How to Grow Sweet Violet 'Marie Louise'
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Sweet Violet 'Marie Louise'
Viola odorata 'Marie Louise'
flowerMarie Louise is a classic, highly fragrant cultivar of sweet violet producing deep purple-blue double flowers with a sweet, intoxicating scent. This low-growing perennial is a favorite for cutting gardens, cottage gardens, and forcing indoors for winter bloom. It has heart-shaped green foliage and compact growth, typically reaching 4-6 inches in height.
When should you plant Sweet Violet 'Marie Louise' in your zone?
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Example Sweet Violet 'Marie Louise' timeline · Pittsburgh, PA (Zone 6b)
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Plant Sweet Violet 'Marie Louise'
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 Sweet Violet 'Marie Louise' blooms
Around Jun 16≈ 60 days after planting
Sample dates for Pittsburgh, PA. Sign up to get exact Sweet Violet 'Marie Louise' dates for your own zip code.
Growing Conditions
Soil
Growing Zones
Find your zone →Thrives in zones 5-8; can survive zone 4 with winter protection and succeeds into zone 9 with afternoon shade
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Establishment
4-6 weeksNewly planted or young plants developing root systems with small rosettes of heart-shaped foliage
Keep soil evenly moist. Mulch lightly around plants. Avoid planting too deep. Provide afternoon shade. Allow 4-6 weeks to establish before expecting flowers
Vegetative Growth
3-4 weeks (spring/fall) or ongoing in cool climatesFoliage expands, forming dense low mounds of dark green heart-shaped leaves. No flowers yet; plant focuses on root and leaf development
Water consistently. Remove any dead or damaged leaves. Fertilize monthly with balanced fertilizer. Provide cool conditions for best growth
Budding
2-3 weeksFlower buds appear on short stems among the foliage. Buds are initially green, gradually showing purple coloring
Maintain consistent moisture. Do not allow plants to dry out. Increase phosphorus-rich fertilizer to support flower development. Ensure good air circulation
Flowering
4-8 weeks (spring); 3-6 weeks (fall)Deep purple-blue double flowers bloom abundantly close to the foliage. Flowers are highly fragrant, typically appearing in early spring and again in fall
Deadhead spent flowers to encourage continued blooming. Maintain moisture and cool temperatures. Cut flowers for arrangements and fragrance indoors. Pollinate double flowers by hand if desired for seed production (unlikely to set seed)
Post-Flowering/Dormancy
Variable; 2-4 months in summer heatAfter spring bloom, foliage may thin during hot summers. Plant may go dormant or semi-dormant in summer heat; revives in fall as temperatures cool
Reduce watering gradually in summer. Cut back dead foliage. Provide afternoon shade and extra mulch in hot climates. Resume regular watering in fall as growth resumes. Do not fertilize during dormancy
Companion Planting
Plan your garden →Plant with:
Avoid planting near:
Common Pests
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Spray with water to dislodge; use insecticidal soap or neem oil if severe. Encourage beneficial insects like ladybugs
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Increase humidity and water misting. Apply neem oil or miticide if population is high. Ensure good air circulation
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Hand-pick in early morning. Use slug baits or beer traps. Provide barriers of coarse sand or diatomaceous earth. Remove hiding spots and mulch
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Improve air circulation. Avoid wetting foliage. Apply sulfur dust or fungicide if severe. Remove affected leaves. Water at base only
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Remove affected leaves immediately. Improve drainage and air circulation. Avoid overhead watering. Apply fungicide if widespread
Uses
Crystallized flowers and garnish
CulinarySweet violet flowers have been used for centuries to garnish desserts, cakes, and beverages. They can be candied with egg white and sugar to create delicate edible decorations, or used fresh to garnish salads and special dishes. [source]
Traditional herbal remedy
MedicinalSweet violet has been used in traditional herbal medicine for respiratory health, supporting the body's natural defense mechanisms. Flower and leaf infusions have been traditionally prepared as teas and tinctures. [source]
Fragrance and perfumery
HouseholdThe intensely sweet fragrance of 'Marie Louise' violets makes them highly valued for perfumery, fragrant water, and essential oil production. The scent has been a staple in luxury perfumes and classic floral arrangements for centuries. [source]
Cutting garden and floral arrangements
CraftThe charming double flowers and remarkable fragrance make Marie Louise an essential cut flower for spring and fall bouquets, nosegays, and floral design. A small vase of these violets perfumes an entire room. [source]
Pollinator support
WildlifeWhile the double flowers may not set seed readily, violets provide early spring and fall nectar and pollen resources for bees and other pollinators when other flowers are scarce. [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 when stems are fully hydrated for longest vase life (up to 7 days with daily water changes). Remove lower leaves from stems. Cut regularly to encourage more blooms. Violets are prized for cutting and can be dried or crystallized. Peak flowering occurs in spring (March-April in most zones) and again in fall (September-October)
Fun Facts
- 🌱 Marie Louise' is believed to be a Victorian-era cultivar, originating in France, and remains one of the most famous and sought-after sweet violet varieties worldwide.
- 🌱 Sweet violets contain a compound called ionone that has a unique property: it temporarily numbs the olfactory receptors in your nose, so you cannot smell the fragrance after a few moments—but it reappears moments later when your senses reset, creating the illusion that the scent comes and goes.
- 🌱 Napoleon Bonaparte was famously devoted to violets and made them his symbol; after his exile, supporters wore violets as a secret token of loyalty and would ask each other, 'Do you love violets?' as a coded message.
Gardening Terms
New to gardening? Learn about terms used in this guide:
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