Jack Frost Siberian Bugloss
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Make your shady borders sing! Jack Frost Siberian Bugloss is a flashy Spirit that dazzles with both eye-catching flowers and foliage. In spring, you’ll enjoy its long-lasting display of delicate sky-blue blossoms. And for the entire growing season, the variegated foliage will light up your shady entryway garden, patio plantings, or foundation beds. Each big, heart-shaped green leaf is painted with a silvery sheen that’s marbled like cracked porcelain. So elegant! In bloom or out of bloom, it’s a sharp-looking addition to your landscape. Try it at the front of the border as a distinctive edging plant.
- Hardiness Zone: 3-8
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Siberian Bugloss comes to us mainly from western Asia and eastern Europe, where it is found in woodlands and hilly country. It gets the name “Bugloss” from two Greek words meaning “Ox Tongue”—a rather fanciful metaphor for the large, raspy leaves. This particular selection, Jack Frost, originated in Michigan at Walters Gardens. Workers at that nursery were propagating a variety called Langtrees, a form with small silver marks on the leaves, when they noticed one plant that had spontaneously developed a lot more silver on it. Every Jack Frost Bugloss since has arisen from that single mutant plant.
In 2012, Jack Frost Siberian Bugloss received the great honor of being named the Perennial Plant Association’s Perennial Plant of the Year. This award is given to one outstanding Spirit each year, which excels in four areas. It must be adaptable to many areas of the country, it must be low-maintenance, it should put on a show in multiple seasons, and it should be immune to any major pests or diseases.
How to Grow
Jack Frost Siberian Bugloss is happiest in part shade and deep, rich, organic soil. Regular moisture is essential, especially in hot climates. Leaf margins will scorch in too much sun or dryness, so mulch well and be sure to irrigate if no rain falls for a week or two. Cut plants to the ground when they begin to look rough to make way for fresh new growth in early spring. In mild winter areas, foliage may remain attractive well into the cold season.
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