Mint-shrub is a semi-woody deciduous shrub that arrives in autumn with something few garden plants offer: late-season flowers. Hardy from zones 4 to 8, this member of the mint family grows 3 to 5 feet tall and wide, producing narrow spikes of densely packed lilac-purple flowers from September through October. The real draw is the foliage: toothed, ovate leaves that release a distinctive minty fragrance when brushed or crushed. It's a plant that rewards you twice, first with fragrance during the growing season and again with showy blooms when many gardens are fading.
Full Sun
Moderate
4-8
60in H x 60in W
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Moderate
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Mint-shrub flowers precisely when most shrubs are winding down, sending up spikes of lilac-purple blooms that can reach 8 inches long. The foliage smells unmistakably minty, offering sensory appeal beyond visual interest. It thrives on benign neglect once established, tolerating drought and dry soil while asking for nothing more than full sun and low maintenance. Cold-hardy to zone 4, it stands tough through harsh winters and regrows reliably each spring.
Mint-shrub is primarily grown as an ornamental hedge or border shrub, valued for its combination of minty fragrance and late-season flowers. While it shares the mint family with culinary herbs, its use is decorative and sensory rather than for harvest; gardeners grow it for the experience of touching the leaves and breathing in their scent, and for the visual spectacle of lilac-purple blooms in early fall.
No timeline data available yet for this variety.
Start seeds indoors in flats or cells 6 to 8 weeks before your last spring frost. Maintain soil temperatures between 55 and 70 degrees Fahrenheit for reliable germination. Keep soil consistently moist but not waterlogged; seedlings should develop their first true leaves within 2 to 3 weeks.
Harden off seedlings over 7 to 10 days by gradually exposing them to outdoor conditions before transplanting. Move plants to their final location after the last frost date, spacing them 36 to 60 inches apart to accommodate mature width. Plant in full sun in well-drained soil with a pH of 6.0 to 7.5.
Prune mint-shrub in late winter before new growth appears. For a shrubby form, thin out crossing stems and remove any dead wood. If you prefer to grow it as an herbaceous perennial with fresh vigorous growth each year, cut the entire plant to the ground in late winter; new shoots will emerge from the base come spring, and blooms will form on this new growth by autumn.
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“The genus Elsholtzia honors Johann Sigismund Elsholtz (1623-1688), a Prussian horticulturist and physician whose work on gardening, Vom Garten-Baw, was popular enough in its time to shape how Europeans approached cultivation. By naming this shrub after him, botanists preserved the memory of a figure whose passion for plants helped define horticultural science in the 17th century. Stauntonii, the species epithet, reflects the plant's journey through cultivation and eventual recognition by Western gardeners.”