Petunias are resilient and beautiful additions to a landscape or hardscape during the warm months of spring through summer since they thrive in temperatures of 40 to 90 degrees Fahrenheit. Petunias continue to thrive when the temperature rises toward 90 F and many plants begin to perish.
Can petunias withstand high temperatures?
Beautiful summer days may be extremely hot, especially in our midwestern region! It might be intimidating to keep your garden from getting burned by the sun. Fortunately, there are lovely annuals that enjoy the heat AND require little care. Here are a handful of our favorite annuals that enjoy the sun.
The ideal approach to decorate your sunny porch or patio with plants that tolerate the heat is with trailing plants. Dichondra Silver Falls is incredibly heat- and drought-resistant and can reach lengths of up to 4 feet. Its silky smooth, shining silver leaf in your hanging baskets or container gardens will have a chill, calming appearance that you’ll appreciate. One of our favorites from Kaw Valley, you can rely on this hardy annual to survive even after several weeks of sweltering core-of-the-earth temps!
Sweet Potato Vine is another of our favorite trailing annuals. They have lovely foliage that can cover at least three to six feet! They are not only resistant to heat and drought, but they are also simple to grow and require little upkeep. You can use these lush vines as a spiller in your favorite container or as a beautiful addition to your landscaping in the areas of your yard that receive plenty of sunlight. They grow more quickly as the temperature rises! If there are deer or rabbits in your neighborhood, you should use Liquid Fence or Deer Off to prevent them from enjoying their favorite morning spread. Because of the neon-chartreuse foliage carpet of the Sweet Potato Vine ‘Marguerite,’ also known as the ’60-Mile-Per-Hour’ landscaping plant, people have been known to rubber-neck while driving past it. If you choose to plant it, make sure the planters are very large to fully appreciate the appearance. View our plant library to learn why we provide so many varieties of chartreuse Ipomoeas, some of which spread less than others, one of which is enormous, and a variety of leaf shapes. Simply look at the tag to see how big each variety grows and choose one that is appropriate for the planting location. They are all equally beautiful and simple to grow.
Sun-loving petunias are a necessity for your summer garden. Petunias are not only heat tolerant, but their vivid flowers also provide your yard the ideal amount of color. The petunia series “Petchoa, SuperCals” is one of our favorites. A rare cross between a petunia and a calibrachoa is known as a petchoa. These plants produce petunia-sized flowers and calibrachoa (also known as “Million Bells”), which has many blossoms. The nicest part is that, unlike Calibrachoas, they don’t care as much about the ph of the soil and will grow well in flower beds or pots with any good soil. These annuals are excellent summer performers and even self-cleaning! Petchoa’s: SuperCal Neon Rose and Violet stand out for its well-branched, enormous, mounding habit, and electric-colored blooms. Once you’ve tried them, you won’t be able to resist not growing them every year. They look fantastic alone or as part of a large mound of heat-tolerant, low-maintenance beauty. Simply fertilize frequently (every one to two weeks) and use Spinosad as a spray to stop budworm from eating all the blossoms.
The “King” of all petunias in the history of the plant kingdom, Supertunia Vista Bubblegum, must be mentioned while talking about petunias. Without a doubt, “Vista Bubblegum” is the best petunia and maybe the best performing annual on the market. It is by far the most vigorous and heavily covered in flowers throughout the season, and it also benefits from being self-cleaning (no deadheading is required). They can withstand intense heat well, and butterflies are attracted to their bubblegum pink blossoms. All other spreading petunias will underperform and outgrow the Proven Winners “Supertunias” in the “Vista” series. With “Vista Bubblegum” in your big hanging baskets or as a spiller in your big container gardens, you’ll enjoy a beautiful, pink light across your patio. A fantastic plant for beds and the landscape as well. For Memorial Day, my sister and I plant “Vista Bubblegum” close to our parents’ grave because not only did they like cultivating the greatest petunias in cold-frames to keep them sturdy, well-branched, and hardy, but also because they only require weekly watering due to their drought tolerance. Knowing that these guys are delighted to be adorning the final resting place of our devoted, hard-working parents, we appreciate being greeted by the lovely mounds of vibrant pink we can see from the entryway. At our greenhouse in Overland Park, we have a particularly impressive collection of this superflower.
