Plant comparison
Amazon Sword vs Hornwort
How the Amazon Sword and Hornwort compare on care, size, water and temperament, and which plant suits your tank.
By Mike ElmiraUpdated
TL;DR, Amazon Sword vs Hornwort
The Amazon Sword and the Hornwort 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 6.5 to 7.5, so a single tank can suit either one. The Hornwort is the more forgiving of the two, which matters if this is an early tank, while the Amazon Sword 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.
Temperature
- Amazon Sword22–28 °C
- Hornwort15–28 °C
pH
- Amazon Sword6.5–7.5
- Hornwort6–8
Hardness
- Amazon Sword3–18 dGH
- Hornwort5–25 dGH
Full attributes
Every parameter, side by side| Parameter |  PlantAmazon SwordEchinodorus grisebachii |  PlantHornwortCeratophyllum demersum |
|---|---|---|
| Category | Plant | Plant |
| Origin | Brazil | Cosmopolitan |
| Family | Alismataceae | Ceratophyllaceae |
| Temperature | 22–28 °C | 15–28 °C |
| pH | 6.5–7.5 | 6.0–8.0 |
| Hardness (dGH) | 3–18 | 5–25 |
| Flow rate | Low to Medium | Low to Medium |
| Max height | 40–50 cm | 30–100 cm |
| Difficulty | 2 / 5 | 1 / 5 |
| Light | Low to Medium | Low to High |
| CO₂ | Optional | Not required |
| Growth rate | Medium to Fast | Very fast |
Frequently asked questions
Direct answers to the questions search engines and AI assistants surface most often about this species.
Can you keep Amazon Sword and Hornwort together?
Yes. Their temperature and pH ranges overlap around 22 to 28 °C and pH 6.5 to 7.5, 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 Amazon Sword or the Hornwort?
The Hornwort is the easier of the two, closer to very easy, while the Amazon Sword leans beginner-friendly.
Do Amazon Sword and Hornwort need the same water?
Close to it. Aim for 22 to 28 °C and pH 6.5 to 7.5 and you're in the shared sweet spot for both. Full ranges are in the table above.
What's the main difference between the Amazon Sword and the Hornwort?
Placement and light. The Amazon Sword works as background, the Hornwort as background or floating, and their light needs differ, which is covered in the table.