Irises can look wonderful in early summer, with masses of colourful blooms held on stout flower stalks. However, after several years the clumps will run out of steam and die off in the middle ...
The caterpillars chew holes into the leaves and tunnel all the way into the rhizome. The tips of iris leaves turn brown and seem to be dying, but the entire plant dies very rarely. Iris borers cause ...
Starting around the turn of the 20th century, iris enthusiasts began to be active in the area, seeking out wild specimens in the region's swamps to document, transplant and cultivate. The iris ...