All taxes assessed, together with any percentage imposed for delinquency and the cost of collection, shall constitute liens on the property assessed; every tax upon personal property shall be a lien upon real property of the owner of such personal property. The liens provided for in this section shall attach as of the first Monday in March in each year, and may be enforced by actions in any court of competent juris-diction to foreclose such liens, or by a sale of the property affected and the execution and delivery of all necessary certificates and deeds therefor, under such regulations as may be prescribed by ordinance; provided, that when real estate is offered for sale for city taxes due thereon, or constituting a lien thereon, the same shall be struck off and sold to the city, in like case and in like manner and with like effect and with like right of redemption, as it may be struck off and sold to the state when offered for sale for state and county taxes; and the council shall have power to provide for the procedure to be followed in such sales to the city and redemption therefrom.