What is an Acorn Granary?
Acorn Granaries are traditional Native American storage containers used to hold foods like dried berries, rice, squash, and tree nuts…. (In this case: acorns from the city-wide acorn harvest happening this fall.) …And keep them safe from animals and the environment over winter.
What is the purpose of an Acorn Granary?
To store food that people needed to survive during the coldest parts of winter, when no plants grow, and all of the animals are hibernating, or have migrated to warmed areas.
Why are Acorn Granaries important?
Acorns were one of the single most important food sources in California [Heizer 1957]. Over winter, the bounties of California’s many edible plants, and the abundance of wildlife normally acquired through hunting, trapping, or fishing, is replaced with a barren landscape.
This is why it’s so important to gather as much food as possible; and to protect it from water, wind, rain, and the animals–who also depend on caches to survive through the winter.
How widespread is the use of Acorn Granaries?
It cannot be overstated: Acorns were one of the single most important food sources in California [Heizer 1957]. Most families had an acorn granary [Gifford 1932; Fremont 1843]. Granaries were meant to hold acorns as they dried over winter, however, granaries would be kept and maintained for many years.
How many acorns does an Acorn Granary hold?
Some granaries would hold just enough acorns to support a family until the next harvest. Other granaries could hold “ten to twenty sacks of acorns” [Gifford 1932]. Although, there’s no specific weight or volume measurement for how much a “sack” is. Heizer (in 1957), noted that Patwin communities had granaries with a capacity of about 6 to 10 bushels of acorns.
Several studies included dimensions of varying types of granaries made by different California Native Tribes:
On average, the granaries were about 3-4 feet in diameter, up to 10 feet high, and at least 2 feet off the ground.
How many acorns were harvested during the Acorn Harvest?
The only limit to how many acorns could be harvested was dependent upon the method of collection, and how many people were involved in the harvest.
The Acorn Harvest happens once a year, when there is a nearly limitless supply of acorns adorning the more-than 87 million oak trees which are endemic to California. [Oaks 2040]
Competition for Acorns
Over 100 different kinds of animals eat acorns, including (but not limited to):
- Bear
- Chipmunk
- Crows
- Deer
- Ducks
- Foxes
- Jack Rabbit
- Jays
- Mallards
- Mice
- Oppossums
- Quail
- Raccoons
- Squirrel
- Turkeys
- Voles
- Wild Hogs
- Woodpeckers
Every single one of these animals would gladly take a pre-foraged “snack pack” [that’s what a bear would call it] in a season when no other food is available.
This is why it is necessary to create: (a) a sturdy food container that (b) hides the scent of food, and (c) deters animals from eating through the container into the actual food inside.
What are the different types of Acorn Granaries?
Below is a list granary types–but the names aren’t official. There are no standardized names for granaries because over 300 unique languages were spoken in California.
- Coil-type –
Acorns chill under a coil basket made from cordage. (Usually on a platform.) - Hanging basket –
Hung from sturdy tree-limbs, or from a frame made from lashed wood. - Tree platform –
Resting on platform build in the crook of a tree. - Free-standing –
Made with sturdy legs to resist wind, and other forces. - Rock-butt –
Granary resting on a rock. Sometimes stabilized by legs, or tied to frame/tree limb, or all of the above.
Construction Materials
Willow reeds & poles, and California Bay boughs, were gathered from the Indigenous Land Lab
- Willow reeds and poles
- Leaves and boughs from:
- California Bay Laurel (Umbellularia californica)
- Bay Laurel (Laurus nobilis)
- Natural twine
Bay Laurel boughs were gathered during the Acorn Granary Challenge Session #3, at the Alameda Point Collaborative Farm2Market, where our events were held.
Acorn Granary Construction
After learning about the history, usage, and types of Acorn Granaries, we began granary construction over four sessions in July 2024.
Rolling the frame onto the hoops.
Completed granary frame.
Loosely woven base of the granary. (Take note the base is larger than the frame.)
Granary frame stuffed with bay leaves, sitting on base base, on top of tree rounds (with willow shims, lol.)
Shoring up the granary, using willow poles to stabilize with tension & compression. (MIT undergraduate remix.)
Granary Status: Ready for Acorns
Special Thanks & Acknowledgments
A huge shoutout, and special thanks goes out to the APC Farm2Market, for hosting our event, and the acorn granary.
Another huge shoutout goes to the Land Partners, who are hosting the Indigenous Land Lab, another Acorn Granary, and have graciously allowed us to harvest all of the willow and California Bay we used (and will use) for Acorn Granary Construction.
Special thanks goes out to everyone who participated in the Acorn Granary Challenge: Sandra, Liz, The Li & Pan Families, Natalie, Skipper.
What’s next?
