North America Native Plant

Composite Dropseed

Botanical name: Sporobolus compositus var. compositus

USDA symbol: SPCOC2

Life cycle: perennial

Habit: grass

Native status: Native to Canada âš˜ Native to the lower 48 states  

Synonyms: Sporobolus asper (P. Beauv.) Kunth (SPAS)  âš˜  Sporobolus asper (P. Beauv.) Kunth var. hookeri (Trin.) Vasey (SPASH)   

Composite Dropseed: A Hardy Native Grass for Low-Maintenance Landscapes If you’re looking for a resilient native grass that can handle tough conditions while adding subtle beauty to your landscape, composite dropseed might be just what you need. This unassuming perennial grass has been quietly thriving across North America for centuries, ...

Rare plant alert!

Region: New Jersey

Status: Highlands Listed, S2: New Jersey Highlands region ⚘ Imperiled: Extremely rare due to factor(s) making it especially vulnerable to extinction. Typically 6 to 20 occurrences or few remaining individuals (1,000 to 3,000) ⚘

Composite Dropseed: A Hardy Native Grass for Low-Maintenance Landscapes

If you’re looking for a resilient native grass that can handle tough conditions while adding subtle beauty to your landscape, composite dropseed might be just what you need. This unassuming perennial grass has been quietly thriving across North America for centuries, and it’s ready to bring its low-maintenance charm to your garden.

Meet Composite Dropseed

Composite dropseed (Sporobolus compositus var. compositus) is a native perennial grass that forms attractive clumps up to 3 feet tall. Don’t let its modest appearance fool you—this hardy grass is a champion of survival, capable of thriving in conditions that would challenge many other plants. Its fine-textured foliage creates a delicate, airy appearance that adds movement and texture to any landscape.

Where It Calls Home

This remarkable grass has one of the most impressive native ranges you’ll find, spanning from coast to coast across North America. You can find composite dropseed growing naturally in states from Alabama to Wyoming, and from British Columbia down to Texas. It’s truly a continental native, adapted to a wide variety of climates and conditions.

A Note About Rarity

While composite dropseed is widespread across most of its range, it’s worth noting that in New Jersey, this grass has a rarity status of S2, meaning it’s considered rare within that state. If you’re gardening in New Jersey and want to include this species, make sure to source your plants or seeds from reputable native plant suppliers who use responsibly collected material.

Why Choose Composite Dropseed?

There are plenty of reasons to fall in love with this understated grass:

  • Drought champion: Once established, it has high drought tolerance and uses very little water
  • Low maintenance: Requires minimal fertilizer and care
  • Long-lived: This perennial will be with you for the long haul
  • Fire tolerant: Great for areas prone to wildfires
  • Erosion control: Its root system helps stabilize soil
  • Wildlife habitat: Provides structure and shelter for small creatures

Perfect Garden Roles

Composite dropseed shines in several landscape situations:

  • Prairie gardens: A natural choice for native plant enthusiasts
  • Xeriscapes: Perfect for water-wise landscaping
  • Naturalized areas: Great for low-maintenance, wild-looking spaces
  • Erosion-prone slopes: Helps hold soil in place
  • Accent plantings: Adds texture and movement as a specimen plant

Growing Conditions That Make It Happy

Composite dropseed is refreshingly easy to please:

  • Sunlight: Full sun (shade intolerant)
  • Soil: Well-draining, coarse to medium textured soils
  • pH: Slightly acidic to neutral (5.5-7.0)
  • Water: Low water needs once established
  • Hardiness: Zones 3-9 (tolerates temperatures down to -38°F)
  • Rainfall: Thrives with 16-50 inches annually

Planting and Care Tips

Getting composite dropseed established is straightforward:

Starting from seed: This grass is typically grown from seed rather than transplants. Sow seeds in spring after the last frost, or in fall for natural stratification. With about 759,000 seeds per pound, a little goes a long way!

Site preparation: Choose a sunny location with good drainage. This grass doesn’t need rich soil—in fact, it prefers lean conditions with low fertility requirements.

Ongoing care: Once established, composite dropseed is remarkably low-maintenance. It grows at a moderate rate and doesn’t require regular fertilizing. Cut it back in late winter or early spring before new growth begins.

Patience pays off: Like many native grasses, composite dropseed may start slowly but builds strength over time. The regrowth rate after cutting is slow, so be patient with this steady performer.

Seasonal Interest

While composite dropseed isn’t the showiest plant in the garden, it offers subtle seasonal appeal. Its active growing period spans spring and summer, when you’ll see the fine green foliage at its best. Small yellow flowers appear in summer, though they’re not particularly conspicuous. The brown seed heads that follow add winter interest and provide food for birds.

The Bottom Line

Composite dropseed is the definition of a reliable garden partner. It won’t demand constant attention or fuss over soil conditions, but it will steadily provide texture, habitat, and erosion control year after year. For gardeners interested in native plants, water-wise landscaping, or simply adding some authentic North American character to their landscape, this humble grass deserves serious consideration. Just remember to source it responsibly, especially if you’re gardening in areas where it’s less common.

Composite Dropseed

Classification

Group

Monocot

Kingdom

Plantae - Plants

Subkingdom

Tracheobionta - Vascular plants

Superdivision

Spermatophyta - Seed plants

Division

Magnoliophyta - Flowering plants

Subdivision
Class

Liliopsida - Monocotyledons

Subclass

Commelinidae

Order

Cyperales

Family

Poaceae Barnhart - Grass family

Genus

Sporobolus R. Br. - dropseed

Species

Sporobolus compositus (Poir.) Merr. - composite dropseed

Plant data source: USDA, NRCS 2025. The PLANTS Database. https://plants.usda.gov,. 2/25/2025. National Plant Data Team, Greensboro, NC USA