Modern petunias are believed to have descended from South American natives Petunia axillaris and Petunia violacea. Early breeding efforts by the French botanist Petun led to the discovery of early cultivars in private gardens in Europe by 1850.
Petunias flourish in Arizona, right?
We’ll discuss four stunning flower species that can endure and flourish during the mild winters in Arizona. In other areas of the country, these beautiful blooms are often thought of as summer flowers, but in Scottsdale, where our winters are mild and our sunshine is plentiful, these colorful flowers prefer autumn and winter settings.
Winter flowering is greatly dependent on soil preparation and care during the early phases of planting. Find out which months are best for planting these flowers by reading on.
1. There are seven different color variants of pansies, including blue, purple, orange, yellow, white, red, and pink. Pansies are hardy annuals. Pansies grow 6 to 12 tall and prefer cooler weather and sunlight. Although they are fairly simple to cultivate and edible, they have moderate water requirements.
In the low desert of Arizona, pansies can be planted from October through February. Depending on the weather, they will bloom until April or May. Plant seeds in the summer for winter blossoming or in the late winter for early spring and summer flowering.
2. Traditional Geraniums do well in warm climates and tolerate dryness, but they still need frequent watering for the finest blooming. They provide vibrant leaves in red, purple, pink, orange, yellow, or white variants.
Geraniums can reach heights of 12 to 18 inches. They can be planted in the low desert of Arizona between September and April, and they will bloom until June.
3. Taller, stalked flowers in the purple, red, pink, yellow, and white colors are known as snapdragons. They are extremely low-maintenance flowers that don’t need deadheading, although regular pruning can lengthen their already lengthy bloom times.
They can be planted from October through February for the best blooming season, and they will bloom from November through May.
4. Any species of Petunia will thrive in the Arizona winter, although because to the sporadic overnight frosts we have in December and January, some species may die off. They make excellent transplanted flowers for gardens, larger pots, or hanging baskets, but they can also be produced from seeds (it is recommended to begin indoors when planting seeds).
They have a lovely fragrance smell and need frequent care, although they bloom for around five months. Petunias range from deep violet to yellow and are available in practically every color of the spectrum.
The exterior of any Scottsdale property can be made more charming and beautiful by planting flowers. Visit our Blog if you’re looking for further suggestions for updating and renovating your Scottsdale property. On the website’s home page, you can also sign up to receive our blog postings by email.
When is the best time of year to buy petunias?
One of the most popular summer bedding plants in our region is the petunia, which blooms from mid-summer until the first hard frosts of autumn. Their profusion of flowers fills gardens with wonderful color.
The trailing kinds liven up hanging baskets and flow down the edges of containers, while the compact, bushy varieties are ideal for planting in beds and borders.
Petunia flowers come in a vast array of colors, single and double blooms, smooth or ruffled petals, solid single, striped, veined, or picotee-edged colors, and even fragrance. The issue of ancient petunia types turning to mush in a wet summer has also been eradicated by recent breeding.
Petunias are perennial, despite the fact that the majority of bedding kinds are produced from seed annually as annuals. The perennial trailing varieties, like Surfinias, are cultivated from cuttings or young plants.
Cultivation
Although they will tolerate a little moderate shade during the hot, sunny summers, petunias like to be cultivated in full sun. They thrive on soil that is rich in nutrients, moist but well-drained. To keep moisture in sandy soils that drain very well, add lots of organic matter to the soil, such as garden compost, well-rotted manure, or other soil-improving materials.
Petunia varieties
Grandifloras, which have larger flowers, or multifloras, which have smaller flowers and are more resilient to rain, are the two varieties used as bedding.
The Surfinia, Wave, Tumbelina, Supertunia, and Cascadia series of petunias spread or trail.
Sowing petunias
Petunias can be grown from seeds inside with warmth in cell trays, seed trays, or tiny pots at a temperature of 18 to 24C as an annual or bedding plant (65-75F).
When plants are big enough to handle, prick them out into cell trays or tiny pots and let them continue to grow at a temperature of 50 to 65 degrees Fahrenheit (10 to 15 degrees Celsius) in good light.
Before planting the seedlings outdoors once all danger of frost has passed, gradually acclimate them to outdoor circumstances for 7 to 10 days.
Young petunia seedlings are available from garden centers and mail-order suppliers in the late winter/early spring if you don’t have the resources to grow them from seed.
Planting petunias
Make a good-sized planting hole that can readily fit the rootball. Fork in a layer of organic material, such as compost or planting compost, at the bottom of the hole.
