That specific deep navy-blue cascade you see in magazine hanging baskets isn’t magic — it’s Regatta Midnight Blue Lobelia, a variety prized for its velvety, dark blooms and tidy trailing habit. The challenge with this seed is its famously tiny granular size, which makes even distribution a genuine test of patience for any gardener.
I’m Mohammad Maruf — the founder and writer behind Gardening Beyond. I’ve spent countless hours digging into seed catalogs, analyzing germination data, and cross-referencing grower feedback on commercial Lobelia strains to write this guide with real depth.
Whether you’re filling baskets for a wedding or adding structure to a border, understanding the specific needs of these seeds is critical. This review of the best regatta midnight blue lobelia seeds breaks down germination strategies, realistic timelines, and why seed size matters more than you think.
How To Choose The Best Regatta Midnight Blue Lobelia Seeds
This is not a “bigger is better” seed purchase. The defining challenge of this specific Lobelia variety is its minute seed size — often described as dust-like. Buyers need to think beyond just seed count and focus on germination infrastructure, packet design, and intended use case.
Seed Count vs. Usable Germination
A packet advertising 250 seeds sounds generous, but the real metric is how many seedlings actually survive to transplant. Pelleted seed coats (which make seeds larger and easier to handle) are rare for Lobelia, so expect raw, uncoated grains. The common beginner mistake is to over-sow, leading to overcrowded plug trays that damp-off before true leaves appear. Target 1-2 seeds per cell in a 128-cell tray if you have a heat mat; double that if you don’t.
Sowing Method — Packet Design Matters
Not all seed packets are created equal. Some offer a tear-off corner that lets you sprinkle seeds in a controlled stream. Others require you to manually pinch and hope. If you’re starting indoors for a specific event — like a wedding centerpiece — you need a packet that doesn’t dump all seeds in one clump. Look for inner foil-laminated packaging that stays dry and a closure that allows precision tapping.
Germination Timeline and Light Requirements
Regatta Midnight Blue is a light-germinating seed. You must surface-sow and never cover with soil. The plug crop time is 4 to 5 weeks from sowing to plug-ready, then another 8 to 10 weeks from transplant to first flower. That’s roughly 12 to 15 weeks from seed to bloom. Buyers planning for a specific date — say early June — need to start seeds by late February or early March indoors under lights.
Quick Comparison
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| Model | Category | Best For | Key Spec | Amazon |
|---|---|---|---|---|
| Park Seed Regatta Midnight Blue Lobelia | Seeds | Hanging baskets, dense color | 250 count, dust-like seed size | Amazon |
| Blue Plumbago (1-Gallon Live Shrub) | Live Plant | Instant landscape impact | 14-16in tall, Zones 9-11 | Amazon |
| Liriope muscari ‘Big Blue’ | Perennial | Low-maintenance ground cover | 8-10in height, Zone 6-8 | Amazon |
| Regatta Women’s Classic | Outerwear | Layering under rain jacket | Lightweight, warm fleece | Amazon |
| Regatta Haber II Womens Bodywarmer | Outerwear | Snug fit, cold weather | Snug cut, machine washable | Amazon |
In‑Depth Reviews
1. Park Seed Regatta Midnight Blue Lobelia
This is the exact seed you came here for. Park Seed’s offering of Regatta Midnight Blue Lobelia comes in a 250-count packet, which sounds abundant until you see the actual grains — they’re almost dust-like. The packet is foil-lined to retain moisture, but the opening design makes precise sowing tricky; you’ll want to mix the seeds with fine sand or vermiculite to get an even sprinkle across your plug tray. The brand is well-known in the specialty seed market, and the genetic line here is true to the deep navy-blues the variety is famous for.
Germination reports from buyers are split: those using heat mats and clear humidity domes saw sprouts in under 10 days, while surface-sowing without bottom heat led to spotty results. The plug crop time is advertised at 4-5 weeks, and most experienced growers confirm that timeline under consistent 70-75°F conditions. The transplant-to-flower window of 8-10 weeks is realistic if you’re potting up into 4-inch containers before moving to final baskets. A few verified buyers reported that seeds failed to bloom entirely, which points to either insufficient light during the plug stage or over-watering that rotted the tiny roots before establishment.
For hanging baskets, aim for 5-7 plants per 12-inch basket for a full cascade effect. The trailing habit is moderate, not as aggressive as wave petunias, so you’ll get a tidy mounded spill rather than a waterfall. This is a top-tier choice for anyone willing to invest in the upfront infrastructure — heat mat, grow light, and bottom-watering trays — to coax these tiny gems into their full potential.
