@connynasch Not all tulips are perennial but many are, especially if they are growing in well-drained soil in a warm, sunny position. Most tulips I planted on my allotment come back every year. Best tulips for naturalising seem to be the Darwin hybrids, Ballerina tulips, Viridiflora tulips, Kaufmannia and Fosteriana tulips. Also most of the wild tulips come back every year.