Albert Barnes Commentary Joshua 2:6

"But she had brought them up to the roof, and hid them with the stalks of flax, which she had laid in order upon the roof." — Joshua 2:6 (ASV)

Stalks of flax - literally, “the carded fibres of the tree.” The flax in Palestine grew to more than three feet in height, with a stalk as thick as a cane. It was probably with the flax stalks, recently cut (compare Exodus 9:31, note) and laid out on the house roof to dry, that Rahab hid the spies.