Historically, petunias have been a well-liked annual flower. Here’s how to plant a trailing petunia hanging basket for season-long blossoms!
Step 1: Select the Hanging Site and Install Hooks
Flowering petunia baskets can be hung in a variety of beautiful locations. Deck edges, gardenarbors, the edges of a porch on a house, even clothesline poles, or the edges of a garden shed.
A sturdy beam or post should be used as support. A planter can fill up quickly with weight since watered-in pots can get rather heavy.
Step 2: Choose a Hanging Basket
Consider the size of your basket and how well it retains moisture before you plant your petunias in a hanging basket. Smaller hanging baskets will need more watering because they won’t be able to hold as much moisture and may require less watering.
Hanging baskets are subjected to harsh weather conditions, including wind and rain. Consider choosing a hanging planter made of a weather-resistant material, such plastic or metal.
A different choice is to plant in old galvanized containers, particularly buckets with handles. I’ve got a whole post devoted to gardening in galvanized pots, along with suggestions and motivation from my own gardens!
Step 3: Add Potting Mix
Whenever you plant a petunia hanging basket, go with a premium potting mix. A soilless gardening media specifically designed for growing plants in containers is called a “potting mix.”
Make sure there is about an inch of space between the top of the soil and the rim of the hanging basket when you pour the dirt in.
Step 4: Add Your Plants
Make a hole in the potting mix in the middle of the basket using a trowel. Loosen the roots of the petunia before removing it from the pot gently.
Insert the plant into the hole, then cover it with soil. To get rid of any air pockets, pat the soil. Around the basket, keep placing the remaining petunias.
Step 5: Add Slow Release Fertilizer
You should make sure your plants are receiving the nutrients they require to flourish as a gardener. This is crucial when working with hanging baskets because they lose a lot of soil’s nutrients to leaching.
Due to their gradual release of nutrients into the soil, slow-release fertilizers are perfect for hanging baskets filled with petunias. They add nutrients to the soil and maintain the health of the plants throughout the growing season.
Step 6: Water Well
After putting your petunias in the hanging basket, make sure to give them plenty of water. The ideal method is to water your plants sparingly at first, then give them some time to absorb the liquid before adding more water until the potting mix feels saturated.
Finding out how to create a hanging basket with petunias is a terrific way to give any garden area an extra splash of color. If you want flowers that will draw hummingbirds and butterflies but have a small garden area, a trailing petunia basket is a great option.
Do hanging baskets work well with trailing petunias?
Add bright petunia hanging baskets to a porch, patio, deck, arbor, or pergola to make a statement. This iconic summer flower is available in a variety of hues and patterns to complement any exterior or landscaping design.
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When the weather gets warmer, it’s time to consider planting annuals, which will spruce up the yard with constant color for months. The vivid, long-lasting blooms, robust growth, and mounding, spreading, or trailing habits of petunias make them one of the most popular summer flowers and make them ideal for hanging baskets.
With so many types available, there are countless combinations that may be made with petunia hanging baskets. Despite the fact that a single variety can be grown on its own, petunias really shine when grown in groups of two or more in complimentary or contrasting colors and patterns. Here are some guidelines for making your own gorgeous petunia hanging baskets.
What’s going on with my trailing petunias?
If you want your trailing petunias to create long, dense trails out of baskets and containers, they need at least 6 hours each day of direct sunlight.
Of course, you can plant them where there is less direct sunshine, but their growth will be less rapid.
Drainage is also crucial, so lift any ground-based pots or containers with pot feet to prevent root rot.
How to Deadhead and Prune Trailing Petunias
Deadheading a plant does two things:
- to organize the plant and make it look better.
- to stop plants that set seeds from “going to seed. An annual plant frequently stops growing after it begins to produce seeds because it has fulfilled its reproductive function. By deadheading and preventing the plant from developing seeds, this can be avoided and growth can be prolonged.
A short Google search turns up dozens of authors who assert that if you want lengthy, dense trails, you should deadhead trailing petunias as frequently as you can.
There are various petunia types, such Wave and Surfinia, which grow well with relatively minimal deadheading and are ideal for the time-constrained gardener.
