Ala. Code § 11-67-146

When a weed lien is made against a lot or lots or parcel or parcels of land, a subsequent redemption thereof by a person authorized to redeem, or sale thereof by the state, shall not operate to discharge, or in any manner affect the weed lien of the municipality, but a redemptioner or purchaser at a sale by the state of any lot or lots, parcel or parcels of land upon which a weed lien has been made, whether prior to or subsequent to a sale to the state for the nonpayment of taxes, shall take the same subject to the weed lien.