Posts Tagged Ironweed

For Late-Season Blooms, Think Ironweed

Blooming started getting enthusiastic in late August.

Blooming became enthusiastic in late August.

New York Ironweed (Vernonia noveboracensis) has always been a volunteer wildflower on my floodplain. That’s the native habitat for this passionately purple wildflower. This year when we built a new pollinator flower bed, I had an excuse to plant more ironweed. New York Ironweed tops out between five to eight feet, but I decided to try a taller species to plant behind some of the other flowers I added. I chose Vernonia gigantea ‘Purple Pillar.’

In its first year, Purple Pillar topped out right around five feet.

In its first year, Purple Pillar topped out right around five feet.

Purple Pillar is supposed to reach heights of nine to ten feet, but in its first year for me, it achieved about half that — not bad at all for a late-spring-planted newbie in a new flower bed. I planted two specimens; both bloomed profusely, attracting a wide array of native pollinators, including these:

Ironweed species native to my region of the southeastern US piedmont all bloom in late summer/early fall. Purple Pillars can theoretically bloom through October, but mine shifted to seed production by late September. I’m hoping that next year the plants will be larger and bloom even longer.

Tightly closed flower buds in late June.

Tightly closed flower buds in late June.

I didn’t do any formal record-keeping, but from my photos and my observations, it seemed to me that my ironweeds attracted a wider diversity of insects/arachnids than my enormously floriferous Joe Pye Weeds. Between these two species, I think just about every butterfly in my neighborhood found my new pollinator bed.

Top of Purple Pillars in late August.

Top of Purple Pillars in late August.

Although this wildflower naturally occurs in moist places, it is highly adaptable both in its moisture and light requirements. It will thrive in a typical flower bed. I pampered all my plants in my new pollinator bed with extra water this year, because they were just getting established. Next year, I’m hoping they will grow larger with no additional water from me — unless we are plagued with significant drought, of course. I’m certainly not going to let these beauties die from extreme weather conditions if I can prevent it.

A close view of an ironweed bloom in late August.

A close view of an ironweed bloom in late August.

At a distance or up close, covered in butterflies or standing solo, ironweeds are a native perennial wildflower that every piedmont gardener should grow. If you don’t have this species in your garden yet, plan on adding some next spring. You — and your local pollinators — will be glad you did.

 

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Majestic Ironweed Reigns over Wetlands

Amethyst-colored Ironweed flowers glow in early morning sunlight.

The recent and uncharacteristic (at least for the last few years) August rains in my area have encouraged the local Ironweed (Vernonia noveboracensis) population to new heights of enthusiasm. When we first moved to our patch of NC Piedmont over 20 years ago, I didn’t see any of this common wetland wildflower, so I actually bought a couple of plants to add to the back of a flowerbed, where the height of these late-summer bloomers would not overpower smaller flowers.

Ironweed is perfectly happy in a typical flowerbed, as long as it receives adequate moisture, but it flourishes best in its native habitat — creek edges and floodplains, where its purple flowers contrast beautifully with the many native composites and goldenrods that can make late summer a monotony of yellow.

Of course, after I planted my store-bought plants, I began to spot native volunteers all over the wetter areas of our yard. Clearly, they had been there all along; I had simply overlooked them in the early years.

During drought years, I sometimes see no blooming plants, or at best, one. This year — the dampest we’ve had in a while (though not wet at my house) — Ironweed is blossoming randomly all over the moister portions of the yard.

I like the way the longish lance-shaped leaves don’t overpower the beauty of the flower head (called a corymb by botanists).

When it’s truly happy, it can grow seven feet tall. My wildflower volunteers are more in the 4-5-foot range, which I deem quite respectable, especially given that two-week round of 100+-degree temperatures we endured in July.

The flowers are beloved by pollinators, and the seeds, which botanists call nutlets, are favored by a number of native bird species. I leave my plants wherever they pop up and let them complete their life cycles on their own terms. Inevitably, a few seeds escape the birds and sprout into new plants the next spring. You can also propagate this perennial from stem cuttings taken in June or July.

Even the native asters that come into their own a bit later in the season are not as deep and rich a purple as the flowers of Ironweed. I highly recommend this trouble-free native perennial wildflower for any spots in your yard that can accommodate its height and moderate moisture requirements. Your reward will be amethyst-colored flowers for over a month, abundant butterflies, and happy local seed-eating birds — a wildflower win-win for everyone.

Flower color is even more richly purple when the plant stands in shadows.

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