Petunias grown in pots benefit from potting soil that drains well, such as our KVG Potting Soil, and need watering only when the top few inches of soil are dry. Spray a generous amount of Captain Jack’s Deadbug Brew once a week beginning in late May, or as soon as you notice tiny holes in your buds or flowers, if you’ve experienced problems with your blooms or buds being nibbled away. At any of our garden centers, you may purchase ready-to-use spray bottles and a wide variety of supertunias. With generous applications of KVG The Good Stuff fertilizer, about every other week, you can maintain these plants healthy all summer long. Even better, incorporate a few of our time-release granules into the ground prior to planting. By doing this, you can put off fertilizing until after it has been consumed, which is about early September. Petunias are heavy feeders, and if you use a brand like ours, it will be much less probable for it to burn and it won’t be as phosphorus-rich as the most popular national brand, which also leaches excess phosphorous into our groundwater. Our time-release and water-soluble fertilizers were created to be the healthiest for our plants and free of the ridiculously excessive amounts of phosphorus seen in green boxed shit. We are grateful to Dr. Stevens from K-State for revealing this harmful national brand.
Filling those bare sunny spaces in your yard with bushy plants is a terrific idea. The magnificent, bushy plant known as “Angelonia, BIG Indigo” is also called as “Summer Snapdragon” and has dark green foliage and heavenly-scented, dark purple flower spikes with a white eye. You can place them in the warmest area of your yard with no worries because they thrive in intense heat. They will function nicely in partial shade as well. By planting them in well-draining soil and watering them when necessary, you can enjoy their stunning, continuous flower spires together with the bees and hummingbirds.
Another one of our faves from Proven Winners is Evolvulus “Blue My Mind.” It boasts stunning, unadulterated deep sky-blue blossoms and enjoys heat! These plants can withstand heat and drought once they are established. These mounded plants are perfect for window boxes, container gardens, and hanging baskets because of their silvery foliage and continuous flowers.
What better way to enjoy the summer heat than in your garden with sun-loving annuals? Supertunias, which are vivid flowers, can provide just the right amount of color to your yard, while Sweet Potato Vine, a lovely spreading plant, can finish off your landscape. Whichever heat-loving annuals you select, these low-maintenance plants will give you more time this summer to kick back and unwind.
Remember that before being sold in our garden centers, all of our Kaw Valley favorites are trial-tested. These annuals, which are simple to grow, are perfect for our region. Find your preferred heat-tolerant annual at any of our garden centers.
How much heat can petunias withstand?
Temperatures between 61 to 80F during the day and 55 to 65F at night are ideal for petunia growth.
Even though Wave petunias can withstand temperatures as low as 35F, they are quickly killed by temperatures below freezing and anything below 40F.
If petunias have been progressively acclimating as autumn temperatures have set in, they may be able to survive a little frost or a coating of snow.
In hot weather, how should petunias be cared for?
How frequently to water petunias in hanging baskets is one of the most frequently requested questions. The solution is straightforward: water when the top inch of the soil feels dry to the touch. During the summer, hanging petunia plants will probably require daily watering, possibly twice a day if there is a lot of heat and/or wind. Water the area thoroughly enough so that the extra water drips through the drain hole. Never let the ground be damp all the time. Your petunia roots are probably going to decay in this kind of wet environment. Water the soil, not the leaves, if at all feasible. Wet leaves may become infected by fungus.
Feeding Petunias
Use a water soluble fertilizer for flowering annuals to feed petunias once a week. Petunias consume a lot of food since they grow quickly and have several blooms. Since I water my basket until the water drops out the drain hole, I like to use a diluted fertilizer solution every day. This kind of watering prevents me from draining away nutrients as much as I would if I were to use regular water.
For petunias to be grown successfully, there must be enough sun. They require at least five to six hours of sunlight, but full sunlight throughout the day will improve their performance. Plants will produce fewer blooms the more shade they receive. Make sure to rotate your flower basket every week if it is hanging from a porch eve so the darker side may get some sunlight.
If you don’t get rid of faded flowers right once, the plant will go to seed and stop blooming early. In addition, the plant will just appear lot prettier.
Can You Prune Your Petunia?
You can, indeed. The tips of each branch are covered in blossoms on petunias. As summer goes on, branches contain an increasing amount of flowerless greenery since they are always growing longer. You must provide them fresh advice on new locations where petunias in hanging baskets can grow additional flowers. In the middle of the summer, when the stems begin to look scraggly and worn out, trim them back by roughly a third to a half. This will revitalize them, and you will soon notice a sudden blooming of new flowers.