What works
- Rich, velvety navy-blue flowers true to variety
- Foil-lined packet preserves seed viability
- Fast germination with heat mat and humidity dome
What doesn’t
- Extremely tiny seeds make even sowing difficult without mixing medium
- Packet opening dumps seeds in clumps rather than allowing controlled sprinkle
- Some batches showed zero germination under non-ideal conditions
2. Blue Plumbago – 1 Gallon Live Shrub
If you don’t want to wait 12-15 weeks for flowers, this established Blue Plumbago shrub offers immediate gratification. Delivered in a 1-gallon container at 14 to 16 inches tall, it arrives with active blue blooms and a healthy root system. The flowers are a true sky-blue rather than the deep navy of the Lobelia, but they serve a similar purpose: pollinator attraction and long-season color. The listing explicitly states no shipping to California, Hawaii, or Alaska due to agricultural restrictions.
Buyer feedback is overwhelmingly positive for packaging and plant health, with multiple repeat customers praising the grower’s consistency. However, a small but notable share of reviews mention that some plants arrived wilted or dead, particularly when shipped later in the week. This suggests that ordering earlier in the week (Monday or Tuesday) to avoid weekend warehouse holds could improve your odds of receiving a vigorous specimen. The shrub is fast-growing, drought-tolerant once established, and requires only occasional pruning to maintain shape.
This is not a substitute for the trailing Lobelia habit — Plumbago grows upright with a mounding form — but for gardeners in Zones 9-11 who want a deer-resistant, pollinator-magnet shrub with blue blooms, it’s an excellent live alternative to seed-starting. Use it as a backdrop for containers or as a foundation plant where the Lobelia seeds would be the trailing foreground element.
What works
- Large, established plant with blooms at arrival
- Attracts butterflies, hummingbirds, and bees
- Drought-tolerant once roots are established
What doesn’t
- Not shippable to CA, HI, or AK
- Some shipments arrived wilted or dead
- Upright habit — does not trail like Lobelia
3. Liriope muscari ‘Big Blue’ (Lilyturf)
This is a completely different plant — a perennial ground cover, not an annual trailing flower — but it offers the same deep lavender-blue flower spikes in late summer that many gardeners seek as a color companion. The ‘Big Blue’ variety of Liriope muscari matures at 8-10 inches tall with a 15-18 inch spread, making it an excellent edging plant along borders where Lobelia seeds would be too delicate. It arrives fully rooted in a #1 size container, ready for immediate planting.
Customer reviews consistently praise the health of the plants at arrival. Multiple buyers ordered batches of 10+ and reported that replacements for any damaged items were sent promptly and matched the quality of the originals. The plants are low-maintenance, retaining color until frost, and produce purple flower spikes in late summer. The soil type listed is sandy soil, and the USDA range of 6-8 covers a broad swath of the central and eastern US. The growth rate is moderate — expect to see noticeable spread by the second season.
This is not a direct replacement for Lobelia seeds; it’s a smarter purchase if you want a reliable perennial that delivers blue-purple color year after year without annual replanting. Use it as a border foreground beneath taller plants, where its clumping habit provides structure that the delicate Lobelia cannot match. The cost per plant is higher than a seed packet, but the multi-year return makes it a strong value proposition for permanent garden beds.
What works
- Healthy, well-rooted plants in #1 containers
- Reliable lavender spikes in late summer
- Broad hardiness range — Zones 6 through 8
What doesn’t
- Not a trailing plant — clumping form only
- Flower color is lavender, not deep navy blue
- Slower spread than seed-grown annuals
4. Regatta Women’s Classic Navy Fleece
This product is a women’s fleece jacket, not a plant. It appears in the results because the shared “Regatta” brand creates an Amazon storefront overlap. The Regatta Women’s Classic in Navy Blue is a lightweight, warm fleece designed for layering under outer shells. It runs long in the body and has a slim fit, which means you should consider sizing down if you intend to wear it without thick layers beneath, or sizing up if you want room for a t-shirt underneath.
Buyers consistently call it a great-value walking top for spring and autumn. The fleece is not bulky, which makes it comfortable under a rain jacket without adding restriction. A few reviews note that the color selection at checkout can default from a chosen color to navy, so double-check your order confirmation. The fabric holds up well to machine washing, and the zip-front design allows easy temperature regulation during active outdoor work.
