Care specifications
| Type | Carpet |
|---|---|
| Difficulty | Medium |
| Light | Medium (35–70 µmol PAR) |
| CO2 | Beneficial, not required |
| Fertilizer demand | Medium |
| Growth rate | Medium |
| Max height | 4 in |
| Spread | 4 in |
| Placement | Foreground |
| Attaches to hardscape | No |
| Snail & shrimp safe | Yes |
| Temperature | 60–80 °F |
| pH | 6–7.5 |
| Color | Green |
| Trimming | Regular |
| Styles | Iwagumi, Nature |
Get Dwarf Hairgrass
Propagation
Spreads by runners; separate a clump into small tufts and plant them in a grid to seed a lawn.
Frequently asked questions
How do I plant Dwarf Hairgrass so it actually spreads?
Split the pot into a dozen or more small tufts and plant them in a grid about an inch apart, pushing the roots in and keeping the crowns at substrate level. Small, well-spaced tufts send runners far faster than a few large clumps.
Should I trim Dwarf Hairgrass?
Yes — counterintuitively, cutting it down to about an inch shortly after planting redirects energy into runners instead of blade height, which is what fills the carpet in. After it covers, an occasional mow keeps the lawn dense and prevents the lower layer from browning.
Can I dry-start a Dwarf Hairgrass carpet?
Yes, and it is one of the most reliable routes to a dense lawn. Plant your tufts in damp — not flooded — substrate, seal the tank to hold humidity, and let the grass run emersed for several weeks with unlimited atmospheric CO2 before filling; the established carpet barely notices the flood. Use two to three inches of substrate so the runners have depth to travel.
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