Contents
Description
Nassella is a genus of grasses that are native to North and South America. It is commonly known as needlegrass, owing to the long-pointed awns that extend from the seed head. The genus contains around 100 species, with the most common species being Nassella tenuissima, also known as Mexican feather grass. Nassella is a popular ornamental grass due to its attractive appearance and low maintenance requirements.
Taxonomic Information
| Domain | Eukaryota |
|---|---|
| Kingdom | Plantae |
| Phylum | Spermatophyta |
| Class | Liliopsida |
| Order | Poales |
| Family | Poaceae |
| Genus | Nassella |
Appearance
Nassella grasses vary in appearance depending on the species, but they generally have long, slender leaves and a seed head that is held above the foliage on a tall stem. The seed head consists of numerous spikelets, each containing several flowers. The awns, or bristles, that extend from the spikelets can be up to 6 inches long, giving the grass a feathery appearance. The color of Nassella grasses ranges from green to blue-green, and some species have reddish-brown seed heads.
Care Guide
Nassella grasses are relatively low maintenance and easy to care for. Here are some tips:
- Water: Water the grass deeply once a week during the growing season, and reduce watering in the winter when the grass is dormant.
- Fertilization: Fertilize in the spring with a balanced, slow-release fertilizer.
- Soil: Nassella grasses prefer well-draining soil, but they can tolerate a range of soil types.
- Sunlight: These grasses prefer full sun, but they can tolerate some shade.
- Hardiness Zones: Nassella grasses are hardy in USDA zones 6-10.
Common Pests & Diseases
Nassella grasses are relatively pest and disease-free, but they can be susceptible to some problems:
- Spider mites: These pests can cause yellowing and browning of the grass blades.
- Root rot: Overwatering or poorly draining soil can cause root rot, which can be fatal to the plant.
- Fungal diseases: Nassella grasses can be susceptible to fungal diseases such as rust and leaf spot.
Habitat
Nassella grasses are native to North and South America and are found in a variety of habitats, including grasslands, meadows, and savannas. Some species are adapted to dry, arid conditions, while others prefer moist, well-drained soil. Nassella tenuissima, for example, is native to Mexico and thrives in hot, dry conditions.
Question and Answer
Q: Is Nassella tenuissima an invasive species?
A: Nassella tenuissima has become invasive in some areas outside of its native range, particularly in California. It can displace native plant species and alter ecosystems.
Q: Can Nassella grasses be used for erosion control?
A: Yes, Nassella grasses are often used for erosion control due to their deep root systems and ability to stabilize soil.
Q: How tall do Nassella grasses typically grow?
A: Nassella grasses can range in height from 1-6 feet, depending on the species.
Q: Are Nassella grasses deer-resistant?
A: Some Nassella grasses, such as Mexican feather grass, are deer-resistant due to their sharp, needle-like leaves.
Related Plants
- Stipa
- Pennisetum
- Miscanthus
- Calamagrostis
References
- “Nassella.” Missouri Botanical Garden, www.missouribotanicalgarden.org/PlantFinder/PlantFinderProfileResults.aspx?taxonid=285871.
- “Mexican feather grass (Nassella tenuissima).” PlantRight, www.plantright.org/plant/nassella-tenuissima-mexican-feather-grass.
- “Ornamental Grasses.” Royal Horticultural Society, www.rhs.org.uk/plants/popular/ornamental-grasses/nassella.
