The old-fashioned shamrock houseplant is now high fashion. Several introductions from Proven Winners push this group to the fore for its elegant foliage; abundant, delicate flowers; and vigor. Only 6 to 10 inches high with a spread to 12 inches, this plant’s tiny, ¾-inch-wide, bronze-colored leaf clusters and bright yellow flowers are massed on trailing stems that spill over the sides of shaded window boxes and containers.
Noteworthy Characteristics:Nice houseplant.
Care:Though this shamrock is frost tender, it is easy to overwinter indoors.
Propagation:Sow fresh seed or divide rhizomes.
Problems:Fungal leaf spots, powdery mildew, rust, and seed smut are the most common problems, but also watch for spider mites and leaf miners.
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