Lobelia is one of the most versatile and visually striking flowering plants available to commercial growers, landscapers, and farmers market vendors. With its jewel-toned blues, rich scarlets, soft roses, and crisp whites, lobelia delivers season-long color that sells itself. Whether you're filling hanging baskets, edging formal beds, or producing high-volume container programs, buying bulk lobelia seeds is the most cost-effective way to scale your production.
This guide covers everything you need to know: the best varieties for commercial use, germination and growing tips, scheduling for peak bloom, and how to choose the right series for your program.
Why Grow Lobelia from Bulk Seed?
Lobelia transplants and plugs are expensive at scale. Buying pelleted bulk seed gives you full control over your production timeline, dramatically reduces per-unit cost, and opens up variety selection far beyond what plug suppliers typically offer. Pelleted seeds are especially valuable for lobelia because the natural seed is extremely fine — pellets make handling, seeding, and spacing far more manageable in a commercial setting.
Key advantages of bulk lobelia seed programs:
- Lower cost per plant — especially important for high-volume basket and flat programs
- Scheduling flexibility — start exactly when your production calendar demands
- Variety depth — access trailing, mounding, and upright types across dozens of colors
- Pelleted seed precision — easier to handle, singulate, and direct-sow in trays
Best Bulk Lobelia Varieties for Commercial Production
Starship Series – Upright Lobelia for Containers & Borders
The Starship series is the go-to upright lobelia for commercial growers who need bold, heat-tolerant plants that perform in containers, mixed planters, and landscape borders. Starship varieties are vigorous, well-branched, and produce large flowers relative to the plant size. They hold up better in summer heat than trailing types, making them ideal for late-spring and summer programs.
- Lobelia Starship Blue Pelleted Seeds — The classic. Deep, saturated blue with a white eye; a top seller for mixed containers and landscape edging. Pairs beautifully with white alyssum and yellow marigolds.
- Lobelia Starship Scarlet Pelleted Seeds — Vivid scarlet-red blooms on compact, upright plants. Exceptional for patriotic programs, red-white-blue combos, and high-contrast mixed baskets.
- Lobelia Starship Scarlet Bronze Leaf Pelleted Seeds — Scarlet flowers over striking bronze-tinted foliage. A premium variety that adds a designer look to upscale container programs and farmers market displays.
- Lobelia Starship Rose Pelleted Seeds — Soft rose-pink blooms that complement pastel mixed planters. A strong seller for Mother's Day and spring gift programs.
- Lobelia Starship Burgundy Pelleted Seeds — Deep wine-burgundy flowers with excellent heat tolerance. Ideal for fall-themed containers and sophisticated mixed plantings.
Regatta Series – Trailing Lobelia for Hanging Baskets
The Regatta series is the industry standard for trailing lobelia in hanging basket programs. Plants cascade beautifully over the edges of baskets and window boxes, producing a continuous flush of bloom from spring through fall in cooler climates. Regatta varieties are heat-tolerant for a trailing type and recover well after summer stress.
- Lobelia Regatta Mix 1,000 Multi Pelleted Seeds — A balanced blend of Regatta colors for maximum visual impact in mixed baskets. Efficient for growers who want variety without managing multiple SKUs.
- Lobelia Regatta White 1,000 Multi Pelleted Seeds — Clean, bright white trailing flowers. Essential for white-themed programs, wedding season production, and high-contrast mixed baskets.
Palace Series – Compact Mounding Lobelia
The Palace series produces compact, mounding plants ideal for 4-inch pots, six-packs, and front-of-border landscape use. Palace varieties are among the most uniform and early-flowering lobelia available, making them a reliable choice for spring flat programs and retail bedding plant sales.
- Lobelia Palace Sky Blue 1,000 Multi Pelleted Seeds — Bright sky-blue flowers on tidy, uniform mounds. One of the most popular lobelia varieties for spring bedding programs and retail flat sales.
- Lobelia Crystal Palace 1,000 MP Seeds — A classic dark blue variety with bronze-green foliage. Crystal Palace is a proven performer with excellent uniformity and strong retail appeal.
For smaller pack sizes and home gardener quantities, visit www.trailingpetunia.com.
Lobelia Series Comparison: Which Is Right for Your Program?
| Series | Habit | Best Use | Heat Tolerance | Key Strength |
|---|---|---|---|---|
| Starship | Upright | Containers, borders, mixed planters | High | Bold flowers, heat performance |
| Regatta | Trailing | Hanging baskets, window boxes | Medium-High | Cascade habit, continuous bloom |
| Palace | Mounding | Bedding flats, 4" pots, edging | Medium | Uniformity, early flowering |
| Riviera | Trailing/Mounding | Mixed baskets, edging | Medium | Color range, compact habit |
| Crystal Palace | Mounding | Bedding, borders | Medium | Classic variety, bronze foliage |
How to Grow Lobelia from Bulk Seed: A Commercial Production Guide
Germination
Lobelia seed is extremely fine — even pelleted, it requires careful handling. Follow these steps for reliable germination in a commercial setting:
- Sow on the surface — do not cover pelleted lobelia seed. Light is required for germination.
- Temperature: 70–75°F (21–24°C) soil temperature for optimal germination.
- Germination time: 10–21 days. Pelleted seed may take slightly longer as the coating dissolves.
- Moisture: Keep the medium consistently moist but not waterlogged. Mist gently to avoid displacing seeds.
- Light: Provide supplemental lighting (16-hour photoperiod) in early spring to accelerate germination and early growth.
Transplanting & Growing On
- Transplant to final containers when seedlings have 2–3 true leaves, typically 4–6 weeks after sowing.
- Grow on at 60–65°F (15–18°C) nights for compact, well-branched plants.
