Plant comparison
Eichhornia Diversifolia vs Pogostemon Helferi (Downoi)
How the Eichhornia Diversifolia and Pogostemon Helferi (Downoi) compare on care, size, water and temperament, and which plant suits your tank.
By Mike ElmiraUpdated
TL;DR, Eichhornia Diversifolia vs Pogostemon Helferi (Downoi)
The Eichhornia Diversifolia and the Pogostemon Helferi (Downoi) come up together a lot when people are choosing a plant, and they are close enough to weigh side by side. Both are happy somewhere around 22 to 28 °C and pH 6 to 7, so a single tank can suit either one. The Pogostemon Helferi (Downoi) is the more forgiving of the two, which matters if this is an early tank, while the Eichhornia Diversifolia rewards a bit more attention. Read the full care notes on each below and pick the one whose look and pace fit the tank you're building.
Group compatibility overview
Excellent fit
Every key parameter overlaps and no major conflicts surfaced.
1 note
Temperature
- Eichhornia Diversifolia22–28 °C
- Pogostemon Helferi (Downoi)22–28 °C
pH
- Eichhornia Diversifolia5.5–7
- Pogostemon Helferi (Downoi)6–7.5
Hardness
- Eichhornia Diversifolia1–8 dGH
- Pogostemon Helferi (Downoi)2–15 dGH
What to plan for
- Demanding species presentEichhornia Diversifolia are difficulty 4+. Stable parameters and weekly maintenance are non-negotiable.
Full attributes
Every parameter, side by side| Parameter |  PlantEichhornia DiversifoliaEichhornia diversifolia |  PlantPogostemon Helferi (Downoi)Pogostemon helferi |
|---|---|---|
| Category | Plant | Plant |
| Origin | South America | Thailand, Myanmar |
| Family | Pontederiaceae | Lamiaceae |
| Temperature | 22–28 °C | 22–28 °C |
| pH | 5.5–7.0 | 6.0–7.5 |
| Hardness (dGH) | 1–8 | 2–15 |
| Flow rate | Low to Medium | Medium |
| Max height | 30–50 cm | 5–12 cm |
| Difficulty | 4 / 5 | 3 / 5 |
| Light | High | Medium to High |
| CO₂ | Required | Recommended |
| Growth rate | Medium | Medium |
Frequently asked questions
Direct answers to the questions search engines and AI assistants surface most often about this species.
Can you keep Eichhornia Diversifolia and Pogostemon Helferi (Downoi) together?
Yes. Their temperature and pH ranges overlap around 22 to 28 °C and pH 6 to 7, so one set of water conditions keeps both comfortable. Match group sizes and cover the usual planted-tank basics and they share a tank fine.
Which is easier to keep, the Eichhornia Diversifolia or the Pogostemon Helferi (Downoi)?
The Pogostemon Helferi (Downoi) is the easier of the two, closer to middle-of-the-road, while the Eichhornia Diversifolia leans demanding.
Do Eichhornia Diversifolia and Pogostemon Helferi (Downoi) need the same water?
Close to it. Aim for 22 to 28 °C and pH 6 to 7 and you're in the shared sweet spot for both. Full ranges are in the table above.
What's the main difference between the Eichhornia Diversifolia and the Pogostemon Helferi (Downoi)?
Placement and light. The Eichhornia Diversifolia works as background, the Pogostemon Helferi (Downoi) as foreground or midground, and their light needs differ, which is covered in the table.