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Lobelia 'Cambridge Blue' – 200+ Seeds

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🌱 Grown & tested in our Texas garden
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Lobelia Cambridge Blue growing facts

Botanical name	Lobelia erinus 'Cambridge Blue'
Plant type	Annual (tender perennial in zones 10–11)
When to sow	Indoors 10–12 weeks before last frost; warm regions (zones 8–10): set out early spring or fall
Sowing depth	Surface sow; seeds need light
Spacing	4–6 inches
Germination	14–21 days at 70–75°F
Sun	Full sun to partial shade; afternoon shade in warm regions (zones 8–10)
Days to bloom	About 12 weeks from sowing
Height	4–6 inches
Seeds per pack	200+
Shipping	Ships from Texas within 1–2 business days

🌸 Lobelia ‘Cambridge Blue’ (Lobelia erinus)

Grow a cloud of soft sky-blue color with Lobelia ‘Cambridge Blue’, a compact edging lobelia covered in small, light-blue flowers above fine green foliage. Its mounding habit makes it a favorite for borders, window boxes, containers, and hanging baskets, and the flowers attract bees and butterflies.

Key Details:

Botanical Name: Lobelia erinus
Type: Annual (tender perennial in zones 10–11)
Days to Bloom: About 12 weeks from sowing
Plant Height: 4–6 inches
Plant Width: 6–8 inches
Bloom Time: Spring and fall in warm regions; all summer where summers are cool

Growing Information:

Full sun to partial shade; give afternoon shade in hot-summer regions
Rich, moist, well-drained soil
Start seeds indoors 10–12 weeks before the last frost
Surface sow the tiny seeds; they need light to germinate (14–21 days at 70–75°F)
Keep soil evenly moist; lobelia fades in hot, dry weather
Shear plants back lightly after the first flush to encourage more blooms

Note: Lobelia is considered toxic if eaten. Keep away from children and pets.

Lobelia Cambridge Blue FAQ

When should I plant lobelia?

Start indoors 10–12 weeks before last frost and set out after frost. Lobelia fades in summer heat; in warm regions a fall planting also works.

How do I sow such tiny seeds?

Sprinkle them on moist mix and press lightly without covering. Keep moist until sprouted.

Can I grow it in containers?

Yes. It is ideal for pots, window boxes and hanging baskets.

Is it safe for children and pets?

Lobelia is considered toxic if eaten. Keep it away from children and pets that chew plants.

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