Propagating BlackberryLily. Similar to the way that iris or daylily rhizomes can be divided, you can propagate blackberrylilies in the same way—by digging and dividing the root clumps. Blackberrylily is a gorgeous perennial to grow for stunning orange color in your yard or garden and is suitable for Hardiness zones 5 through 10. Fertilizing: BlackberryLily doesn’t require heavy feeding. You can apply a balanced, all-purpose fertilizer in the spring when new growth emerges. 1. Grow blackberrylilies from seed. For the best results, store your blackberrylily seeds in the refrigerator until you’re ready to plant them. Order blackberrylilies now and get free shipping on orders over $39! Pick your perfect plant today and set your garden apart from the rest! TN Nursery strives to provide the best for... Visit Monticello’s Online Shop to check for seeds or plants of BlackberryLily. Typical Bloom Dates: July—August Color(s): Orange, Reds, Yellow Location at Monticello: West Lawn. BlackberryLily Plants. BlackLily Flower In Garden.BlackberryLily Flower Meaning. Iris Germanica Montmartre Care. How To Grow Leopard Lilies. BlackberryLily is an introduced plant from Asia. Media by John Beetham. The fruit of BlackberryLily in Carroll Co., Maryland (). View Record Details Media by Matthew Beziat. Iris domestica, commonly called blackberrylily or leopard lily, is an erect, rhizomatous perennial which typically grows 2-3' tall. Lily-like, deep orange flowers (to 2" across), heavily...