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Plants That Thrive in Wet or Moist Places
- The drumstick primrose (Primula denticulata) blooms in early spring in hues of blue to red or white. Then comes P. kisoana that spreads by root in either wet or dry places. Last, starting now, there is the candelabra primrose (P. japonica) which sets out a series of blossoms on an increasingly tall stem over a month of bloom-time. All love growing under old apple trees in dappled shade.
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Thalia with Forget-Me-Nots
Forget-Me-Nots (Myosotis sylvatica). I have these blooming now by the hundred everywhere I look, sun or shade. These lovely low-growing blue (or sometimes pink or white) flowers self-sow bountifully. They prefer rich moist soil and will do well in sun or shade. Because they come back from seeds so easily we let them bloom, then often pull them out like weeds to plant something else.
- ‘Thalia’ daffodil. Most bulbs require good drainage, but ‘Thalia’ does fine in soggy soil. She is nearly white, and each bulb can produce three flowers at once. She blooms with the forget-me-nots. Order now for fall planting.
- Globeflower (Trollius spp.). An early summer bloomer, it does best in part sun and moist soil, but will also grow in ordinary garden soil and in full shade. The blossoms are an inch or so across, and bright yellow. Blooms in late May to June, but may sometimes re-bloom in the fall.
- Japanese iris (Iris ensata). These beauties will bloom in standing water, or in damp soil. They are like the Siberian iris, but their falls (petals) lay back almost flat. Blues and purples. Early summer.
- Cardinal flower (Lobelia cardinalis). These flowers are native plants the bloom on 3-foot stalks in fire engine red! I’ve seen them growing on the banks of the Connecticut River, but do well in moist soil and full sun in my garden. Will tolerate some dryness, but prefer wet. I avoid modern hybrids which are other colors, but not as hardy.
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Pollinators are attracted to Swamp milkweed by color and scent
Swamp milkweed (Asclepias incarnata). Related to ordinary milkweed, this likes moist soil and full sun. Unlike the wild one, this does not send runners out and spread by root. Mine get 3- to 5-feet tall, and come in pink or white. Readily available at garden centers.
- These flowers come in red, pink and white and various heights. They can survive in drier soil in shade, but really love moist, rich soil and full sun. good cut flower with an almost woody stem.
- Goldenrod (Solidago spp.). There are many species, some of which spread by root, others do not. It is the very best perennial for supporting pollinators. Mid-summer to fall. ‘Fireworks’ is my favorite.
- Joe Pye Weed (Eutrochium purpureum). This is a native plant that thrives on stream beds and swampy areas that has bee domesticated. A cultivar known as ‘Gateway’ is the best, but gets to be over 6-feete tall. ‘Baby Joe’ is supposed to be a smaller version, but I haven’t tried it yet. Pollinators love this plant which blooms in fall with pinky-purple blossoms.
- Turtlehead (Chelone lyonii). Gorgeous tall stems loaded with pink flowers shaped like helmets – or turtle heads. Will do sun or shade, loves moisture but will grow in ordinary gardens, too. Bumblebees force themselves inside, and seem to growl in there at times. Great cut flower. Fall.
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Henry Eiler rudbeckia does well in a moist, sunny location
‘Henry Eiler’ Rudbeckia. One of the latest flowers I grow. Petals are distinctive: they have space between each one, like missing teeth. Tall, often 6-feet or more. Needs to be staked early, or perhaps cut back in early June to reduce height. Blooms past frost. Full sun, rich moist soil.
Fall Color in the Flower Garden
Big yellow buses are growling as they lumber down country roads, delivering their children to school. Soft serve stands are warning of imminent closure. Favorite flowers are finishing their blooms. Sigh. Fall is here. But don’t despair: there are plenty of colorful plants to fill vases and warm our hearts. Let’s look at a few I like.
Henry Eiler Rudbeckia blooming in October
Most of us have black-eyed Susans (Rudbeckia spp.) of some sort blooming now, either wild or planted. ‘Goldsturm’ is one of end most common, a nice one that has branched stems loaded with blossoms. But do you know one called ‘Henry Eiler’? It is much taller, and has narrow petals spaced out around the blossom, giving it an airy look. For me it blooms well into October. I have a big clump several years old, and need to tie it to keep the 5- or 6-foot stems from flopping. ‘Prairie Sun’ is wonderful one with a green eye that blooms consistently from July to after Halloween.
