Myriophyllum Tetrandrum
Plant Profile
Myriophyllum Tetrandrum is a delicate aquatic stem plant that closely resembles its relative Parrot's Feather (Myriophyllum aquaticum), although this species is better adapted for long-term submerged aquarium growth. Featuring fine, needle-like leaves that radiate in soft, fir-like whorls, it displays a striking contrast between bright lime-green foliage and rich reddish-brown central stems. Unique among many fine-leafed stem plants, Myriophyllum Tetrandrum thrives exceptionally well in moderately hard water conditions. Growing quickly to heights of 4 to 12+ inches, it forms dense, cloud-like green bushes that serve as ideal background filler in nature aquariums and Dutch-style layouts.
*Form Notice: Photos display this plant in both its emersed (above-water) and submerged forms. Depending on nursery availability and seasonality, you may receive this plant in either form. Learn more about what to expect by reading our guide on Emersed vs. Submerged-Grown Aquatic Plants.
Key Features & Benefits
- Delicate needle-like green whorls contrasted by reddish-brown stems add soft visual texture and movement to background zones.
- Superior submerged adaptation compared to other watermilfoil varieties, performing exceptionally well even in harder water setups.
- Fast-growing stem habit acts as an effective natural nutrient sponge to help maintain clean water and prevent unwanted algae.
Care & Planting Instructions
- Remove lead weight (or pot) and remove cotton wrap (or foam) surrounding the roots, then strip lower foliage so bare stems anchor cleanly into soil without rotting. *Myriophyllum foliage is extraordinarily delicate, so handle stems with care during preparation.
- Use fine-tip pinsettes to push individual stems or small stem groups 1 to 2 inches into substrate, spacing them slightly apart so light reaches lower foliage and prevents leggy decay.
- Provide moderate-to-high lighting and clean water conditions; while adaptable, supplying pressurized CO2 and quality aquarium soil yields much denser, bushier growth and richer stem coloration. See our guide to growing colorful aquarium plants.
- Maintain stable water parameters and avoid sudden environmental shifts to prevent leaf melt or needle shedding.
- Trim main stem tops with sharp straight scissors once stems reach the desired height, and replant top trimmings or lateral shoots directly into substrate to propagate and expand coverage. Read our trimming & propagation guide for details.
Quick Facts
Listed information should be treated as general guidelines only. Team Buce Plant encourages you to do thorough research to ensure healthy growth!
| Attribute | Specification |
|---|---|
| Scientific Name | Myriophyllum tetrandrum |
| Common Name(s) | Myriophyllum Tetrandrum, Feathery Watermilfoil |
| Family | Haloragaceae |
| Plant Type / Taxonomy | Stem Plant |
| Care Difficulty | Moderate |
| Light Requirement | Moderate to High |
| CO2 Requirement | Optional / Recommended (Encourages dense needle whorls) |
| Placement / Usage | Midground / Background Bushing |
| Height / Size | 4–12”+ |
| Growth Rate | Fast |
| Water Parameters | pH 6.0–7.5 (Tolerates moderately hard water) |
| Propagation Method | Cuttings (Cut stem and replant tops) |
| Origin | Southern Asia & Australia |
Frequently Asked Questions
1. Why are the lower leaves turning yellow or falling off my stem plants?
Lower leaf loss (leggy stems) usually occurs when lighting cannot reach the bottom of the plant due to overcrowding or shading from larger plants. Spacing individual stems slightly apart during initial planting and maintaining adequate light penetration will keep lower foliage healthy.
2. Is Myriophyllum Tetrandrum suitable for hard water aquariums?
Yes, unlike many delicate soft-water Myriophyllum species, Myriophyllum Tetrandrum adapts very well to moderately hard water setups while maintaining its lush green needle structure and reddish stem contrast.
3. How do I transition Myriophyllum Tetrandrum from emersed to submerged growth?
When transitioning from emersed to submerged growth, plant bare stems securely into substrate under adequate lighting and keep water parameters stable. As new growth adapts, the plant will shed its stiffer emersed leaves and sprout soft, feathery underwater needles. Once new shoots take root, trim away old lower growth to encourage dense branching.