Problem plants

Physostegia virginiana, obedient plant.

In my garden, there are four or five real problem plants. I have other interlopers, but the following natives and non-natives are really bad actors in my leaf-mold enriched soil. Note: most natives can be kept in check if you don’t water much and have lean, sandy soil. My garden’s natural soil is red sand with large pockets of clay. Over the years, I’ve enriched it with Back to Nature cotton burr compost, my own homemade compost and shredded leaves along with various wood bark mulches. My current favorite is shredded pine bark, but it can sometimes be hard to find.

Our first problem child, ‘er plant, is Verbesina alternifolia, commonly known as wingstem and yellow ironweed. When it blooms in summer, it is beautiful, and pollinators adore it. I do not. This native absolutely loves my garden and all of its resident plants…to death. I’ve ripped and pulled and done everything to get rid of it. Yet, this year, especially, with all of the rain we’ve had, it is trying to take over the lower left bed near my Japanese maple. I will be out there again today trying to convince it to live elsewhere. Why is it such a problem? It has rhizomatous (underground) stems that spread like those of mint. It also spreads by seed. It’s become an utter nuisance in my garden. It’s also a native plant that is great where it has room to spread. My garden is not that place.

Early garden mistakes often linger. Autumn clematis, oh autumn clematis, why ever did I plant you? I remember my friend, Katie, looking at the feverish growth of its first year and remarking it might be a future problem. I should have listened. It is a huge problem plant in the garden popping up everywhere. I get it killed in one spot, turn around, and there’s a stem taking off in another. I hate this plant even though wasps adore it. It also smells good in late summer and is a fall bloomer.

Brennan has been replacing split-rail fence around the back garden. Volunteer autumn clematis grows on a portion needing attention. He asked me if he could kill it. I laughed, and said, “Go ahead and try.”

Another early garden mistake I made was planting garlic chives. I bought them at a small herb show and plunked them into the soil. Well, I am now constantly digging them out. You may think my garden looks good, but I spy with my little eye problem plants galore.

Trust me, even mint, the planting mistake of so many young gardeners is nothing compared to garlic chives. Their roots are six inches deep at least. They bury these tenacious roots into the pockets of clay which hold them like cement. It’s almost awe-inspiring.

Lonicera japonica, Japanese honeysuckle, a terribly invasive vine. I beg you. Don't plant this problem plant
Lonicera japonica, Japanese honeysuckle, a terribly invasive vine. I beg you. Don’t plant this.

Japanese honeysuckle, Lonicera japonica. No, I did not plant this beastly plant. Bill loved his mother’s lovely smelling honeysuckle and planted a small sprig before he and I married. We’ve been married 28 years this May 12, and I am still trying to eradicate it. I’ve done nearly everything you can do to it including burning. Yes, burning. No, it’s still alive. I ripped out a ton of it this morning in fact. Not even brush killer will completely eradicate it. It only sets it back a season or so.

I really think it's Drummond's aster that is my aster problem. This photo is from 2010, but it spread everywhere.
I really think it’s Drummond’s aster that is my aster problem. This photo is from 2010, but it spread everywhere.

Drummond’s aster, Symphyotrichum drummondii. I bought a small plant many years ago, and today, yet again, I was pulling out pieces of it along with its rhizomatous roots. My problem is that this part of the garden is not dry and xeric. In fact, the soil is somewhat clay-like.. One day, when I am old and too tired, this aster will win the fight, but today is not that day my friends.

Mountain mint and our house.
Mountain mint and our house.

Mountain mint. I’m never sure which variety, but I call it common mountain mint. The first clue is the word mint. It and Drummond’s aster duke it out in a corner of the garden, and the battle goes back and forth all season with neither side winning. When I turn my back, they establish détente and begin marching together across the rest of the garden. Only my determination stops full garden domination.

These are my problem plants. Oh, I have more like obedient plant and Johnson grass, but I’ve mostly eradicated them. What are the plants in your garden that give you the most trouble?

 

 

Tropical plants, a hot summer garden’s best friend

Salvia elegens 'Golden Delicious' pineapple sage in front of my red fountain. #nofilter

Next to colorful annuals, tropical plants are a hot summer garden’s best friend. In Oklahoma and much of the middle South, tropical plants are grown successfully as annuals. Yes, in a mid-south climate, they die at winter’s end, but that’s okay. If you take cuttings, you can keep your favorites going year after year. Many of my best plant combos and those in other gardens I’ve seen involve tropicals in some fashion.

