A system comprising an air seeder assembly has a base mount with base ears including a first pair of base bores and defining a channel therebetween with a channel width. The assembly comprising a seed boot removably mountable on the base mount, and having a pair of boot ears with a first pair of boot bores. A seed boot stabilizer is mountable on the seed boot and the base mount and positionable in the channel between the seed boot and the base mount. The boot stabilizer has a primary portion with a first stabilizer bore alignable with the first pair of base bores in the base ears. A fastener structure may extending through the pair of base bores of the base ears, the pair of boot bores of the boot ears and the stabilizer bore to fasten the stabilizer to the seed boot and the base mount.