Geraniums are one of the most popular and profitable annual flowers in the world — a staple of spring greenhouse production, landscape beds, hanging baskets, and container gardens. They're beloved by homeowners, demanded by landscapers, and a reliable seller for any grower who produces them. And when you grow them from bulk seed, the economics are exceptional.
This guide covers everything you need to know about buying and growing bulk geranium seeds: the best varieties for different uses, germination requirements, growing tips, and how to build a geranium lineup that sells out every spring.
Why Grow Geraniums from Bulk Seed?
Geraniums are traditionally propagated from cuttings, but seed-grown geraniums have come a long way in recent decades. Modern seed geranium varieties offer excellent uniformity, strong performance, and a wide color range — all at a fraction of the cost of cutting-grown plants.
Here's why bulk seed makes sense for commercial growers:
- Cost savings: Seed geraniums cost pennies per plant to produce vs. $0.50–$1.50 per cutting-grown plug from a wholesale supplier.
- Variety control: Grow exactly the colors and series your market demands, in the quantities you need.
- Disease-free start: Seed-grown plants start clean, with no risk of inheriting diseases from cutting stock.
- Timing flexibility: Start your own plugs on your schedule, not a supplier's.
Understanding Geranium Types: Zonal vs. Ivy
Before choosing varieties, it's important to understand the two main types of seed geraniums and where each excels:
Zonal Geraniums (Pelargonium x hortorum)
Zonal geraniums are the classic upright geranium with bold, rounded flower heads and distinctive leaf markings (zones). They're the most widely grown type for landscape beds, containers, and window boxes. They're heat tolerant, long blooming, and available in a huge range of colors. Our Maverick Geranium Bulk Seeds are a top commercial zonal variety — compact, uniform plants with large flower heads and excellent heat tolerance.
Ivy Geraniums (Pelargonium peltatum)
Ivy geraniums have a trailing, cascading habit that makes them perfect for hanging baskets, window boxes, and container edges. Their glossy, ivy-shaped leaves and abundant blooms create a lush, full look that customers love. They're also more heat tolerant than many people realize, making them a great choice for summer containers in warm climates.
Top Bulk Geranium Varieties for Commercial Growers
Maverick Series — The Commercial Zonal Standard
The Maverick series is one of the most widely grown zonal geranium series in commercial production. It offers excellent uniformity, compact habit, large flower heads, and outstanding heat tolerance. Our Maverick Geranium Bulk Seeds are a reliable choice for landscape beds, 4-inch pots, and mixed containers. A must-have for any spring greenhouse operation.
Ringo 2000 Series — Bold Colors and Strong Performance
The Ringo 2000 series delivers large, vibrant flower heads on compact, well-branched plants. It's an excellent choice for growers who want maximum color impact in landscape beds and containers. Top picks include:
- Geranium Ringo 2000 Cardinal — a rich, true red that is always one of the top-selling geranium colors. Bold, saturated, and eye-catching in any planting.
- Geranium Ringo 2000 Salmon — a warm, coral-salmon tone that pairs beautifully with white and yellow in mixed plantings. A consistent top seller at market.
- Geranium Ringo 2000 Pink — a classic, bright pink that appeals to a wide range of customers and works in virtually any landscape or container design.
Tornado Series — The Ivy Geranium for Baskets and Containers
The Tornado series is one of the best ivy geranium series available for commercial production. It's compact enough for 10-inch baskets, heat tolerant for summer sales, and produces an abundance of blooms all season. Top picks include:
- Ivy Geranium Tornado Mix — a full color blend that's perfect for mixed basket production. One SKU covers your entire ivy geranium lineup.
- Ivy Geranium Tornado Red — a bold, classic red that is the top-selling ivy geranium color in most markets.
- Ivy Geranium Tornado Rose — a rich rose-pink with excellent basket performance and a long bloom period.
- Ivy Geranium Tornado Bicolor Duet — a striking bicolor variety with white and pink blooms that adds visual interest and uniqueness to any basket display.
