Interesting you mention this. I was interested in the plant as bee forage since it is an incredible source in coastal Australia, and I live in a similar environment in coastal Portugal. My mother-in-law informed me that a very similar species of Echium used to grow like weeds along the entire coast- until all the locals pulled them out to cultivate their lands. It seemed like a solid decision after that.
R Ranson wrote:If you aren't living in the plants historical range, perhaps you can double check that it won't naturalize in your area and/or push out any beneficial species native to your area. Do they compete with a plant that other species rely on for food?