A tropical, native plant paradise of variegated tapioca, Salvia greggii 'Pink Preference' and Melinis nerviglumis 'Pink Crystals' or 'Savannah' depending upon where it's purchased.
A tropical, native plant paradise of variegated tapioca, Salvia greggii ‘Pink Preference’ and Melinis nerviglumis ‘Pink Crystals’ or ‘Savannah’ depending upon where it’s purchased.

What price are you willing to play for beauty all summer even when the weather is scorching hot? My garden would be very boring without annuals and tropicals, and you know how much I hate a boring landscape.

In late summer of 2011, the only border that looked good that dreadful summer was the one by the garage planted with tropical plants. Here, variegated oyster plant, 'Peter's Wonder' coleus, alternanthera and heliotrope make a very pretty picture.
In 2011, the only border that looked good that dreadful summer was the one by the garage planted with tropical plants. Here, variegated oyster plant, ‘Peter’s Wonder’ coleus, alternanthera and heliotrope make a very pretty picture.

I was shopping at a nursery last summer, and I had a big, blooming tropical plant in my basket, a Russelia equisetiformis, red firecracker plant. A woman came up to me and began exclaiming over its coral, tubular blooms. Who wouldn’t? It was a beauty. She wanted one, she said. I pointed to the table where they were. She then asked, “Is it perennial?”

Russelia equisetiformis, coral fountain, firecracker plant
Russelia equisetiformis, coral fountain, firecracker plant grows well in garden beds and in pots.

Instead of banging my head against my cart, I smiled and explained it was tropical. She brushed me away with her hand.

“I only buy perennials,” she said. Her garden. Her choice, but gee whiz, how boring.

If you ever see a plant blooming its heart out in a pot, it probably isn’t perennial unless it’s been brought to bloom in a greenhouse. I see perennials blooming out of season in nurseries quite often, and I wish there were signs telling the customers this. It would save a lot of disappointment later. Some perennials bloom all summer, but most have their special season each year even if you deadhead them.

I’m not anti-perennial. I’m just realistic.

In my garden, the story is rarely just about flowers. Coleus, probably 'Redhead', Acalypha wilkesiana - copperleaf plant and Miscanthus sinensis, maiden hair grass tell the story here.
In my garden, the story is rarely just about flowers. Coleus ‘Redhead’ and ‘Alabama Sunset’, Acalypha wilkesiana – copperleaf plant and Miscanthus sinensis, maiden hair grass tell the story here. Only the grass is perennial here.

You purchase tropicals for your patio containers all the time. Buy them for your garden beds too. Many have larger leaves to give them presence in the garden and break up what my friend, Fairegarden, calls “little leaf syndrome.” Or, their foliage is eye-catching because it is colorful. Just look at what breeders have been doing with coleus and elephant ears lately.

Plectranthus scutellarioides 'Indian Summer', coleus in my garden last summer.
Plectranthus scutellarioides ‘Indian Summer’, coleus in my garden last summer.

Others tropicals bloom when nothing else in the garden does much except survive. In the right place, a tropical plant can change your landscape the same way a scarf transforms the blank area around a person’s neck, suddenly making their outfit chic instead of so-so. Plus, scarves keep you warm in the depth of winter.

Coleus Bonefish with 'The Line' coleus and 'Marguerite' sweet potato vine.
‘Bonefish’ coleus, ‘The Line’ coleus and ‘Marguerite’ sweet potato vine frame Mary in this view.

Tropicals, with their hot colors, are also a warm presence in the garden. Some like tropical plumbago can also cool things down by reflecting the summer sky.

Below are some tropical plants I won’t do without in my garden. It’s not an exclusive list. There are so many more available. I profiled some of them in The Bold and the Beautiful. I take cuttings of my tropical plants because, as of 2013, I have a greenhouse. It is a tremendous luxury–I waited years to buy one–but if you have a sunny window, or full spectrum lights, and the desire to overwinter plants, you can take cuttings too. I did this for years. I also take in entire small plants for further propagation during the long winter months. That way, I create a small army for garden balance and flow. I could never buy all of these plants each spring. My garden is large, and repetition is an important design element.

