Blue Monday Sage Salvia is an heirloom annual that has captivated cottage gardeners with its stunning long-lasting blue flower spikes. This 2-foot plant produces blooms continuously throughout the growing season, creating a striking vertical accent in any garden. Hardy across zones 2-11 and thriving in full sun with moderate humidity and well-drained soil, it germinates quickly (10-30 days) when started indoors and reaches mature size at just 8 inches apart. The combination of frost hardiness and extended bloom period has made it increasingly popular among gardeners seeking reliable, season-long color.
Full Sun
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2-11
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Moderate
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Long-lasting blue flower spikes emerge continuously over months, transforming a modest 2-foot plant into a reliable cottage garden showstopper. Seeds germinate in just 10-30 days when kept moist, and the plant's frost hardiness means you can start seeds indoors early without worry about late spring frosts killing transplants. Its compact spacing requirement (8 inches) allows gardeners to create dense drifts of color even in smaller spaces.
Blue Monday Sage Salvia is grown primarily as an ornamental flower for cottage gardens and mixed borders, where its tall blue spikes provide vertical interest and continuous summer color. The long-lasting blooms make it suitable for fresh-cut arrangements.
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Sow seeds indoors approximately 10 weeks before your last spring frost date. Sprinkle seeds just 1/16 inch below the soil surface and keep the soil moist until germination occurs (typically 10-30 days). Maintain temperatures around 65-75°F during the germination period. Once seedlings develop their first true leaves, provide bright light to prevent leggy growth.
Transplant seedlings outdoors after the last frost date when soil has warmed. Space plants 8 inches apart in full sun locations. Harden off seedlings by gradually exposing them to outdoor conditions over 7-10 days before permanent planting.
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