Germination Guide for Bulk Geranium Seeds
Geraniums are moderately challenging to germinate compared to crops like zinnias or marigolds, but with the right conditions they're very reliable. Here's what you need to know:
Temperature
Maintain media temperature at 72–75°F for best germination. Use bottom heat mats and verify with an infrared thermometer. Temperatures below 65°F will slow germination significantly.
Light
Geranium seeds require light to germinate — do not cover with growing media. Press seeds gently into the surface of a fine germination mix and cover lightly with coarse vermiculite to maintain moisture contact while still allowing light penetration.
Moisture
Keep the germination media consistently moist but never waterlogged. Use a humidity dome for the first 3–5 days, then remove to improve airflow and reduce damping off risk. Germination typically occurs in 5–10 days under ideal conditions.
Tray Selection
Use 288-cell plug trays for most geranium production. This gives you a good-sized plug that transplants well into 4-inch pots or 6-packs without excessive root disturbance.
Growing On: From Plug to Finished Plant
Once geranium seedlings have their first true leaves, they're ready to move out of the germination environment and into the growing greenhouse. Key tips for the growing-on phase:
- Temperature: Grow at 60–65°F nights and 65–70°F days. Cooler temperatures produce compact, well-branched plants. Avoid temperatures above 75°F which cause stretching.
- Light: Geraniums need high light — at least 4,000–6,000 foot-candles. Supplement with grow lights in low-light winter conditions.
- Fertilizer: Feed with a balanced fertilizer at 150–200 ppm nitrogen once true leaves appear. Alternate with a calcium-magnesium supplement every 2–3 weeks.
- Pinching: Pinch seedlings once when they have 4–5 true leaves to encourage branching and a fuller finished plant.
- Crop time: Expect 14–16 weeks from seeding to a finished flowering 4-inch pot.
Timing Your Geranium Crop for Spring Sales
For a May 1 spring sale date, seed your geraniums in mid-January (14–16 weeks out). For a Mother's Day peak (mid-May), seed in late January to early February. Geraniums are one of the most important spring crops — having them ready and in full color for Mother's Day weekend is critical for maximizing revenue.
Related Reading
For more on building a profitable spring greenhouse operation, check out our Complete Greenhouse Seed Starting Guide — covering trays, temperatures, timing, and the top bulk varieties for commercial plug production.
Frequently Asked Questions
How long do geraniums take to grow from seed?
Seed geraniums take 14–16 weeks from seeding to a finished flowering plant in a 4-inch pot. For spring sales, seed in mid-January to early February depending on your target sale date.
Are seed geraniums as good as cutting geraniums?
Modern seed geranium varieties are excellent performers that rival cutting-grown plants in uniformity, bloom size, and garden performance. They also start disease-free and cost significantly less to produce. For commercial growers, seed geraniums offer a compelling combination of quality and economics.
What is the difference between zonal and ivy geraniums?
Zonal geraniums are upright plants with bold, rounded flower heads ideal for landscape beds and containers. Ivy geraniums have a trailing, cascading habit perfect for hanging baskets and window boxes. Both types are available in bulk seed and are strong sellers in the spring market.
What temperature do geranium seeds need to germinate?
Geranium seeds germinate best at a media temperature of 72–75°F. Use bottom heat mats and verify with an infrared thermometer. Do not cover seeds with growing media — they require light to germinate.
How many geranium seeds do I need per flat?
For 288-cell plug trays, you need 288 seeds per tray. Always order 10–15% extra to account for germination variability. For large-scale production, buying in bulk quantities significantly reduces your per-seed cost.
Where can I buy bulk geranium seeds?
Trailing Petunia Bulk Seeds carries a wide selection of professional-grade bulk geranium seeds including zonal and ivy varieties in commercial quantities. For smaller trial packs, visit www.trailingpetunia.com.
Ready to add geraniums to your spring lineup? Browse our full selection of bulk geranium seeds at Trailing Petunia Bulk Seeds and build the geranium program your customers are looking for. For smaller trial quantities, visit trailingpetunia.com.