Senorita Rosalita® cleome, spider flower. Senorita Blanca® is a much lighter pink version. It also grows shorter.
Senorita Rosalita® cleome, spider flower. Senorita Blanca® is a much lighter pink version. It also grows shorter.
  • Alternanthera ficoidea ‘Red Threads’ and so many of the other plants in this genus. Wonderful for color in the garden no matter how hot it gets in summer. A. dentata ‘Purple Knight’ is another great one, and it can be started from seed. A. dentata ‘Little Ruby’ is gorgeous. All three perform like champs in hot weather growing to their full size before season’s end.
  • Canna lilies. Many cannas overwinter in Oklahoma, but some, like the Tropicanna® series, are more tropical in nature. If you’re going to grow cannas, grow ones with interesting foliage.
  • Cleome Senorita Rosalita® Other varieties of cleome can be grown from seed. They are great too, but Senorita Rosalita® and Senorita Blanca® were created to have no viable seeds or spurs so they bloom continuously all summer and don’t snag you or your clothes as your work in the garden. Senorita Blanca® blooms a much lighter pink that is almost white and grows more compact.
  • Colocasia esculenta, elephant ears, are some of the most exciting plants for shade because, John J. Cho, Ph.D. a plant pathologist and breeder in Hawaii, spent much of his career working on color, size and form. These were introduced under the Royal Hawaiian Colocasias name. Because of his groundbreaking work, we now have beautiful elephant ears including patented plants: ‘Pineapple Princess‘, ‘Diamond Head‘, ‘Maui Gold‘ and ‘Kona Coffee‘. I would love to grow ‘Pineapple Princess’ and ‘Maui Gold.’ ‘White Lava‘ is interesting too. I’ve linked to Plant Delights Nursery which sells many of Cho’s plants. I grow ‘Black Coral’ which I bought at Bustani Plant Farm. Note that many of Cho’s selections can be grown in sun or partial sun in many climates.
'Maui Gold' elephant ear with red begonias at the Atlanta Botanical Gardens
‘Maui Gold’ elephant ear with red begonias at the Atlanta Botanical Gardens
  • Crossandra infundibuliformis ‘Orange Marmalade’, firecracker flower. I guess it does look like soft orange firecrackers at the top of short stems. Maybe, more like sparklers.
Crossandra nilotica is one plant I'll be adding to next year's repertoire. This is also from Bustani and blooming in full sun.
Orange crossandra at Bustani Plant Farm.
  • Cuphea llavea, bat-face cuphea, is one of the best plants in front of a container or at the edge of a planting bed. I really love the red one–so cute–but there’s also a double purple called Lanai Royal Purple, a double bi-colored one and another one called ‘Ballistic’ that I’ve grown. There are even more cupheas, but I like these best so far.
Cuphea lluvea, bat-face cuphea
Cuphea lluvea, bat-face cuphea
  • Duranta erecta. While duranta is a shrub or tree in tropical climates, in a colder climate, it makes a long-blooming and shorter plant. Some duranta have purple blooms. Others are grown for their foliage. ‘Sweet Memories’ has a purple and white bicolor bloom. I have one in a pot that trained as a standard.
'Haight 'Ashbury' hibiscus is a current favorite of mine. With pink or red flowers blooming in front of it, it's a show stopper.
‘Haight ‘Ashbury’ hibiscus is a current favorite of mine. With pink or red flowers blooming in front of it, it’s a show stopper.
  • Hibiscus acetosella ‘Haight Ashbury’. There are many other cultivars, but I think the variegation on this one’s leaves makes it interesting. I had to buy my plants in Texas. Why does Texas get more diverse plants than we do? ‘Mahogany’ can be grown from seed. I also grew ‘Maple Sugar’ in 2012 and 2013, but I no longer see it in the trade. Maybe they renamed it? I don’t know.
One more from Bustani Plant Farm.
Justicia betonica, white shrimp plant with ‘Alabama Sunset’ coleus. Photo taken at Bustani Plant Farm.
  • Justicia betonica, white shrimp plant.
Lantana camara 'Dallas Red' next to 'Pink Crystals' fountain grass which bloomed earlier.
Lantana camara ‘Dallas Red’ next to ‘Pink Crystals’ fountain grass which bloomed earlier.
  • Lantana camara ‘Dallas Red.’ Are people tired of lantanas? The market was flooded with them a few years ago. Well, I’m one who still likes them in the right place. My potager (kitchen garden) is colored concrete bricks with brick pavers around a red fountain. All that hardscape, along with the asphalt drive next to it makes for one hot space around the fountain. I use a combination of plants to play off the red, and ‘Dallas Red’ is one of them. The plant list changes from year-to-year depending upon my mood. Lantana is a butterfly magnet.
This photo is from September of last year. I didn't grow variegated tapioca this year, and I missed its large presence in the garden. There really isn't anything quite like it.
This photo is from September of last year. I didn’t grow variegated tapioca this year, and I missed its large presence in the garden. There really isn’t anything quite like it. By the way, not to make you sad or anything, but both of those roses are gone now. I planted two Lagerstroemia ‘PIILAG-V’ Enduring Summer Red™ crapemyrtles instead.
