background image
background image
  • Community Aquariums
  • Plants Dictionary
  • Articles
  • Install
  • Log In
Aqua Diary
  • Terms of Service
  • Cookies
  • Data Deletion
  • Help & Support
  • Website Map
Aqua Diary © 2026 All rights reserved.

Helanthium sp. "Longifolius"

Family: Alismataceae
Genus: Helanthium

Difficulty

Easy

Light

Medium to High

Usage

Midground
Nano Tank
Foreground
GROUP

Ideal Conditions

Temperature

10-30°C(opt: 23°C)

CO2

10-40mg/L

pH

5-7.5

Nutrients


Description

Helanthium sp. "Longifolius" is a medium-sized sword plant that forms runners. It has narrow, grass-like leaves that grow taller than some other Helanthium species but shorter than others. The submersed leaves are not always band-shaped, but narrow towards the base and form a stalk-like part. This distinguishes it from similar-looking plants like Helanthium sp. "Angustifolius". The emersed leaves are smaller and lanceolate in shape. The plant produces runners quickly, forming long internodes that can be reddish in color.

Helanthium sp. "Longifolius"

Growth Rate

Fast

Nitrate (NO3): 10-50mg/L
Phosphate (PO4): 0.1-3mg/L
Potassium (K): 5-30mg/L
Iron (Fe): 0.01-0.5mg/L

Will this plant grow in your aquarium?

Check compatibility based on your aquarium parameters

Requires account

Create account to check compatibility

Add your aquarium parameters and see if this plant will thrive

What you can check:

  • If your water parameters match plant requirements
  • What parameters need adjustment for healthy growth
  • Potential issues before adding the plant
Create account and manage your aquarium

Already have an account? Sign in