How to Grow Souvenir de Bonn
Souvenir de Bonn
Pelargonium × hortorum 'Souvenir de Bonn'
flowerSouvenir de Bonn is a striking zonal geranium cultivar renowned for its vibrant scarlet-red flowers and distinctive variegated foliage with white or cream margins. The plant produces abundant clusters of semi-double blooms throughout the growing season, making it an excellent choice for borders, containers, and hanging baskets. Its compact, bushy habit and ornamental leaves provide year-round visual interest even when not in bloom.
When should you plant Souvenir de Bonn in your zone?
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Example Souvenir de Bonn timeline · Pittsburgh, PA (Zone 6b)
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Plant Souvenir de Bonn
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 Souvenir de Bonn blooms
Around Jun 1≈ 45 days after planting
Sample dates for Pittsburgh, PA. Sign up to get exact Souvenir de Bonn dates for your own zip code.
Growing Conditions
Soil
Growing Zones
Find your zone →Zones 10-11; grows as a tender annual in cooler zones or must be overwintered indoors
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Seedling
2-3 weeksTiny seedlings emerge with rounded cotyledons; first true leaves appear oval and fuzzy
Provide bright light immediately to prevent leggy growth; maintain moist (not wet) soil; maintain 65-75°F temperature
Vegetative Growth
4-6 weeksPlant develops bushy form with increasingly visible variegated foliage; white or cream leaf margins become prominent
Pinch growing tips to encourage branching; water moderately; apply balanced fertilizer every 2-3 weeks; ensure air circulation
Budding
2-3 weeksFlower buds form in clusters (umbels) at stem tips; buds are compact and tightly grouped
Maintain consistent watering schedule; shift to phosphorus-rich fertilizer to promote flowering; ensure full sun exposure
Flowering
8-16 weeks (spring through fall)Brilliant scarlet-red semi-double flowers open progressively within each cluster; blooms last 1-2 weeks per flower
Deadhead spent flower clusters to encourage continuous blooming; maintain regular watering; continue fertilizing every 2-3 weeks
Late Season/Dormancy
Variable depending on climateGrowth and flowering slow in cooler months; foliage becomes less vibrant; plant transitions toward dormancy
Reduce watering significantly; cut back on fertilizer; prepare for overwintering indoors in cold zones; avoid disturbing plant
Companion Planting
Plan your garden →Plant with:
Avoid planting near:
Common Pests
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Hand-pick affected buds; use Bacillus thuringiensis (Bt) sprays; remove heavily infested plant parts
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Spray with insecticidal soap; use yellow sticky traps; ensure good air circulation; release beneficial parasitic wasps
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Increase humidity; spray with water to dislodge; use neem oil or insecticidal soap; avoid excessive heat
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Remove with rubbing alcohol on cotton swab; spray with insecticidal soap; isolate infested plants
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Remove and destroy infected plants; control whiteflies and aphids that vector the virus; no cure available
Uses
Ornamental garnish and scented leaves
CulinaryWhile Souvenir de Bonn is not typically consumed, zonal geranium leaves have a pleasant floral scent that some gardeners use to garnish cocktails and desserts for aroma and visual appeal. The variegated foliage provides aesthetic value in culinary presentations. [source]
Traditional herbal preparations
MedicinalZonal geraniums contain geraniol and other volatile compounds; historically used in herbal medicine traditions for potential mild antimicrobial and anti-inflammatory properties, though clinical evidence is limited. Often brewed as a fragrant tea. [source]
Natural air freshener and fragrance
HouseholdCrushed geranium leaves release a pleasant, peppery-floral scent useful for naturally freshening indoor spaces. Dried leaves can be added to potpourri or sachets for closets and drawers. [source]
Cut flower arrangements and floral design
CraftThe bold scarlet blooms and variegated foliage make Souvenir de Bonn an excellent choice for fresh floral arrangements, mixed bouquets, and garden design. The semi-double flowers add texture and color to wedding and event displays. [source]
Pollinator attraction
WildlifeThe abundant red flowers attract bees, butterflies, and other pollinators to gardens, supporting local ecosystem health. The continuous blooms provide nectar throughout the growing season. [source]
This is not medical advice. LizPlants is not a medical resource. Always consult a qualified healthcare professional before using plants medicinally.
Harvest Tips
Souvenir de Bonn is grown primarily for ornamental flowers and foliage rather than harvest. Deadhead spent flower clusters by pinching or cutting just below the spent blooms to extend flowering throughout the season. Cut stems for floral arrangements in early morning when flowers first open. Foliage may be gently harvested for scent or arrangements without damaging the plant.
Fun Facts
- 🌱 Souvenir de Bonn was named to commemorate the city of Bonn, Germany, and has been a cherished heirloom geranium variety since its introduction in the 19th century.
- 🌱 The variegated foliage pattern develops more prominently in bright light; plants grown in shade may display less dramatic leaf coloration.
- 🌱 Zonal geraniums like Souvenir de Bonn are called 'zonal' because of the darker concentric rings or zones visible on their leaves, which are thought to help regulate the plant's water and nutrient uptake.
Gardening Terms
New to gardening? Learn about terms used in this guide:
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