- Pinch or shear young plants once to encourage branching, especially for mounding types.
- Fertilize with a balanced 20-10-20 at 150–200 ppm nitrogen; reduce nitrogen as plants approach bloom to encourage flower set.
Production Schedule
- Spring sales (April–May): Sow 12–14 weeks before desired sale date (January–February).
- Mother's Day peak: Sow in early January for May 10–12 target.
- Summer basket programs: Sow March–April for June–July sales.
- Fall programs: Lobelia performs best in cool weather; plan for September–October sales in USDA zones 7–9.
Common Issues & Solutions
- Damping off: Ensure excellent air circulation and avoid overwatering at the seedling stage. Use a well-draining germination medium.
- Slow germination: Check soil temperature — below 65°F significantly slows germination. Use bottom heat mats.
- Leggy seedlings: Increase light intensity and reduce temperature. Supplemental lighting is strongly recommended for winter sowing.
- Summer decline: Lobelia naturally slows in peak summer heat. Shear plants back by one-third and they will rebloom as temperatures cool.
Lobelia for Farmers Markets & Retail Programs
Lobelia is a consistent top-seller at farmers markets and garden centers for several reasons: the color range is unmatched in the cool-season annual category, the plants are compact and easy to transport, and customers recognize and trust the variety. Here's how to maximize your lobelia program for retail:
- Lead with blue: Blue lobelia (Starship Blue, Palace Sky Blue, Crystal Palace) consistently outsells other colors. Stock 40–50% blue in your program.
- Offer trailing and mounding: Customers buying hanging baskets want trailing types; bedding plant buyers want mounding. Stock both.
- Bundle with complementary annuals: Lobelia pairs naturally with white alyssum, yellow calibrachoa, and pink petunias. Pre-made mixed baskets featuring lobelia command premium pricing.
- Label clearly by series: Customers who've grown Regatta or Starship before will return for the same variety. Clear labeling builds repeat business.
Related Reading
- The Blue Cascade: Designing With Lobelia Seeds for Hanging Baskets and Edging
- Cool-Weather Color and Sun-Kissed Texture: Planting Lobelia and Strawflowers from Seed
Frequently Asked Questions: Bulk Lobelia Seeds
What is the difference between trailing and mounding lobelia?
Trailing lobelia (like the Regatta series) produces long, cascading stems that spill over the edges of hanging baskets and window boxes. Mounding lobelia (like Palace and Crystal Palace) forms compact, rounded plants ideal for bedding flats, 4-inch pots, and landscape edging. Upright types like Starship fall between the two — they grow more vertically and are well-suited to mixed containers and border use.
How many lobelia seeds do I need per flat or basket?
For 288-cell plug trays, sow 1–2 pelleted seeds per cell. For 128-cell trays, 1 seed per cell is standard. For hanging baskets, plan on 3–5 plants per 10-inch basket depending on the trailing habit of the variety. At 1,000 seeds per pack, a single pack of pelleted lobelia seed will fill multiple 288-cell trays.
Do lobelia seeds need light to germinate?
Yes. Lobelia seed requires light for germination — do not cover seeds with growing medium. Surface-sow pelleted seeds and mist gently to keep them moist. Maintain a soil temperature of 70–75°F and provide supplemental lighting for best results, especially when sowing in winter months.
How long does it take lobelia to bloom from seed?
Lobelia typically takes 12–16 weeks from sowing to first bloom under commercial greenhouse conditions with supplemental lighting. Without supplemental light, add 2–4 weeks to your schedule. Pelleted seed may add a few days to germination time as the coating dissolves, but overall crop time is comparable to raw seed.
Is lobelia heat tolerant?
Lobelia is a cool-season annual that performs best in temperatures between 55–75°F. It will slow or stop blooming in peak summer heat (above 85°F). However, the Starship and Regatta series have been bred for improved heat tolerance compared to older varieties. Shearing plants back by one-third during heat stress will encourage a strong rebloom when temperatures cool in late summer and fall.
Can I grow lobelia as a cut flower?
Lobelia is not typically grown as a primary cut flower due to its small individual blooms and short stem length. However, upright varieties like the Starship series can be used as filler in mixed bouquets and floral arrangements, adding a pop of intense color. They are best used fresh and have a vase life of 5–7 days when cut at the right stage.
What is the best lobelia variety for hanging baskets?
The Regatta series is the industry benchmark for hanging basket lobelia. Regatta varieties produce long, trailing stems with excellent branching and continuous bloom. The Regatta Mix is a popular choice for growers who want a multi-color basket without managing individual color SKUs.
How do I store bulk lobelia seeds?
Store bulk lobelia seeds in a cool, dry, dark location — ideally at 40–50°F with low humidity. An airtight container in a refrigerator works well for long-term storage. Properly stored pelleted lobelia seed maintains good germination rates for 2–3 years. Always label containers with the variety name and purchase date.
What is the difference between the Riviera, Palace, and Regatta series?
All three are compact to trailing lobelia series, but they differ in habit and best use. Riviera is a trailing-to-mounding type with excellent color range, suited for mixed baskets and edging. Palace is a compact mounding series bred for uniformity in bedding flat programs. Regatta is the most trailing of the three, purpose-built for hanging baskets and window boxes. For most commercial programs, carrying at least one trailing (Regatta) and one mounding (Palace) series covers the full range of customer needs.
Are pelleted lobelia seeds worth it for commercial production?
Absolutely. Lobelia's natural seed is among the finest of any annual crop — nearly dust-like — making it extremely difficult to handle, singulate, and sow accurately at commercial scale. Pelleted seed dramatically improves seeding accuracy, reduces waste, and makes mechanical seeding possible. The slight premium over raw seed is easily justified by improved germination uniformity and reduced labor costs.