Lobelia siphilitica

Magnificent true-blue flower spikes growing to almost a metre for large vases and brilliant spires for any flower bed. More
3000 seeds 157019 £1.95 In stock
[?]
Items will be despatched in 5-7 working days.
1 x 9cm plant 511118-1 £4.95 Delivery late March
[?]
When in stock, please allow up to 1 week for delivery.
3 x 9cm plants 511118-3 £12.95 Delivery late March
[?]
When in stock, please allow up to 1 week for delivery.
More Details

Magnificent true-blue flower spikes growing to almost a metre for large vases and brilliant spires for any flower bed.

Genus Lobelia
Group/Species siphilitica
Type Hardy Perennial
Common Name Blue Cardinal Flower
Border Position Middle
Soil Type Acid, Alkaline, Clay, Fertile, Neutral, Sandy
Scent Unscented
Site Full Sun, Part Shade
Moisture Moist but Well-drained
Height 90cm (36in)
Spacing 30cm (12in)
Sowing, Seeds, Planting Surface sow, onto moist well-drained compost. Cold stratify for 2 weeks to help seed overcome its dormancy (approx. 4°C) then move to a warmer position (approx. 15-20°C). Seedlings should emerge within 2-3 weeks.
Care Tips Requires a moist soil in partial shade where summers are cool. Shade will increase the intensity of the flower colour. Do not allow to dry out, water daily in hot weather.
Flowering July - September
Vase Life Sear stem ends in boiling water for 15 seconds.
Harvesting Flower production: 2 months
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
  • Sow Under Cover/Plant Indoors
  • Direct Sow/Plant Outdoors
  • Flowers/Harvest
Advice

We don't currently have additional advice on using / growing this particular product on our website, but if you do have a question that isn't answered on this page then please give us a call on 0345 092 0283 and we'll happily chat through any queries you may have, or email us on plantadvice@sarahraven.com (for advice on all things growing) or info@sarahraven.com for anything else.

Delivery

Plant Delivery - When in stock, please allow up to 1 week for delivery.

Seeds Delivery - Items will be despatched in 5-7 working days.

Click here to find out more information about our delivery rates and times.

Lobelia siphilitica reviews

* * * * - Average based on 25 reviews

* * * * -

Reviewed 21st November 2018 by Sara

This plant diidn't seem to thrive as well as the others I purchased, despite following instructions. Perhaps next year?

* * * * *

Reviewed 16th November 2018 by Janice

The first time I had bought these, once again arrived as perfect plants, carefully packaged and provided a splash of gorgeous blue, with tall spires all through the summer. They are now cut back and mulched, and I am hoping they will last through the winter,

* * - - -

Reviewed 8th November 2018 by Adelle

Have grown these in a semi shaded bed. Plenty of tall greenery, the flowers were pleasant enough- just not much of them. See how they do in their second year.

* * - - -

Reviewed 7th November 2018 by Claire

This grew but did not flower, maybe it will next year

* * * * *

Reviewed 7th November 2018 by Maryanne

Grew well, flowered. Have now cut down for the Winter; but they look healthy enough.

* * - - -

Reviewed 11th October 2018 by Susie

No flowers on this plant although the plant looks healthy

* * * * -

Reviewed 11th October 2018 by Ada

They grew very tall and a lot of the flowers broke. Under their own weight

* * * * *

Reviewed 3rd October 2018 by Carmen

Again bought as 9cm plants but soon grew in size and flowered beautifully this year.

* * - - -

Reviewed 23rd September 2018 by Maria

I received 3 healthy plants but once they had grown the flowers were white and not blue and I was very disappointed so I contacted Customer Service and I received a refund.
I will try again next year for the Lobelia Siphilitica but all in all good plants and service from the company

* * * * *

Reviewed 22nd September 2018 by Patricia

* * * * -

Reviewed 21st September 2018 by Vivian

The web site is easy to use and the plants arrived in good condition, and in the past you have replaced a plant that was a little poorly.

* * * * *

Reviewed 19th September 2018 by Mary

Very good. It did flower this year.

* * * * *

Reviewed 19th September 2018 by Shirley

Good plants with excellent blooms

* * * * -

Reviewed 19th September 2018 by Hilary

* * * * *

Reviewed 19th September 2018 by June

* * - - -

Reviewed 19th September 2018 by Anne

Didn't survive the drought but may be lurking somewhere to appear next year.

* - - - -

Reviewed 19th September 2018 by Sarah

It turned out to have white flowers, not the blue I was hoping for

Reply from the Sarah Raven Team:

"Thank you for your review. We are very sorry to hear that your Lobelia has flowered incorrectly and have refunded you for the plant."

Posted 7th November 2018

* * * * -

Reviewed 19th September 2018 by Julie

Looked pretty in the garden but I should have supported the plant more as it toppled over

* * * * -

Reviewed 19th September 2018 by Lesley

Also long flowering but rather contorted, probably because I didn,t stake them.

* * * * *

Reviewed 13th September 2018 by Beryl

Ideal for really damp spot. Tall inflorescences, relaxed growth and lovely colour.

* * * * -

Reviewed 5th September 2018 by Miss Walker

Sadly the slugs got to them but I have managed to rescue two of them and planted them in pots where they are flowering nicely and an excellent colour.

* * - - -

Reviewed 4th September 2018 by Elizabeth

Okay but not a standout plant. Bees liked it though!

* * * * *

Reviewed 31st August 2018 by Mrs Jones

Very pleased. A good healthy plant

* * - - -

Reviewed 30th August 2018 by Leonie

This disappeared some time after planting. I don't know if it died or was eaten!

* * * * *

Reviewed 29th August 2018 by Mary

Very good strong plants. They have made a lovely show.