Monarch Magic Ageratum is a compact flowering cultivar that brings vibrant color to gardens from early summer through the first frost. This frost-tender annual grows to a tidy 12 inches tall and spreads 8 to 12 inches wide, thriving in full sun across hardiness zones 10 and 11. Its extended bloom window from June through November means weeks of continuous flowers, while its deer-resistant nature and pollinator magnetism make it a smart choice for gardens where wildlife pressure is a concern.
Full Sun
Moderate
10-11
12in H x 12in W
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High
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Monarch Magic blooms reliably from summer deep into fall, offering an unusually long season of color in a compact, manageable form. The variety resists deer browsing while actively attracting pollinators, creating a garden that feels alive with activity. At just 12 inches tall and 8 to 12 inches wide, it fits neatly into borders, containers, and small spaces without becoming leggy or sprawling.
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Start seeds indoors 6 to 8 weeks before your last spring frost. Sow seeds on the surface of moist seed-starting mix at a temperature of 70 to 75 degrees Fahrenheit; do not cover them, as they need light to germinate. Keep the soil consistently moist and provide bright, indirect light. Seedlings should emerge within 7 to 10 days.
Harden off seedlings for 7 to 10 days before moving them outdoors. Transplant after all danger of frost has passed and soil has warmed. Plant on an overcast day or in late afternoon to reduce transplant shock. Space plants 8 inches apart.
Pinch back growing tips on young plants in early summer to encourage branching and denser flowering. Deadhead spent flowers regularly throughout the season to keep plants compact and promote continuous blooming until frost.
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