Lobelia siphilitica (Blue Cardinal Flower)
This is a really nice plant. Blue cardinal flower, Lobelia siphilitica, is an easily grown, herbaceous perennial, native to eastern North America and hardy to USDA zone 4. It needs fairly moist soil and does better here in part shade, where the ground doesn’t dry out so much, or in full sun in pots where it gets regular watering. It blooms over a fairly long period, which is always appreciated. One thing I didn’t know about it is that the species name of siphilitica is from “a prior medicinal use of the plant in the treatment of venereal disease.”
It does well in our garden and we have it scattered around. This particular plant is growing in a container on the driveway with black-eyed Susans behind it. Blue and yellow is always a good combination in the garden and with yellow being so prominent in ours, adding that touch of blue is great.
Cardinal Flower (Lobelia cardinalis)
I probably should have waited a little longer to take a picture of this, since it isn’t really in full bloom yet. But I only got outside for a little while late this afternoon and this is all I took photos of. Cardinal flower (Lobelia cardinalis), is an American native and well worth growing. It really adds a splash of bright color to the garden. The only thing here is that you need to watch it in our dry summer heat that it doesn’t dry out too much. It likes moist soil and can even tolerate a little brief flooding. If you’re in a place that’s not quite so hot in the summer, you could plant it in full sun but for us, it does better with a bit of shade. This one is growing under a largish cherry tree and it a bit protected from the hot, afternoon sun. If you have a stream or pond, this would be great on the banks of that. Ours will have more flowers in a matter of days but you can already see how red the blooms are and why it’s such a nice thing in the border. We should have more than we do.