When Do Deer Shed Their Antlers? The Antler Cycle

White-tailed bucks usually shed, or cast, their antlers from late winter into early spring. University of Missouri Extension says that in an average season some male white-tailed deer shed in late December and most have shed by early March, while the Pennsylvania Game Commission describes antler drop in Pennsylvania as occurring from December through March and Indiana DNR describes most Indiana bucks shedding from January through April. The exact date depends on hormones, day length, health, stress and local conditions.

This guide focuses on white-tailed deer. For a broader species overview, see our Whitetail Deer guide.

The short answer: late winter, with local variation

If you are planning time in the woods for shed hunting, late winter is the general window for white-tailed deer, but the calendar is not the same everywhere.

University of Missouri Extension describes the average pattern this way: some male white-tailed deer shed antlers in late December, and most have shed by early March. The Pennsylvania Game Commission gives a December through March range for Pennsylvania and notes that natural variation and general health contribute to timing. Indiana DNR gives a January through April range for most Indiana bucks.

Those agency ranges are useful because they show why a single national date does not work. A buck in one region, or even one individual buck in poor condition, may cast earlier than another buck that is still in better physical shape.

The annual antler cycle

Male white-tailed deer grow a new set of antlers each year, according to University of Missouri Extension. Antlers develop from the pedicle on the skull, grow during spring and summer, harden before fall, remain through the breeding period and are cast after the season.

A simple whitetail cycle looks like this:

Stage	General timing described by official or university sources	What is happening
Casting	Late December into March in Missouri Extension’s average description, December through March in Pennsylvania, January through April in Indiana	The old antlers detach from the pedicles
Pedicle healing and new growth	After casting	University of Missouri Extension says new growth starts immediately, though it may not be visible for weeks
Velvet growth	Late spring through summer, with the University of Georgia describing normal growth beginning around late March and early April	Growing antlers are living tissue with a rich blood supply and a velvet covering
Mineralization and hardening	August and September	University of Missouri Extension says antlers begin to mineralize by August, and the National Deer Association DeerReport 2024 says antlers mineralize in August and September in response to increasing testosterone
Velvet shedding	Late summer into early fall, with varied timing by state and province in the National Deer Association DeerReport 2024	University of Missouri Extension says velvet shedding in white-tailed deer is usually fast, taking less than 24 hours

The cycle repeats every year. After casting, Mississippi State University says the pedicle behaves like an open wound and develops a wound epithelium within two to three weeks.

Day length, hormones and testosterone

The antler cycle is strongly tied to photoperiod, which means day length. University of Missouri Extension says hormone regulation of antler growth is controlled by photoperiod, and the National Deer Association DeerReport 2024 says antler growth, mineralization and casting are largely controlled by hormones and photoperiod.

That day length signal changes through the year. The Pennsylvania Game Commission says antler growth begins while days are lengthening, between the spring equinox and summer solstice. The University of Georgia says shortening days after the summer solstice trigger hormone changes that help harden antlers.

Testosterone is part of that hardening phase. The National Deer Association DeerReport 2024 says antlers generally grow during spring and summer and mineralize in August and September in response to increasing testosterone levels.

Spring and summer: antlers grow in velvet

During late spring and summer, University of Missouri Extension says growing antlers are covered by velvet and have a rich blood supply. This is the rapid growth phase.

Mississippi State University describes peak antler growth rates as up to three quarters of an inch per week in yearlings and one and a half inches per week in adults. Those numbers help explain why antlers can look noticeably different over a short period during summer.

Velvet antlers are also vulnerable. University of Missouri Extension says injury to velvet antlers can affect antler shape. That is one reason hunters may see unusual points, bends or asymmetry on some bucks in the fall.

Antler growth is not controlled by only one thing. University of Missouri Extension says antler growth depends on nutrition, age and genetics. Those factors help explain why bucks in the same general area may carry very different antlers.

Late summer: hardening and velvet shedding

By August, University of Missouri Extension says antlers begin to mineralize and harden. The University of Georgia says antler growth is complete around late August and early September, and the National Deer Association DeerReport 2024 describes mineralization in August and September in response to increasing testosterone.

Once antlers are hard, velvet is shed. University of Missouri Extension says velvet shedding in white-tailed deer is usually fast and can take less than 24 hours. The National Deer Association DeerReport 2024 reports varied velvet shedding times across the country based on state and provincial agency responses, which is another reminder that local timing matters.

If you are watching trail camera photos or glassing fields during this period, the same buck may appear to change quickly from rounded velvet antlers to hard, polished antlers.

Late winter: casting the old antlers

After the breeding season, the connection between the antler and pedicle weakens. Mississippi State University says cells called osteoclasts demineralize the connection where the pedicle meets the antler after the breeding season.

The result is casting. The antler separates from the skull, the pedicle begins healing and the next cycle starts. University of Missouri Extension says that after antlers are shed, new growth starts immediately, although it may not be visible for weeks.

Shed antlers do not always stay on the ground for long. University of Missouri Extension says shed antlers are often eaten by rodents because they contain protein and calcium phosphate.

Why some bucks shed earlier or later

A useful shed hunting calendar is local, not universal. Several factors can shift timing.

Health matters. The Pennsylvania Game Commission says natural variation and general health contribute to antler drop timing. Maryland DNR says deer in the best physical condition lose antlers later in winter.

Stress and injury can also matter. Indiana DNR states that early shedding may occur when a buck is injured or severely stressed.

Age, nutrition and genetics matter for antler development. University of Missouri Extension says antler growth depends on nutrition, age and genetics. These factors do not make every buck shed on a fixed schedule, but they help explain why antler size and form differ between animals.

Region also matters. The National Deer Association DeerReport 2024 reports varied velvet shedding times across the country from state and provincial agency responses, and state wildlife agencies give different casting windows for Pennsylvania, Indiana and Missouri.

Antlers are not horns

The National Park Service distinguishes antlers from horns by noting that horns are not shed, while antlers are shed and regrown yearly. The National Park Service also says antlers are made entirely of bone.

That yearly regrowth is what makes antlers so interesting to hunters and wildlife watchers. The rack a buck carries in fall is the result of that year’s growth cycle, including photoperiod, hormones, nutrition, age, genetics, health and any velvet injury.

If you want to learn how hunters evaluate antler measurements after a harvest, see our How to Score a Deer guide.

Shed hunting ethics

Shed hunting is best treated as a low impact wildlife activity, especially in late winter.

The U.S. Fish and Wildlife Service recommends ethical shed collecting by giving wildlife space and staying on roads and paths where collection is allowed.

Oregon Department of Fish and Wildlife says late winter shed hunting, especially with dogs, can stress big game when animals are vulnerable. That guidance is practical even outside Oregon: avoid pushing animals, keep dogs controlled where they are present and allowed, and leave an area if deer or elk are moving away from you.

Always check the current wildlife agency and land manager guidance before collecting sheds. Confirm whether collection is allowed, whether seasonal closures apply and what access rules are in place for the exact property you plan to visit.