Wednesday, August 26, 2020

Plant Profile: Great Blue Lobelia (Lobelia siphilitica L)

Great Blue Lobelia (Lobelia siphilitica L.) is a good plant for attracting pollinators with its brilliant blue-violet flowers in mid-late summer when many other things in the garden are starting to look tired.

Blue Lobelia is a native perennial plant to the eastern half of the United States. It is a woodland plant that prefers part-sun and even moisture. (Do not allow it to fully dry out or it starts to get a bit "crispy" around the leaf edges.) It grows to about 1-3 feet high. It tolerates most any soil type -- heavy clay to sandy.

To propagate it, divide clumps in the spring. It does also re-seed a bit especially in a damp yard, but it is very easy to pull up where you don’t want it.

The white version is just as tough, though I have found it harder to propagate it.

It has no pest problems, is deer-resistant, and tolerates drought. The best part is that it blooms for more than six weeks straight. 

Great Blue Lobelia - You Can Grow That!

The video was produced by Washington Gardener Magazine.

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1 comment:

  1. Blue lobelia is indeed a beautiful color, but in my yard it reseeds a lot, not just a little. Just beware and be vigilant if you do not have a lot of space for it to roam!


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