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Crotaleria sagittalis

Summer annual legume with yellow flowers that produce an inflated pod that rattles; doesn’t like tall competition



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Crotaleria sagittalis, commonly known as Rattlebox or Arrowhead Rattlebox, is a native annual legume.

Wildlife notes

long-tongued bees, including bumblebees, Carder bees, Cuckoo bees, and large Leaf-Cutting bees are the plant’s primary pollinators. Sometimes the flowers are visited by small butterflies or skippers, but they are less effective at cross-pollination. Bella Moth caterpillars feed on the foliage. In addition, there have been reports of Frosted Elfin caterpillars and the skipper caterpillars of Wild Indigo Duskywing feeding on the foliage.  Though the foliage is considered toxic to herbivorous mammals, White-Tailed Deer will occasionally chomp off the tops of individual plants.


Forage notes

Rattlebox is toxic to livestock, particularly horses, and it is generally avoided by them as a food source.

Landscaping notes

This plant prefers full or partial sun, mesic to dry conditions, and barren soil containing sand, gravel, or clay. This wildflower is intolerant of competition from taller ground vegetation.

Restoration notes

Habitats include sand prairies, gravel prairies, clay prairies, sandy and rocky savannas, upland savannas, rocky glades, openings and small meadows in upland woodlands, fallow fields, and areas along railroads. Rattlebox prefers dry open areas with a history of disturbance.

Additional information

Weight N/A

Packet, Ounce, Pound


Full Sun to Part Shade

Seeding Rate

12 bulk lbs/acre


Dry, Average



Bloom Month

Jul, Aug



Specialty Uses


# seeds/pkt


Packet coverage area

5 sq. ft

Life Cycle


What is PLS?

Pure Live Seed (PLS) is the portion of good viable seed per pound. It is a measure of the seed that is alive and able to sprout into plants. This product is sold by PLS ounce/pound. To provide one ounce/pound of viable seed, you will receive more than one ounce/pound of product. Read more about PLS here.