Tower of jewels (Echium wildpretii), 2014 edition

One of the things I look forward to the most each spring is seeing Echium wildpretii in bloom. This Canary Island native nicknamed “tower of jewels” has become very popular in Davis, and at this time of year you can spot the towering flower cones all over town.

Last year I tried a hybrid called ‘Mr Happy’ (Echium wildpretii × Echium pininana). It looked quite similar I didn’t find the blue flowers as attractive as as the magenta ones of Echium wildpretii.

This year I have two towers of jewels that are in bloom. Both were seedlings from my 2011 plant that had sprouted in a pot with a Yucca rostrata. The “extrication” described in this post was successful, as you can see below.

It’s interesting to note that while Echium wildpretii is a biennial—i..e. it flowers in its second year, sets seeds and then dies—my two plants took three years to bloom.


December 12, 2013, looking not so hot after a week-long cold snap. It quickly recovered.

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March 15, 2014. The vertical ascent has begun.

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April 1, 2014. In this phase, growth is very rapid.

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LEFT: April 1, 2014    RIGHT: April 10, 2014

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April 10, 2014


April 10, 2014

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April 21, 2014


April 21, 2014


April 21, 2014

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April 21, 2014
Here you can see how the old petals turn dark blue so it looks the plant has two-tone flowers.

Yesterday I took my mother-in-law to the campus of UC Davis to show her a tower of jewels I’d seen in front of the Sciences Lab Building back in February when I photographed the aloes in bloom. On our way there, I spotted these Echium wildpretii in front of Storer Hall:


This little guy is growing in a small crack filled with only a tiny amount of soil and no irrigation


It will bloom next year if all goes well. I’ll check up on it later in the year.


Still in front of Storer Hall, here are four Echium wildpretii in the front…


…and one in the back. This could be a stunning sight next year. I can already see four towers surrounded by these unusual yellow poppies and unidentified blue wildflowers. The cycad in the back is a Dioon edule.

The tower of jewels in front of the Sciences Lab Building did not disappoint.


It’s by far the tallest one I’ve seen this year. My mother-in-law is 5 ft. 4 in. so I guess this specimen is at least 9 ft. tall.

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Taking a closer look, I realized that it’s actually four plants squished together. The other three towers are just 2-3 ft. tall.


Nearby I spotted a one-year old Echium wildpretii growing next to a clump of Aloe perfoliata. Another one to check out next year when it will be of flowering age!



Echium wildpretii is native to the dry slopes of Mount Teide on the island of Tenerife in the Canary Islands. This biennial forms a rosette of fuzzy grayish leaves in its first year before producing a tall inflorescence (up to 10 ft. in its native habitat) densely packed with flowers in its second year. After flowering and setting seed, the plant dies, but it leaves behind thousands of seeds that scatter as the dried up “tower” falls over.

Echium wildpretii prefers a dry and sunny position and demands well-drained soil. It tolerates temperatures down to the low twenties but quickly dies below that, especially if the soil is wet for longer periods of time.



  1. Haven't had luck getting this to bloom in our garden so enjoying yours. Spectacular inflorescence!

  2. Funny you mention it as I've had a couple of these take 3 years to bloom as well, which I'd fine with me as I love the foliage. Great shot of the one growing in a tiny bit of soil in front of Storer Hall. Do you think someone planted it there or was there a nearby plant setting seed?

  3. Alas, we cold-weather gardeners need to limit ourselves to the smaller echium species. Sigh.

  4. Those are so spectacular!!! Fantastic shots too!!! Love that macro. I thought it had two different color of flowers till you told me about the leaves. May have to try and grow another one.


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