For gardeners, this jacket serves a practical purpose: early morning planting sessions or evening watering when temperatures drop. The navy blue color coordinates well with garden gear, and the lightweight build means you won’t overheat while digging. It’s not a shell — it won’t block heavy rain — but as a mid-layer under a waterproof coat, it performs reliably.
What works
- Lightweight and warm without bulk
- Fits well under a rain shell for added insulation
- Machine washable, maintains shape after multiple washes
What doesn’t
- Not a waterproof outer layer — fleece only
- Slim cut may run small for those wanting loose fit
- Color selection can default at checkout without warning
5. Regatta Haber II Womens Bodywarmer
This sleeveless bodywarmer (gilet) is another Regatta-branded apparel item that cross-references in the Lobelia search results. It is a lightweight vest designed to keep your core warm without restricting arm movement — a practical consideration for gardeners who need full range of motion for pruning, planting, and lifting. The fit runs snug, so buyers who prefer a looser cut or plan to layer over thick sweaters should order one size up from their usual measurement.
Customer feedback highlights the good quality of the fabric and the flattering cut, though some European buyers noted that the fit was too boxy for their preference. The vest is machine washable and packs down small, making it easy to stash in a garden cart or tool bag for unexpected temperature drops. The front zipper is sturdy, and the collar stands up to block wind. It’s not insulated with down or synthetic puff — think fleece density rather than puffer jacket warmth.
For dedicated gardeners, this vest fills a specific niche: it keeps your torso warm during early spring sowing or late fall cleanup while leaving your arms free to move. The navy color matches the Regatta Classic fleece, so the two can be layered together for colder days. It is not a rain barrier, but as a mid-weight core warmer, it performs its role without complaint.
What works
- Keeps core warm without restricting arm movement
- Packs small for easy storage in garden bags
- Durable front zipper and wind-blocking collar
What doesn’t
- Fit runs snug — size up for layering
- Not waterproof; fleece absorbs moisture
- Cut may feel boxy for some body types
Hardware & Specs Guide
Seed Size and Sowing Density
Regatta Midnight Blue Lobelia seeds are uncoated and measure roughly 0.5mm in diameter — smaller than a pinhead. This dust-like consistency means standard seed drills or finger-pinching methods often result in clumps. Mixing seeds with fine vermiculite or sand at a 1:10 ratio by volume creates a more even sprinkle across plug trays. For a 128-cell tray, use approximately 50 seeds to account for germination loss and thinning.
Germination Requirements
These seeds require light to germinate — never cover them with soil. Surface-sow on a moist, sterile seed-starting mix under a clear humidity dome. Bottom heat at 70-75°F (21-24°C) reduces germination time from 14-21 days down to 7-10 days. Without a heat mat, germination becomes erratic and may fail entirely in cool environments below 65°F. Use a spray bottle for watering to avoid dislodging the tiny seeds.
Plug-to-Bloom Timeline
The plug crop phase lasts 4-5 weeks from sowing to a transplantable plug with 2-3 true leaves. After potting up to 4-inch containers, the plant requires 8-10 weeks to reach first bloom under 14-16 hours of light per day. Total seed-to-flower cycle is 12-15 weeks. Gardeners targeting a specific event (e.g., a June wedding) should start seeds indoors by late February or early March under grow lights.
Final Spacing for Hanging Baskets
For a full, cascading display in a 12-inch hanging basket, plant 5-7 well-rooted plugs spaced evenly around the basket rim. The trailing habit reaches 10-14 inches in length over the season, creating a mounded spill rather than a curtain effect. In garden borders, space plants 6-8 inches apart for a dense ground-covering carpet. Overcrowding reduces airflow and increases the risk of powdery mildew on the foliage.
FAQ
Why are Regatta Midnight Blue Lobelia seeds so tiny compared to other flower seeds?
Can I direct-sow these seeds outdoors instead of starting indoors?
How do I avoid damping off when starting these seeds in plug trays?
Will Regatta Midnight Blue Lobelia survive winter in colder climates like Zone 5?
How many seeds from a 250-count packet should I expect to actually flower?
Final Thoughts: The Verdict
For most gardeners, the best regatta midnight blue lobelia winner is the Park Seed Regatta Midnight Blue Lobelia because it offers a true-to-variety genetic line with the deep navy color you expect, along with a foil-lined packet that preserves viability through shipping. If you want instant blue flowers without the 12-15 week seed-starting wait, grab the Blue Plumbago live shrub. And for a perennial, low-maintenance blue-purple border plant that returns year after year, nothing beats the Liriope muscari ‘Big Blue’.