Turtlehead
Turtlehead (Chelone lyonii) is one of my favorite fall bloomers. Each stem has numerous pink helmet-shaped blossoms an inch long that resemble, well, a turtle head. I love it in part, because it attracts bumblebees that force their way into the blossoms and disappear. I can hear them buzzing inside the blooms.
It does best in rich soil that is consistently moist to wet, but will grow in less desirable soil. I recently saw it on the Maine coast growing in hot, dry sandy soil, though it was much shorter than the 4-to5-foot stems I have. I grow it in full sun and also light shade, and each year the clumps get bigger. I never have trouble with it flopping, but have read that can be a problem in shady locations.
Joe Pye Weed (Eutrochium purpureum) is a native wildflower that appears alongside streams and in wet places. It can be grown in average garden soil, but if it is a dry location, some shade will help it. The small flowers are a pinky purple arranged in panicles that are about 6-inches across. The stems, a dark purple to almost black, contrast nicely with the deep green leaves.
Joe Pye weed Gateway blooms longer and better than the wild forms
Joe Pye weed is a big plant that requires lots of space. I have one clump that is now more than 8 feet tall, though 6 feet in average garden soil is more the norm. ‘Gateway’ is the best of the named cultivars, I think, but I have heard that a smaller variety called ‘Baby Joe’ is only 3 to 4 feet tall and 2 to 3 feet wide. I’m looking for one to try, as Gateway is too big for most beds. Moving a mature clump is almost impossible without a back hoe – or dynamite. I did it once, and won’t again.
When find a flower I like, I collect other species of the same genus. So it is with the burnets. First I planted Canadian burnet (Sanguisorba canadensis), our native species that grows by streams and wet places. It has white bottle-brush flowers on stems 4- to 6-feet tall in a wet area near my stream. It will bloom well into November.
Burnet makes a good cut flower
Other burnets that I grow vary from a 6-inch tight cluster of variegated leaves and tiny burgundy blossoms to 6-foot tall plants with deep burgundy bottle-brush blossoms. Sanguisorba obtusa and S. stipulata are two of the species I grow, though the plant tags are long gone, so I’m not sure which is which. The foliage for most of the summer is very nice. I grow burnets in sun and rich garden soil.
Blooming now, obedient plant (Physostegia virginiana) is one of the least obedient plants I have grown. I have banished it to the edge of the woods in areas that would otherwise be just weeds. The pink or white flower spikes are great cut flowers, but the plant just won’t sit still. Its roots move fast, colonizing and pushing out well behaved plants. And it is tall: 3 to 8 feet!
The variegated form, however, is not a thug. It grows just to 3-feet tall; it does tend to flop, but it blooms later and doesn’t attempt to take over the world. It too, has pink flowers. Worth trying. Mine is yet to bloom this season.
Although I am a little far north to make my Arkansas amsonia (Amsonia hubrechtii) as big and bodacious as it is in places like Pennsylvania, it is still a great plant. Its steely blue flowers in June and July are nice, and the finely cut foliage is good all summer. But in the fall it excels: its leaves turn a lovely yellow that would make the plant worth growing, even without any flowers. Mine now stands nearly 3 feet tall and wide, and it gets even bigger in warmer locations.
Lastly I have to tip my hat to all those wonderful hydrangeas. Hybridizers have developed so many different named cultivars that I can’t keep track of them all. I’m not talking about the blue one, mysteriously called ‘Endless Summer’ which should be ‘Endless Disappointment’. It often fails to perform well after year one.
The classic PeeGee hydrangea has big white clumps of flowers that, if cut now, will look good in a dry vase all winter. And I love the pink ones like ‘Pinky Winky’ and ‘Pink Diamond’ (my personal favorite). ‘Limelight’ is a white blossom with green overtones, another great one.
So go to your local, family-run garden center and ask what they have that blooms now, and until late fall. Your garden doesn’t have to be dull now.
Next June I hope to help lead a Viking River trip down the Seine from Paris to Normandy. Interested? Just e-mail me at henry.homeyer@comcast.net. I’ll be giving garden talks in the evenings, and we’ll see Monet’s garden along the way.
Rambunctious Plants
“Some people are always grumbling because roses have thorns; I am thankful that thorns have roses.” That quote is from French journalist, novelist and critic Jean-Baptiste Alphonse Karr, who lived from 1808 to 1890.
