Plants diurnal

big bluestem

Andropogon gerardi

Towering up to eight feet tall, Big Bluestem is the 'King of the Prairie,' famous for its three-pronged seed heads that look just like a turkey's foot. This iconic native grass transforms from a lush blue-green in summer to a spectacular reddish-bronze as the weather cools.

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Quick Identification

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Size

Height: 1.5–2.4 m (5–8 ft); Spread: 0.6–0.9 m (2–3 ft)

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Colors

Blue-green foliage in summer; stems often purplish at nodes; transitions to deep bronze, reddish-copper, or lavender in autumn; yellow-to-purple seed heads.

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Key Features

Seed heads branched into three spikes resembling a turkey's foot
Tall, sturdy stalks that remain upright through winter
Distinctive blue-purple tint at the stem 'joints' or nodes
Deep root systems that can extend up to 10 feet underground

When You’ll See Them

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Activity pattern diurnal

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Peak hours 6 AM - 8 PM (Best for sunlight-dependent growth and visibility)

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Season August-October (When the iconic 'turkeyfoot' seed heads emerge)

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Diet As a primary producer, it creates energy via photosynthesis using sunlight, water, and carbon dioxide; its deep roots forage for nitrogen and minerals in the soil.

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Habitat Native tallgrass prairies, open meadows, savannas, roadsides, and increasingly used in native backyard restorations.

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Behavior

Big bluestem is the quintessential 'King of the Prairie,' a warm-season perennial grass that grows in dense clumps or sods. Unlike many garden grasses, it begins its primary growth in the late spring when soil temperatures rise, quickly shooting up to heights that can tower over a human. It is a highly resilient species, using its incredibly deep root system to survive droughts and stabilize soil against erosion.

As a foundational member of the tallgrass prairie ecosystem, big bluestem provides essential structural habitat for various wildlife. It serves as a nesting site for ground-nesting birds and a host plant for several species of skipper butterflies. In the wind, the tall stalks create a rhythmic swaying motion, and their acoustic rustling is a hallmark sound of the American plains. While it doesn't 'behave' in the animal sense, its seasonal transition from green to a rich wine-red is a dramatic visual performance.

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Camera Tips

To capture the majesty of big bluestem, camera placement is everything. Since this grass can reach heights of 8 feet, avoid mounting your camera on the ground looking up, as this often results in 'lens flare' from the sun or a view obscured by lower foliage. Instead, mount your camera on a fence post or a dedicated garden stake at about 4 to 5 feet high. Position it 8 to 12 feet away from the main clump to ensure the entire 'turkeyfoot' seed head is in the frame during the late summer bloom.

Because the grass sways significantly in the wind, traditional motion-trigger settings can lead to thousands of empty videos or 'false positives.' If your AI camera allows it, use 'Pet' or 'Wildlife' detection modes to ignore the movement of the grass itself while specifically triggering for the sparrows, finches, and goldfinches that frequently perch on the stalks to eat the seeds. If you are looking to capture the grass specifically, use a 'Time-Lapse' setting rather than a motion trigger, taking one photo every hour to document its incredible color transformation from August through November.

Backlighting is your best friend when photographing big bluestem. Position your camera facing north or south so the rising or setting sun hits the seed heads from the side or back (rim lighting). This makes the fine hairs on the seeds and the purple-red hues of the stems 'glow' on camera. In the winter, keep the camera active; the copper-colored stalks provide a stunning contrast against white snow and are a magnet for wintering birds looking for cover and remaining seeds.

Similar Species

Species that look similar or are commonly confused with big bluestem.

Little Bluestem

Much shorter (max 4 feet) with individual fluffy seed heads rather than the three-pronged turkeyfoot shape.

Indiangrass

Has a single, feathery, golden-brown seed plume rather than the branched 'turkeyfoot' spikes.

Switchgrass

Features a delicate, airy, and highly branched seed spray (panicle) that looks like a misty cloud.

Frequently Asked Questions

While the grass grows throughout the day, it is most visually 'active' during the golden hours of sunrise and sunset. This is when the seed heads are most likely to catch the light, and when native birds are most active foraging among the stalks.

You can attract this species by planting native seeds or 'plugs' in a spot with full sun and well-drained soil. It is very hardy and, once established, requires very little water or maintenance, making it perfect for a wild-look garden.

Big bluestem doesn't eat in the traditional sense; it is a plant that produces its own food through photosynthesis. However, it thrives in soils rich in organic matter and uses its deep root system to pull nutrients and moisture from deep underground.

While once restricted to wild prairies, big bluestem is becoming very common in suburban 'nativscaping' and rain gardens due to its height, autumn beauty, and ability to attract birds and butterflies.

The easiest way to tell them apart is height and the seed head. Big bluestem reaches 5-8 feet and has a three-pronged 'turkeyfoot' seed head, while little bluestem stays much shorter (2-4 feet) and has fluffy, white seed clusters along the stems.

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