Further Thoughts on Flowering Containers
Now that we’re heading into the fall season I’m rethinking my preferred plants for next year’s containers. A few conclusions I’ve drawn:
- Big Thumbs Up for Pentas. I was very happy with the Star Flowers (Pentas lanceolata) in my containers for sun. They bloom enthusiastically and can take the heat. Plus, they are great for hummingbirds. In August I regularly came to the front door on my way out and saw hummingbirds on the porch nectaring at the Pentas – they had never appeared on the front porch before this. While the red clusters of small star-shaped flowers are unique when viewed up close, from a distance they look like zonal geranium flowers.
- Orange Cosmos v. Orange ‘Profusion’ Zinnias. Earlier this year I was enthusiastic about my orange cosmos (Cosmos sulphureus), which I used as a filler in containers. However, in late summer the cosmos tended to get ragged and bloom sparsely, no matter how conscientiously I deadheaded. I think next year I would use orange ‘Profusion’ Zinnias instead. I used them in one of my sunny beds, and they are more reliable for flowering throughout the growing season. Even when I don’t deadhead them, they bloom, well, profusely.
- Cannas are Really a Foliage Plant. This is the first year I had more than one Canna, and I realized that this should really be grown as a foliage plant. I wouldn’t go as far as Garden Walk Garden Talk, who removes the flower buds before they bloom. I like Canna flowers, but they are too few and far between to be the main selling point of this plant. The foliage is really something, though, and in the future I will make interesting foliage my first criteria when picking Canna varieties. I’ve found that they do make good container plants, though I haven’t tried the really gigantic ones.
- Prune those Lantanas. My ‘New Gold’ Lantanas did not bloom as freely as I expected this summer. Only after I pruned them back did they start flowering as I had hoped. I conclude that deadheading is not enough, these plants really need to be cut back at least a couple times over the summer.
- Bacopa Has Staying Power. I expected the annual lobelia (Lobelia erinus) to sulk during the summer months and then bounce back in fall. However, this summer’s extreme heat just wiped these guys out. In the future, I’ll be inclined to use Bacopa (Supera cordata) as a trailing plant with blue flowers. It’s not as eye-catching as annual lobelia, but it does have staying power.