Can Dwarf Hairgrass and Vesuvius Sword Grow Together?

Dwarf Hairgrass and Vesuvius Sword share a workable water window around 20 to 28 °C, pH 6 to 7.5, and 2 to 12 dGH.

Dwarf Hairgrass is listed for freshwater to lightly brackish water, while Vesuvius Sword is listed for freshwater. Keep the tank in the shared part of those tolerances rather than pushing either plant to an edge.

Both prefer moderate flow, so circulation can be planned as one steady pattern.

Their light and CO2 needs are close enough for one routine: Dwarf Hairgrass does best with moderate light and recommended added CO2, while Vesuvius Sword does best with moderate light and optional added CO2.

They naturally settle into different parts of the scape, which gives you more room to use each species for what it does best instead of forcing direct competition.

Dwarf Hairgrass reaches about 7 cm tall by 15 cm wide, while Vesuvius Sword reaches about 25 cm tall by 10 cm wide. Use those mature sizes for the layout, not the small nursery portions you bring home.

Shade is not the main concern here, which makes the layout easier to keep balanced over time.

Both are typically rooted in substrate with nutrient-rich substrate preferred and feed mainly as root feeders. The method is simple, but it also means the same planting zone can feel crowded if they are placed too close together.

Mature size is not the main thing working against this pairing, so normal maintenance is usually enough to keep the scape readable.

Dwarf Hairgrass brings moderate growth, moderate maintenance, and intermediate difficulty. Vesuvius Sword brings fast growth, moderate maintenance, and intermediate difficulty. If one grows much faster, trim that plant before it starts making the other look like the problem.

The main watch-out is that growth pace and maintenance rhythm are uneven, so the stronger grower can dominate if pruning slips.

The strongest reasons to try the mix are that they share a workable temperature window around 20 to 28 °C; and that their flow preferences sit close enough to tune one layout around both plants.

Use this pairing when you want two plants that can share one routine without forcing a compromise at every step. It is strongest in tanks where mature spacing is planned before the plants fill in.

The simple success test is whether both plants still look healthy after the faster grower has been trimmed several times. If one keeps declining after routine care, the layout is probably asking too much of it.