Sulphurea OkeechobeeText Box: SULPHUREA OKEECHOBEE Lemon yellow blooms. Tolerates some shade. Marliac rhizome. Leaves are marbled. Medium to large leaf spread 4-6ft+ This hardy lily is a perennial plant and will go dormant in the winter, and will winter over in zone 4 and above if planted where the root ball doesn’t freeze. Weather permitting we start shipping in late March to early April and continue until September In optimum conditions will reach full potential of leaf spread (this is not referring to size of the leaves) we are speaking of the area that the leaves will cover.