Plants that bloom in September in Zone 4 with green flowers

Big Bluestem

The signature grass of the tallgrass prairie, turning copper-bronze in fall with distinctive turkey-foot seed heads.

Blue Grama Grass

Short clumping grass with distinctive eyebrow-shaped seed heads thrives in dry soils.

Flowering Tobacco

Tubular flowers that release sweet fragrance at dusk. A cottage garden classic that attracts moths and hummingbirds.

Japanese Painted Fern

Silver and burgundy fronds unlike any other fern. Foliage plant that earns its keep on color alone.

Limelight Hydrangea

Cone-shaped blooms open chartreuse, mature to white, then blush pink in fall. Tough as nails.

Little Bluestem

Upright clumps turn coppery orange in fall and stand well through winter.

Little Lime Hydrangea

Compact Limelight. Same color show in a smaller package perfect for borders and containers.

Northern Sea Oats

Flat seed heads dangle from arching stems and dance in the slightest wind. The best native grass for shade.

Northwind Switchgrass

Stiffly upright blue-green foliage that never flops. The most architectural switchgrass available.

Ostrich Fern

Tall vase-shaped fronds that unfurl from fiddleheads in spring. Spreads to form dramatic colonies.

Prairie Dropseed

Fine-textured mounds send up airy fragrant flower sprays that persist into winter.

Sedum

Succulent leaves, tough as nails. Ages to deep crimson in autumn.

Sideoats Grama

Seed heads hang like tiny flags along one side of the stem on this graceful, drought-tolerant prairie native.