A little more green in the world ✳ 2,083 plants across 13 growing zones
worldthatgrows.
Grass · Easy

How to Grow Northern Sea Oats

Chasmanthium latifolium

Your complete guide to growing Northern Sea Oats.

☀SunPartial shade (4-6 hours)
💧WaterModerate — regular watering
🗺Zones5–9
📏Height2-5 feet
Northern Sea Oats📷 Wikimedia Commons

When to Plant Northern Sea Oats

Planting windows vary by USDA hardiness zone. Look up yours by ZIP code.

ZoneStart IndoorsDirect SowHarvest
Zone 5 — April – June —
Zone 6 — April – June —
Zone 7 — March – May —
Zone 8 — March – May —
Zone 9 — February – April —

Companion Plants for Northern Sea Oats

✓ Good companions

Astilbe

Thrives in similar moist, partially shaded conditions with complementary foliage

Black-eyed Susan

Shares similar growing conditions and creates attractive naturalized plantings

Coral Bells

Low-growing perennial that complements grass texture and shares shade tolerance

Little Bluestem

Compatible native grass that provides textural variety without competition

Purple Coneflower

Attracts beneficial insects and provides structural contrast with similar moisture needs

Sedums

Drought-tolerant succulents that provide season-long interest without competing for resources

Wild Bergamot

Attracts pollinators and beneficial insects while tolerating similar soil conditions

Wild Ginger

Excellent groundcover companion for shaded areas with similar moisture requirements

✗ Keep away from

Autumn Olive

Creates dense shade and root competition that suppresses native grass growth

Crown Vetch

Aggressive spreader that can outcompete and smother ornamental grasses

Tree of Heaven

Releases allelopathic compounds that inhibit growth of native grasses and plants

Notes from the garden

A greener inbox, occasionally.

Seasonal planting ideas, useful tips and a little inspiration. No weeds.