocoryne × willisii
Learn more about Cryptocoryne × willisii in the encyclopedia
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