Mignon Single Dahlias are compact, rounded plants reaching about 20 inches tall, bred for their ability to deliver big visual impact in small spaces. The flowers are single-petaled blooms at a generous 3-4 inches across, with petals of unusually heavy substance that hold their shape beautifully. Colors span classic dahlia tones: white, pink, mauve, soft yellow, and red. These heirloom plants thrive in zones 7-10 and grow best in full sun with ideal temperatures between 70-75°F, making them excellent candidates for containers, window boxes, and garden bedding.
Full Sun
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7-10
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High
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The real draw here is the flower itself: single blooms with remarkably thick, substantial petals that look far more elegant than their compact plant size would suggest. At 3-4 inches wide, each flower reads as a substantial ornament rather than a delicate accent. The color range delivers perky, vibrant tones without any muddy or washed-out shades, and the compact 20-inch habit means you can pack multiple plants into containers or borders without creating a jungle.
Mignon Single Dahlias are grown primarily for cut flowers and garden display. The compact habit makes them ideal for container gardening, window boxes, and small-scale garden beds where you want maximum visual impact without sprawling stems. The single flower form and substantial petal texture make each bloom an attractive cut flower for small arrangements or accent bouquets.
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Start seeds indoors 4-6 weeks before your last frost date. Sow seeds at a depth of 1/8 inch in seed-starting mix. Maintain soil temperature at 70-75°F. Seeds will sprout in 7-14 days. Transplant seedlings into individual pots once they develop true leaves.
Harden off seedlings by gradually exposing them to outdoor conditions over 7-10 days. Transplant outdoors after all danger of frost has passed and soil has warmed to at least 60°F. Space plants 18-24 inches apart. Handle seedlings gently, as dahlias have delicate roots.
Cut flowers in the early morning when stems are fully hydrated. Select blooms that are fully open but still crisp, with petals that feel thick and substantial. Cut stems just above a leaf node to encourage side shoots. Change vase water every 2-3 days and recut stems at an angle to extend vase life.
Pinch the growing tip when plants reach 6 inches tall to encourage branching and fuller, more compact plants. Deadhead spent single flowers regularly throughout the season to keep blooms coming. Remove any damaged or diseased foliage as needed.
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“Mignon Single Dahlia belongs to the Dahlia variabilis group, the heirloom lineage that preserves the genetic diversity of dahlias before intensive modern hybridization narrowed the palette. The Mignon type was specifically developed as a bedding dahlia, bred down to a manageable size without sacrificing flower size or petal quality. This variety represents the seed-saving tradition of gardeners who recognized that not every dahlia needed to be a 6-foot giant; compact plants with large flowers had equal garden value and far greater practicality.”