Place the rootball in the planting hole, adjusting the planting depth (except for hardy fuchsias) until the top of the roots is level with the soil surface and the rootball is planted at the same depth as it was growing. Fill the planting hole with the excavated soil after adding more organic matter to it. Put some granular general feed on the soil and thoroughly wet it in. The soil can be kept moist and weeds can be controlled by adding a 5-7.5cm (2-3in) deep mulch of well-rotted garden compost or something similar over the soil. If you have a warm greenhouse, you can plant baskets and containers in the spring, let the plants mature, and then move them outside in late May or early June. You’ll have flowers earlier in the summer if you do this.
How to care for petunias
When there are protracted dry spells in the summer, water the soil frequently to keep it moist. Plants in containers will require routine, possibly daily watering with the intention of maintaining evenly moist compost. But be careful not to overwater, as this may make the plants leggy and produce few blossoms.
To ensure a steady supply of blossoms throughout the summer, feed your plants with a liquid plant food on a regular basis. Up to the first autumnal frosts, a high potash liquid plant feeding will promote more, better blooms.
The show will last longer if faded blooms and any sprouting seed pods are removed. Cut back straggly plants severely before feeding them with a liquid plant food to encourage fresh new growth and an abundance of blossoms.
Fall is the greatest time to dig up and compost bedding petunias that have been harmed by frost.
Overwintering petunias
Trailing perennial kinds can be pruned back severely in the fall, cleaned up by removing any dead or broken growth, and then gently lifted. They should be overwintered in a bright, frost-free location, preferably a greenhouse or cool conservatory, in pots just large enough to hold the rootball and with some fresh potting compost around the sides.
Propagating perennial petunias
Cuttings taken in March or April from plants that overwintered or in August or early September from perennial, trailing kinds can be used to create new plants.
Select young, robust, vigorous stems that aren’t in bloom. Cut back one or two stems at the back of the plants severely to promote vigorous regeneration if you are unable to locate adequate growth. collect clippings 7.5–10 cm (3–4 in) long and positioned immediately below the node or junction of a leaf. In pots of gritted cuttings compost, place five or six cuttings at the base of the lowest leaves after removing the leaves from the lower two-thirds of the stem. Put the pots in a propagator or a plastic bag and set them somewhere with good light—but not in the sun—to root.
In two to three weeks, the cuttings should have taken, at which point they can be potted up separately and continued to grow.
In Phoenix, how long do petunias last?
Marigolds thrive most of the year in Phoenix, where they were originally from, including the majority of the summer. Cover during frosts to extend their growing season. They are also advantageous to plant close to lots of veggies to fend off pests.
When planted with some taller annuals or perennials, impatience thrives in some shade.
Zinnias
Even though many other annuals have stopped blooming, zinnias are still in bloom. They make wonderful summer flowers because they enjoy the sun. They come in a variety of dazzling, striking colors that butterflies find alluring.
Sunflowers
A great annual for youngsters to plant is sunflowers. Within a week, these tall, tough plants begin to grow, and in a few months, they can reach heights of up to 10 feet. Sunflowers come in shorter kinds as well. These blooms are an absolute favorite among our children, and the birds adore collecting the seeds. They can also give other plants the necessary shade.
Pentas
Although pentas are regarded as annuals, they are rather resilient, much like petunias. Cover them to prevent frost. They are a year-round necessity if you want to attract butterflies and hummingbirds.
Petunias
Our petunias last about nine to ten months before needing to be replaced. In this region of the country, they are extremely tough annuals. They are one of our favorite annual flowers to grow in Phoenix as a result.
They start to sag in the middle of the summer. However, they are incredibly beautiful for the majority of the year, and hummingbirds enjoy this flower. This is why we annually plant petunias.
Pansies & Sweet Alyssum
Similar to the Sweet Alyssum, pansies dislike high temperatures and appear to live just a short time in our garden.
The fragile annual Sweet Alyssum doesn’t like extremes of heat or cold. It seems to thrive when shaded by larger plants, but in our yard, it quickly becomes lanky and unsightly.
Violas
Beautiful and dainty, violas Johnny Jump Ups grow well from fall to April. Since they dislike the heat, ours seldom perform well in the summer.
By planting taller plants that offer them more shade, you can prolong the bloom period. Beautiful while it lasts.
You may buy hundreds of different annuals as seeds for the widest variety of flowers. You can buy starter bundles of annuals that are in full bloom if you want immediate enjoyment.
Personally, I find that indoor seedlings work better for the more fragile annuals than outdoor seedlings. However, I’ve never had a difficulty growing sunflowers, cosmos, or zinnias outside from seed.
How are petunias grown for a living?
