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Trailing lobelia   

Lobelia erinus

  • 106 plantings
  • 5 for swap
  • 8 wanted
  • 55 stashed

Trailing lobelia is part of the Lobelia genus and its scientific name is Lobelia erinus.

Trailing lobelia is native to southern Africa, from Malawi and Namibia south to South Africa 1. Popular edging plant in gardens, especially for hanging baskets, edging and window boxes. Long flowering period, from mid spring to early autumn 1. Perennial in subtropical climates 1
Lobelia has masses of blue or purple flowers in a soft mound that trails over edges . Often the foliage is obscured by the quantity of blooms

This variety typically blooms in the following colours:   Blue and   Violet. When mature, blooms are roughly 2.0 cm (that's 0.78 inches in imperial) in diameter.

It is a flower / ornamental that typically grows as an annual/perennial, which is defined as a plant that can matures and completes its lifecycle over the course of one year or more.

Trailing lobelia is known for its prostrate habit and growing to a height of approximately 15.0 cm (5.85 inches). Expect blooming to occur in late spring.

This plant is a great attractor for butterflies and bees, so if you are looking to attract wildlife Trailing lobelia is a great choice.

South Africa is believed to be where Trailing lobelia originates from.

Trailing lobelia is great for inexperienced gardeners and those that like low maintainance gardens.

This plant info is provided by the myfolia gardener's wiki. All details about Trailing lobelia have been kindly provided by our members.

How to grow Trailing lobelia

  • Partial Sun

  • Full Sun

  • High

Naturally bog plants, so need to be kept moist at all times. Does not like hot, dry weather – rejuvenate in midsummer by cutting back by half their height, after the first flush of flowers has faded, which also will help them become bushier. Reapply fertilizer and water them well 2.

Try to plant in a location that enjoys partial sun / full sun and remember to water often. Use Zone 10 - Zone 10 as your guideline for the appropriate climate for this plant. Keep in mind when planting that Trailing lobelia is thought of as half hardy, so remember to protect this plant from frosts and low temperatures.

See our list of companion Plants for Trailing lobelia to see which plants you should plant in close proximity to encourage growth.

Growing Trailing lobelia from seed

Sow in spring or autumn.

Sow seeds as thinly as possible – the finer you sow them, the easier pricking out will be. Lightly press the seeds into the compost/potting medium but do not cover them with soil as they need light to germinate. Place in warmth 15 to 20°C (60 to 70°F), and keep moist at all times 2.
In cooler climates it is also possible to start the seeds inside to get them off to an early flowering. Sow the seeds thinly into pre watered, compost filled trays.Firm in lightly but do not cover with compost. Top the tray with a sheet of glass or perspex or cling film and keep at15 to 20C. Remove the cover when the seeds germinate in 14 to 21 days

Try to aim for a seed spacing of at least 1.95 inches (5.0 cm) and sow at a depth of around 0.08 inches (0.2 cm). Soil temperature should be kept higher than 15°C / 59°F to ensure good germination.

By our calculations*, you should look at sowing Trailing lobelia about 105 days before your last frost date .

Transplanting Trailing lobelia

When large enough to handle (usually after 5 to 6 weeks) transplant 5cm (2in) apart into trays of potting compost. It is easier to transplant little clumps of Lobelia seedlings than to try to transplant single seedlings 2. Keep the seedlings in a light, but cool, position, but shade from bright sun.
When all danger of frost has past, harden off the plants
Plant at 15 cm apart in final position, as the plants will spread 3.

Ensure that temperatures are mild (minimum night temperatures should be around 10°C / 50°F) and all chance of frost has passed before planting out, as Trailing lobelia is a half hardy plant.

Seed Saving Trailing lobelia

Do not allow annuals to run to seed, as this will reduce the time that the plant will remain in flower

How long does Trailing lobelia take to grow?

These estimates for how long Trailing lobelia takes to sprout, grow and harvest are from real observations from real gardeners, right around the world.

Start logging and journaling your observations to participate!

Days to Germination How long does it take Trailing lobelia to germinate?
12 days

Average 12 days | Min 6 days | Max 39 days (9)

Days to Transplant How long until I can plant out Trailing lobelia?
+ 61 days

Average 61 days | Min 43 days | Max 80 days (3)

Days to Maturity How long until Trailing lobelia is ready for harvest / bloom?
+ 90 days

Average 90 days | Min days | Max days (0)

Total Growing Days How long does it take to grow Trailing lobelia?
= 163 days

When should I plant Trailing lobelia?

Our when to plant Trailing lobelia estimates are relative to your last frost date.

Enter your frost dates and we'll calculate your sowing and planting dates for you!

When to sow The number of days to sow Trailing lobelia before or after your last frost date.
105 days before Last Frost Date

Other names for Trailing lobelia


Lobelia erinus L.

Latest Trailing lobelia Reviews

  • At the time I bought Petunia plugs I also bought Lobelia ‘Crystal Palace’ plugs. That was the name on the label but they turned out not to be trailing but bush ones. It didn’t say on the label but I was glad they were bush ones.They flowered non-stop all

    5 stars

    Amarylis about growing Trailing lobelia 'Crystal Palace'
  • My lobelia crystal palace is growing good in a container and is cascading over the sides of it.

    5 stars

    Kevalsha about growing Lobelia Crystal Palace

See all Trailing lobelia reviews and experiences »


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