How to Grow Zonal Geranium
Wikimedia Commons
Zonal Geranium
Pelargonium × hortorum
flowerZonal geraniums are versatile flowering plants prized for their showy clusters of red, pink, white, or bicolor blooms and distinctive horseshoe-shaped leaf markings. They are reliable, long-blooming perennials typically grown as annuals in colder climates. These bushy plants adapt well to containers and garden beds, making them popular for patios, windowboxes, and mass plantings.
Looking for a specific variety?
When should you plant Zonal Geranium in your zone?
Get a personalized planting timeline — when to start seeds, transplant, and harvest — based on your USDA zone and local frost dates. Free to start.
Example Zonal Geranium timeline · Pittsburgh, PA (Zone 6b)
-
Plant Zonal Geranium
Around Apr 17Near Pittsburgh's average last spring frost.
-
Tend & protect
Late spring–summerWatering, feeding, and pest-watch reminders.
-
First Zonal Geranium blooms
Around Jun 1≈ 45 days after planting
Sample dates for Pittsburgh, PA. Sign up to get exact Zonal Geranium dates for your own zip code.
Growing Conditions
Soil
Growing Zones
Find your zone →Thrives in zones 10-11 year-round; grown as summer annuals in zones 3-9
Sign up free to see if Zonal Geranium grows in your zone — and get a personalized planting timeline.
Get my Zonal Geranium timeline →Growth Stages
Seedling
2-3 weeksTiny plants with 2-4 true leaves appear 10-14 days after sowing. Leaves are small and pale green.
Provide bright indirect light, maintain consistent moisture without waterlogging, maintain 70-75°F temperature. Thin seedlings if overcrowded.
Vegetative Growth
3-4 weeksYoung plants develop bushy foliage with multiple stems. Characteristic zonal markings (reddish-brown horseshoe pattern) begin appearing on leaves.
Pinch off growing tips at 4-6 inches to encourage bushier growth. Maintain full sun and moderate watering. Begin light fertilizing.
Budding & Early Flowering
2-3 weeksFlower clusters (umbels) form at stem tips. Buds swell with color beginning to show. First flowers open.
Increase fertilizer to promote blooming. Maintain consistent watering and full sun. Remove spent flowers to encourage continued blooming.
Blooming
8-12 weeks or longer until frost/season endPlants produce abundant flower clusters in reds, pinks, whites, or bicolors. Blooming is continuous with proper care.
Deadhead spent flowers regularly. Water when soil surface is dry. Fertilize every 2-3 weeks with balanced or slightly higher phosphorus formula.
Decline & End of Season
Varies by climateFlowering slows as temperatures cool or daylength decreases. Foliage may become less vibrant.
In warm zones, reduce watering and fertilizer for winter dormancy. In cold zones, dig up plants before frost, dry off, and store in cool (50-60°F) location for overwintering, or discard.
Companion Planting
Plan your garden →Plant with:
Avoid planting near:
Common Pests
-
Spray with insecticidal soap or neem oil; yellow sticky traps; ensure good air circulation
-
Increase humidity, spray with water forcefully, apply miticide or neem oil if severe; improve air circulation
-
Remove with alcohol-dipped cotton swab, spray with insecticidal soap or horticultural oil
-
Spray with strong water stream, insecticidal soap, or neem oil; encourage natural predators
-
Hand-pick damaged buds, remove fallen plant material, use Bacillus thuringiensis (Bt) if necessary
Uses
Scented Geranium Varieties
CulinaryCertain scented geranium varieties (Pelargonium species with lemon, rose, apple, or mint-scented leaves) are used to flavor teas, desserts, and beverages. The ornamental zonal geranium flowers are also edible and used as garnish. [source]
Traditional Herbal Remedy
MedicinalGeranium species have been used in traditional medicine for respiratory and digestive support. Essential oil from scented varieties has been studied for antimicrobial properties. [source]
Cut Flower Arrangements
HouseholdZonal geranium blooms make excellent long-lasting cut flowers for bouquets and arrangements, lasting 7-10 days in water when stems are cut and placed immediately in fresh water. [source]
Potpourri & Dried Flowers
CraftDried geranium flowers retain color and can be used in potpourri, wreaths, and other dried floral crafts. Scented varieties dry particularly well for fragrant potpourri. [source]
Pollinator Support
WildlifeZonal geranium flowers attract bees, butterflies, and other pollinating insects, making them valuable for supporting garden pollinators and benefiting the broader ecosystem. [source]
This is not medical advice. LizPlants is not a medical resource. Always consult a qualified healthcare professional before using plants medicinally.
Harvest Tips
Geraniums are ornamental flowers; deadhead (remove spent flower clusters) regularly throughout the blooming season to encourage continuous flowering. For seed collection, allow some flowers to mature and dry on the plant; harvest dried seed heads and store in cool, dry location. For propagation, take 3-4 inch soft cuttings in spring or summer and root in moist soil or water.
Fun Facts
- 🌱 Zonal geraniums got their name from the distinctive dark horseshoe or zone-shaped markings on their leaves, which are caused by differences in leaf pigmentation.
- 🌱 Geraniums were extremely popular in Victorian era gardens and symbolize happiness, health, and friendship in the language of flowers.
- 🌱 Zonal geraniums can live for many years; overwintered plants often rebloom more prolifically the following season, with some plants living 5+ years indoors or in warm climates.
Gardening Terms
New to gardening? Learn about terms used in this guide:
Join 30,000 gardeners planning their gardens with LizPlants.
Get your personalized Zonal Geranium planting timeline
Tell us your zip code and we'll calculate exactly when to start Zonal Geranium seeds, transplant seedlings, and harvest — based on your USDA zone and local frost dates. Includes calendar reminders and printable task lists. Free to start.
Get my Zonal Geranium timeline →