How to Grow Michaelmas Daisy
Michaelmas Daisy
Symphyotrichum novi-belgii
flowerMichaelmas daisy is a perennial flowering plant known for its profusion of small, daisy-like flowers in shades of purple, pink, blue, and white that bloom in late summer and fall. Named for the autumn Michaelmas holiday, these hardy plants are valued for extending the garden's color into the cooler months. They are easy to grow and provide excellent cut flowers and pollinator support.
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Example Michaelmas Daisy timeline · Pittsburgh, PA (Zone 6b)
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Plant Michaelmas Daisy
Around Apr 17Near Pittsburgh's average last spring frost.
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Tend & protect
Late spring–summerWatering, feeding, and pest-watch reminders.
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First Michaelmas Daisy blooms
Around Jun 16≈ 60 days after planting
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Growing Conditions
Soil
Growing Zones
Find your zone →Thrives in zones 3-9; best in zones 4-8
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Seedling
2-3 weeksSmall seedlings with true leaves emerge; plants develop a compact rosette form
Keep soil moist but well-draining; provide bright indirect light; thin seedlings to prevent overcrowding
Vegetative Growth
6-8 weeksPlant develops bushy foliage with multiple stems and increasing leaf coverage; no flowers yet
Pinch back growing tips in early summer to encourage bushier growth; water regularly; fertilize monthly with balanced fertilizer
Budding
2-3 weeksFlower buds begin to form at branch tips; plant becomes fuller and more structured
Continue regular watering and fertilization; deadhead any early flowers to redirect energy; stake taller varieties if needed
Flowering
6-8 weeksProfuse small daisy-like flowers bloom in clusters; peak bloom occurs in late August through October
Deadhead spent flowers to encourage continued blooming; water during dry spells; stake if necessary; enjoy as cut flowers
Dormancy
4-5 months (winter)Plant dies back after frost; foliage browns and withers; roots remain alive underground
Cut back dead stems to 2-3 inches above ground in late fall or early spring; reduce watering; apply mulch for protection in cold zones
Companion Planting
Plan your garden →Plant with:
Avoid planting near:
Common Pests
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Ensure good air circulation; avoid overhead watering; apply sulfur or neem oil spray if needed; choose mildew-resistant varieties
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Spray with water to dislodge; use insecticidal soap; encourage beneficial insects like ladybugs
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Increase humidity with regular misting; spray with neem oil or insecticidal soap; prune heavily infested stems
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Hand-pick in early morning; use beetle traps away from plants; apply neem oil
Uses
Edible Flowers
CulinaryMichaelmas daisy flowers can be used as edible garnishes in salads and desserts, offering a slightly bitter flavor and colorful decoration. [source]
Cut Flowers & Floral Arrangements
HouseholdLong-lasting cut flowers ideal for bouquets, fall arrangements, and seasonal floral displays, providing late-season color when most gardens are fading. [source]
Pollinator Support
WildlifeAbundant nectar and pollen sources attract bees, butterflies, and other beneficial insects during late summer and fall when food sources are scarce. [source]
Traditional Herbal Remedy
MedicinalTraditionally used in herbal medicine as a diuretic and for treating respiratory ailments, though scientific evidence is limited. [source]
Dried Flowers
CraftFlowers can be dried for use in dried arrangements, pressed flower crafts, and decorative dried bouquets that last year-round. [source]
This is not medical advice. LizPlants is not a medical resource. Always consult a qualified healthcare professional before using plants medicinally.
Harvest Tips
Cut flowers in the morning after dew dries but before heat of day; use sharp scissors and cut stems at a 45-degree angle; include at least 3-4 sets of leaves on the stem; change water every 2-3 days; flowers last 1-2 weeks in a vase
Fun Facts
- 🌱 Michaelmas daisies are named after the feast day of St. Michael the Archangel on September 29th, which falls around their peak bloom time in Europe.
- 🌱 These plants can become quite large and vigorous; some cultivars reach 4-5 feet tall, making them excellent for the back of borders and creating dramatic fall displays.
- 🌱 Michaelmas daisies are actually native to North America but were developed and popularized in Europe during the Victorian era before being reintroduced to American gardens.
Gardening Terms
New to gardening? Learn about terms used in this guide:
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