  • Manihot esculenta ‘Variegata’, variegated tapioca, has all the best features in a tropical plant. I have to buy this one every year. It’s not cheap, but it’s hard to replicate so I understand. Nothing has the presence that this tropical does.
  • Musa sumatrana, red banana trees. M. sumatrana ‘Rojo’ is a pretty red and green one. Either dig them up and overwinter them in a cool, but not cold place, or grow them all winter in a greenhouse. Some bananas are considered sub-tropical, but I haven’t had any luck overwintering them outside. Too many cold days in an Oklahoma winter. Plant Delights has an interesting selection of ornamental banana trees. Believe it or not, I bought the one in the photo below at Home Depot.
Banana tree, coleus and sweet potato vine in a large container.
Banana tree, coleus and sweet potato vine in a large container.
  • Palm trees. I don’t know enough about palm trees to write intelligently of them. I just grow what I like. Here’s a good post on palms that perform well in Oklahoma, including our one native palm, Sabal minor. Alligator Alley is a local source for palms and other tropical plants that perform well in Oklahoma. They also carry reptiles if you’re so inclined. I am not.
Coleus, probably 'Kiwi Fern' with Tecoma hyb. Bells of Fire® esperanza.
Coleus, probably ‘Kiwi Fern’ with Tecoma hyb. Bells of Fire® esperanza.
  • Plectranthus scutellarioides. Coleus had another name change from Solenostemon scutellarioides. What would we do without these fantastic plants no matter what they’re called botanically?
  • Plumbago auriculata, blue or white, but why grow the white when there are so few easy blue flowers?
Pennisetum purpureum 'Princess Caroline' grass with Senorita Rosalita cleome.
Pennisetum purpureum ‘Princess Caroline’ grass with Senorita Rosalita cleome.
  • Pennisetum purpureum ‘Princess Caroline’ purple fountain grass, or one of the other varieties. It will grow from a plug to a giant mound in a few months. You don’t want it perennial, trust me. ‘Fireworks’ is smaller in stature and in leaf. ‘Princess Molly’ is green and purple and also quite large. ‘Prince’ is huge, and I’ve seen Vertigo® sold around town, but it’s a bit different because it is a millet. I can’t say how it performs.
Pennisetum 'Pince' with Saliva elegans, pineapple sage.
Pennisetum ‘Pince’ with Saliva elegans, pineapple sage.
  • Ricinus communis, castor bean. I like the red New Zealand type with its dark purple leaves. I grew it from seed last year.
New Zealand castor bean with Helianthus angustifolius, Narrow-leaf Sunflower
New Zealand castor bean with Helianthus angustifolius, Narrow-leaf Sunflower, a perennial.
  • Salvia elegans ‘Golden Delicious.’ If you can find this little jewel–I ordered mine online from somewhere–it is more striking than the standard pineapple sage shown above. I’ve grown it for two years. It makes a nice color echo with the fountain when it blooms in late summer, and the foliage is great throughout the growing season.
Salvia elegens 'Golden Delicious' pineapple sage in front of my red fountain. #nofilter
Salvia elegens ‘Golden Delicious’ pineapple sage in front of my red fountain. No filter, just backlit with beautiful October sunlight.
  • Tecoma stans and various hybrids, esperanza. There are now so many different types to grow other than the standard yellow bells. I like Crimson Flare®, Solar Flare® and Bells of Fire®. All of these grow to different heights and have various bloom shades. Do a little research if you plan to overwinter them. Once again, Texas has more of these for sale than anywhere else I’ve traveled, and you know how much I traveled this year.
  • Vigna caracalla, corkscrew vine, is perennial in a tropical climate, but here, it will die with the first frost. You can start it from seed, but indoors to get a running start. I bought my plant from Bustani Plant Farm.
No perfume like Vigna caracalla, corkscrew vine, a tropical grown as an annual here.
No perfume like Vigna caracalla, corkscrew vine, a tropical grown as an annual here.

Tropical plants don’t ask for much. They appreciate an enriched soil, but will even grow in a lesser circumstances. The soil around the potager’s red fountain was just builder’s sand leftover from laying brick paths and building raised beds. I put compost in it every year since, but it’s still primarily sand, so when I plant, I place a little granular fertilizer in the bottom of each hole. This seems to get things off to a good start.

Goodness, there are so many more. I haven’t even mentioned Iresine herbstii, copperleaf plants, the bulbines or black-leaved skyflower, among othersbut this post is way too long anyway. Just do your garden a favor and add annual and tropical plants to your plan. Later, let me know what you planted and how things went. I’d love to hear about it. Oh, and feel free to Pin any of these images to Pinterest. I don’t mind. Also, share away on other social media if you want. The more we get out the word about garden worthy plants, the better. Have a great weekend!