He’s right of course, being thankful for the good attributes of flowers is important even though some also have some problematic traits. It would be easy to ban every flower that misbehaves. On this cold March day I can think of several problem-child flowers that I love.
Obedient Plant
Obedient Flower (Physostegia virginiana) certainly does not live up to its name: it is not at all well-behaved. I started growing it in a sunny spot with rich, moist soil. It grew to be 3 to 6 feet tall with square stems and lovely pink flowers in mid-July. But soon it wandered, taking over walkways and neighboring beds. It got into my rhubarb patch. It spread by root, and even a fragment left in the soil would come back.
Ultimately I hired a diligent young man who spent 10 hours or more just digging it out. “Take no prisoners,” I said. He did a good job by loosening the soil deeply with a garden fork, and then carefully teasing out the roots with a CobraHead weeder. The CobraHead is a single-tined hand tool that is fabulous for getting out roots.
Of course, given the beauty of the flowers and the fact that they have great vase-life, I had to re-plant a few of these non-obedient flowers. Where? Along the edges of a field that is partially shaded by willows, in an area with goldenrod and other tall, aggressive plants. I didn’t want to make life too easy for these beauties, and that worked. I can go pick stems for arrangements, and if the flowers want to spread I can mow them.
Campanula glomerata
Another vigorous spreader is the Clustered Bellflower (Campanula glomerata). This is a lovely globe-shaped cluster of blossoms that are a bluish-purple on stems about 18 inches tall. Like obedient plant, it spreads by root and can be invasive if planted in full sun with rich moist soil. It showed up in my garden without ever being purchased. Some scrap of root must have come in with another flower, perhaps a gift plant.
But Clustered Bellflower is much easier to control than Obedient Plant. It digs easily, and I found that by putting it in drier, shadier locations made it a very nice addition to the garden.
Joe Pye Weed
Joe Pye Weed (Eupatorium purpureum) is a native wildflower that grows alongside my brook, flowering in August. I like the flowers even though they don’t last long in a vase. It’s great food for bees and butterflies. It can reach 6 feet or more tall and has many small pink-purple flowers growing in clusters. A related species, E. maculatum, is said to be a bit shorter and tidier, especially a named cultivar, ‘Gateway’. I bought Gateway and liked it – for several years. Then, like many of us, it spread in middle age. A tidy 2-foot wide plant became a messy 5-foot wide plant, tall and floppy. It had to go.
Digging up my Joe Pye was a real test of my mettle. No helper available, I went at it with a shovel and fork. It didn’t even wiggle. So I cut off all stems and went at the roots with a pick-ax. Three hours later I had removed the roots. Later I learned about a cultivar called ‘Little Joe’ of a related species, E. dubium. This one, I read, is a really nice size, maybe two feet tall and wide. But elsewhere I see it listed as 3 to 4 feet tall. Hmm. I need to be wary about these flowers. But I bet if I see one for sale, I’ll try it. Silly me.
Once I decided to try planting a true bamboo plant. I had been warned that bamboo can take over a garden, spreading by root. So to prevent that, I planted the bamboo in a 50-gallon plastic drum. First I drilled drainage holes in the bottom and buried it, leaving a 3 inch lip above the soil line. I filled it with great soil and compost. Silly me. The bamboo barely survived the first winter, and eventually succumbed. But better safe than sorry.
There are many plants that have been introduced to the United States with good intentions (or by mistake), only to turn invasive. Purple loosestrife is one, Japanese Knotweed is another. Neither is controlled by any native American insect pests and they spread like wildfire. Both have root systems that are daunting, and a mature purple loosestrife plant, I have read, can produce a million seeds or more. And those seeds last for years.
Fortunately, purple loosestrife, which can take over marshes and wet areas, is now being controlled by a beetle imported from Europe where the loosestrife comes from. The beetle was tested before being released and it was found to be species specific: it won’t eat your peonies or your tomatoes.
So what have I learned from my experiences? Don’t give rambunctious plants what they want. Give them less sun, less water and poor soil. Those are better places for overly enthusiastic plants. But also enjoy what they have to offer – and don’t focus on the thorns.
Reach Henry at P.O. Box 364, Cornish Flat, NH 03746 or henry.homeyer@comcast.net. Read his twice-weekly blog with lots of photos at https://dailyuv.com/gardeningg