Can petunias withstand direct sunlight?
Petunias require at least 5 to 6 hours of adequate sunlight, and they thrive in locations that receive full sun all day.
While soil doesn’t have to be incredibly rich to produce good petunias, it does need to drain well.
It’s always beneficial to condition garden soil with organic matter, such peat moss, compost, or manure.
Use a rototiller or garden fork to incorporate it into the soil 8 to 10 inches deep.
increases the capacity of light, sandy soil to hold moisture and nutrients while also aiding in the opening up of heavy clay soil, which enhances drainage.
Do petunias thrive in the heat of Texas?
Hello Neil I grow petunias in several big pots for my terrace every summer. They usually die, so apparently I’m not watering them properly. They are beginning to wilt now that the light is almost directly overhead. I’ve put a lot of money into them.
You should swap out your plants. Petunias struggle terribly in the Texas heat. You should anticipate to remove them by the time temps regularly rise into the 90s. They should be planted in early March. Petunias from the “Wave” series perform a little bit better, but you’d still be much better off with moss rose, hybrid purslane, trailing lantanas, pentas, purple fountaingrass, copper plant, firebush, sun-tolerant coleus, purple basil, Dahlberg daisy, and even (in perfectly drained soils) the Cora series of periwinkles. There are probably a few more, but any of them will provide much better results than petunias in late spring and early summer in Texas.
Insectivores are what moles are. Their eyes are inside their ear canals, and they lack external ears. They are typically found in cool, damp soils with many of earthworms and grub worms. Moles build clods of earth in the form of volcanoes. They can be contained with traps pushed into low spots in the surface tunnels. The moles attempt to reopen the tunnels, which sets off the traps.
Hello Neil My house is being leaned against by a huge pecan tree. I was told by a tree expert that I needed to have it clipped right away, but I’ve read that summer pruning can cause trees to contract diseases. When does it need to be trimmed?
You must seek the advice of a certified arborist. Ask regardless; the man you spoke with might have those credentials. Pecans can undoubtedly be trimmed now, but take care to do it correctly and slowly to allow the tree to recuperate. The greatest arborist in your area can usually be suggested by your neighborhood nursery. When it comes to summertime plant pruning and the spread of disease, we’re talking about oaks and oak wilt. Your pecan is perfect for you.
Hello Neil Our pine trees have lengthy roots that extend 20 feet or more from their stems. I’ve hit them with my riding mower and wrecked four lawnmower blades; some of them are partially concealed by my healthy St. Augustine. Should I raise the mower or may I pull out a couple of roots at once? I sincerely don’t want to go down that route.
A large shade tree’s roots can be pulled out by one or two, but October is the ideal month. Avoid doing it as we approach the summer.
Hello Neil In its second year, my St. Augustine has started to grow dark leaf markings that turn tan in the middle. I apply a high-nitrogen (24-5-5) fertilizer to it. What has become of it?
You’ve provided me with a textbook explanation and image of gray leaf spot. Although it is a fungal illness, fungicides are only marginally helpful. The actual problem is nitrogen added in warm weather. Future issues can be resolved by by avoiding nitrogen from early June through early September. I should also point you that cutting St. Augustine requires a height of 4 to 5 inches. It needs to be mowed no shorter than 2 1/2 or 3 inches.
Hello Neil You recently suggested to someone not to plant sycamores as big shade trees. My document was saved, but I later lost it. Which big shade trees were the greatest, once more?
No issue, please. It’s significant enough to reiterate. I’d recommend live oak, Shumard red oak, chinquapin oak, and bur oak for practically all of Texas. Additionally, pecans, cedar elm, and Chinese pistachio. Excellent smaller-sized trees include redbuds, Lacey oaks, Little Gem southern magnolias, and golden raintrees.
Hello Neil Boxwoods have made us unhappy. As a hedge around our front porch, we are thinking of using Burford or miniature Burford hollies. Do these seem promising?
Both are excellent plants, but the height of the porch is the piece missing from my solution (to its floor or rail). Your best option might turn out to be dwarf Burford holly. It reaches heights of 4 to 5 feet and a width of 4 feet. Regular Burford grows to a height of 7 to 8 feet, making it likely too tall. I would advise willowleaf holly if you do require something that tall (also known as needlepoint holly). It has a softer feel and is friendlier to humans.