Below is our 5 year old clump of Commelina erecta looking absolutely dazzling, as it does each spring and summer. Commelina erecta is an amazing perennial, virtually unknown in horticultural circles, despite being native from 30 of the 50 states (Minnesota to New Mexico). Our collection below is from Elbert County, Georgia.
Each plant forms a 4′ wide mat of fleshy green foliage, highlighted by erect 1′ tall flowering stems. The stems are topped from July through September with rich pure blue flowers (a rarity in the hardy plant world). Although each flower is only open for a day, the succession of blooms rivals most annuals. So, why isnt’ this grown more? In the wild, it’s a fairly sparse plant, since it occurs naturally in the light/open/partial shade. Consequently, most authorities encourage you to plant it in similar conditions. Most references also write about its potential weediness, which raises all kinds of red flags.
In our trials, we have found that it grows and flowers far better in full sun. I can’t imagine why anyone would want to put this in the shade. Although it has legendary drought tolerance, it also grows great in moist soils.
Our selection from Georgia produces very few if any seedlings in the garden, so after 5 years of growing in excellent garden conditions, we see zero signs of weediness. Did I mention that it’s a great food for quails, and doves? Winter hardiness is most likely Zone 4a-9b.
So, the question is—do you think anyone would buy this if we propagated a few?