Petunias grown vigorously vegetatively, which are available in a wide range of sizes and hues, have revolutionized the genus. How can you make sure you’re raising the densely branched, vegetative petunias that the industry adores? with a properly thought-out and deliberate regimen that takes into account their exceptional vitality and substantial feeding requirements. The Cascadia, Doubloon, Littletunia, and Ray series by Danziger offers the following production advice:
Use one plant per pot for 4-inch pots. Within six to eight weeks, rooted cuttings will produce plants that are ready for sale.
Use one to two plants per pot for 6-inch pots. Within eight to ten weeks, the plants will be ready.
Use three to four plants for 10-inch hanging baskets; they will be ready in 10 to 12 weeks.
Two weeks after planting, pinch once. It’s suggested to pinch a second time for baskets. Alternatively to pinching, plants can also be clipped.
After transplant, for the first two to three weeks, keep EC between 1.5 and 1.8 and water and fertilize lightly. Before increasing water and fertilizing, let the roots grow to the side of the container.
For the best results, plants require strong light intensities, ideally direct sunshine. 60,000 lux, or 6,000 foot candles, is the minimum amount of light. Plants in shade will appear elongated and less in flower. It’s necessary to use additional lights in the winter.
Provide nighttime lows of 55–64F and daytime highs of 64–75F. Plants can survive at temperatures outside of this range, down to almost absolute zero and up to 95°F.
Heavy fertilizing is necessary for vegetative petunias. Use 250–300 ppm of nitrogen in a continual feed schedule along with a balanced fertilizer of N:P:K=2:1:2.
Water your plants frequently, but remember that vegetative petunias are sensitive to excess water. The use of drip irrigation is advised. Leach occasionally to avoid salt buildup.
Use a disease-free, peat/perlite potting mix with a pH range of 5.5–6.0 and an EC range of 0.8–1.2.
For vegetative petunias, growth regulators are optional. High light levels negate the need for them. Use one to three sprays of B-Nine, 2 grams per liter, depending on the size of the plants you need to apply them. For 4-inch pot production, Bonzi is a good regulator.
Utilize a regular preventive spraying program to manage illnesses and pests. Aphids, leaf miners, and whiteflies are a few potential bug issues. Keep an eye out for illnesses including crown rot, Pythium, and botrytis. Start with material that is virus-free because viral illnesses can be a severe issue. Plant the liners just below the surface of the soil. Avoid letting your foliage get too wet.
Can petunias endure the heat in Arizona?
When I visited our neighborhood large box store last week, I was welcomed by the pallets filled with stunning red geraniums. This is a sight that infuriated me.
You might be asking why in the world the sight of lovely flowers enraged me. Since I am a horticulturist, I obviously adore flowers, therefore that is not what enraged me.
What if I told you that the majority of the annual flowers that were on show at the start of April were also available for purchase in September and October?
Now, if you think about this for a moment, you realize that the large box stores start selling their annual flowers in early April, just in time for the summer. That’s not very logical, is it?
Winter annuals are referred to as “Winter annuals are called that since that’s when they grow, not in the summer. They can’t stand the sweltering summers we have here in the desert.
If you don’t live in the desert and your summers aren’t as hot as ours, you could believe that this issue doesn’t affect you. I’m sorry to say that this issue affects Americans across the country.
Although I adore violas, these lovely hanging violas that were outside the nursery section will literally be toast in a few months. My violas, which have been growing well since late October, are beginning to exhibit indications of stress as a result of the two days last week when we had temperatures above 80 degrees.
So when I walk into the nursery section of my large box store this time of year, this is what irritates me. The winter annual flowers are tastefully arranged to draw customers inside. The customers may be seen imagining how lovely their gardens would look once they add some of these vibrant flowers.
What people fail to grasp is that the alyssum and petunias seen above will die in two months, wasting their money.
It’s interesting to note that the marigolds, which are orange in hue and typically thrive throughout the most of the summer, are planted alongside the petunias and alyssum.
Arizona is unique compared to other states in the union. We are able to cultivate annual flowers that are grown elsewhere in the nation in the summer because of our mild winters.
People trust their local plant nursery because they think they won’t sell anything that won’t grow in their garden. To market the appropriate plant at the appropriate time of year, they rely on their experience. Sadly, not all nurseries, especially those at big-box retailers, conform to this. People start to think they have a problem if they try to grow flowers or that they have a “When their newly planted flowers start to perish soon after planting, they have a black thumb rather than a green one.
You may prevent being a victim, and the remedy is actually very straightforward. Just conduct some research. To get started, all you have to do is type the phrase “summer annuals for” into Google (your city or area). A comprehensive list of plants that should do well in your region should be provided to you.
I’ve already done the online research for desert dwellers in Arizona and California. For details on when and what kind of flowers to plant, click the following link.