UNSAFE WOOD:
Cedar
Pine that hasn't been kiln dried
Apricot
Cherry
Peach
Prune
Plum
Nectarine
SAFE WOOD:
Apple
Arbutus
Ash
Aspen
Beech
Birch
Cholla (a form of cactus)
Cottonwood
Crabapple
Dogwood
Elm
Fir
Hawthorn
Larch
Magnolia
Manzanita
Mulberry
Pine (kiln dried)
Pear
Pecan
Poplar
Sequoia (Redwood)
Willow
Cedar
Pine that hasn't been kiln dried
Apricot
Cherry
Peach
Prune
Plum
Nectarine
SAFE WOOD:
Apple
Arbutus
Ash
Aspen
Beech
Birch
Cholla (a form of cactus)
Cottonwood
Crabapple
Dogwood
Elm
Fir
Hawthorn
Larch
Magnolia
Manzanita
Mulberry
Pine (kiln dried)
Pear
Pecan
Poplar
Sequoia (Redwood)
Willow