Label food bag or container with name of oak species (if known).
1 large Plastic food bag
Place acorns sandwiched between sheets of moistened paper towels.
6 sheets Paper towel, 20 Acorns
With acorns covered, place everything in food bag or container in fridge. Do not seal bag or use a lid: you want some air circulation.
Set reminder in calendar or phone to check acorns every few days.
When acorn root or shoot is around two-inches long, plant in potting mix approximately one inch deep below surface with roots aiming down.
If mid-winter, grow oak sapling in sunny window, never allowing soil to dry out. Otherwise grow outdoors in part shade.
Oak can be transplanted to final location in garden when approximately a foot tall with several leaves and/or prior to becoming rootbound.
Acorns from white oaks germinate in fall.Acorns from red oaks first require a period of cold stratification before they can germinate. This fridge method mimics cold stratification using a household fridge.I use paper towel but you can use a washable tea or dish towel as well. Your fridge temperature should be 34° to 40°F / 1° to 4°C. Never allow acorns to freeze or dry out. See the entire article for tips on choosing viable acorns, identifying white versus red oaks, and more detailed planting instructions.