Regular deadheading (at least once a week, but ideally twice a week) is advised for the majority of other varieties of petunias.
Make sure to remove the seed pod along with the blossom after deadheading.
Pruning
One of the most crucial chores is pruning, but it’s sometimes ignored or done improperly.
When a stem is cut, side branches emerge and eventually grow into new stems.
The few stems you have will grow long and lanky with few side shoots and blooms if you don’t prune enough or forcefully enough.
We advise deadheading petunias once a week and trimming back any long, lanky stems to promote side-shoots that will trail. Start by trimming any stems that are frail or have few blooms or leaves.
When pruning, try to keep a uniform shape, but if the plant is a little lanky and sparse, don’t be afraid to remove half or more of the growth.
You can simply go ahead and forcefully trim back your plant to just below the rim of the basket or container if you believe it is already too far gone and is severely neglected, lanky, and lacking in blossoms. Always fertilize regularly after any vigorous trimming to promote growth.
How to Avoid “Flat Topping
Not only will the ideal petunia hanging basket or container have long trails, but it will also have a well-rounded top part with blooms and lots of leaves.
The top of the basket will appear flat and sparse if you let all of the stems in the center of the basket grow long and overflow the edge.
Simple pruning of the lanky stems to promote bushy growth near the top of the basket or container will easily stop this from happening.
Just go ahead and aggressively trim away any neglected trailing petunias until there are about 12 inches of the plant protruding over the edge of the basket. The plant will grow quickly, and much of it will be in the top part.
How Often Should Trailing Petunias be Watered?
Here is how often we water the containers and baskets we use for petunias:
- Summer days that are overcast, cool, and gloomy occur every two to four days.
- Every day or every other day in the heat, typical daywater.
- Very hot summer days, especially in the morning and evening.
Petunias need a lot of water, yet the roots prefer a soil that is damp but never soggy. Additionally, the baskets or containers should have a bottom that freely drains water.
If you water the basket and it starts to drain out the bottom right away, it’s likely that the soil is too dry and has contracted, and the water is just fleeing through the cracks. To fix this, water the plant, let it sit for 15 minutes to allow the soil to swell, and then water it once more. Moving forward, make an effort to stop the soil from drying out to the point where it shrinks.
Can petunias be overwatered? Yes, root rot is a possibility, but it typically only arises when a container or basket lacks drainage holes or when the potting soil is so dense that the water cannot escape. View the potting soil and baskets we recommend at the top of this page.
Even though it has been raining, should you water the petunias? It’s unlikely that a brief summer shower would be sufficient because we often water our petunias heavily. So we continue to water them even after it has rained. Although many are positioned beneath the roof overhang, which shields them from the majority of the rain, baskets and containers are frequently quite small and only catch a small amount of rain.
You must be careful not to drown the plant by flooding the roots if your basket or container has just one or two drainage holes.
Fertiliser and Feed
Every gardener will have a different answer when you ask them how frequently they fertilize their petunias. Nutrients that are flushed out of hanging baskets by watering need to be renewed, however there is no defined schedule.
Unfortunately, even plants in hanging baskets might receive too much fertilizer. Yellow leaves and stunted growth can result from having too much zinc, manganese, copper, or phosphorous, which can prevent iron from being absorbed.
Petunias grown in baskets should be fertilized every week. Therefore, every seventh watering will be required in the summer when you water once daily.
Since you won’t be watering as frequently and the nutrients won’t be washed out of the basket as frequently during cooler times, you can cut the frequency to around once every ten days.
Of course, fertilizing every two weeks will still yield fantastic results, but we believe applying more regularly will result in better development.
You won’t need to fertilize petunias in flowerbeds or the ground as frequently. Petunias planted in large containers don’t require as regular fertilization either.
Keep in mind that summertime drying out can cause baskets to require more watering. More fertilizer is needed to replenish lost nutrients the more water is used.
Watch out for symptoms of overfertilization like yellow petunia leaves. If that occurs, turn it down and give the petunias some iron that has been sequestered.
Best Fertiliser For Petunias
Starting with an excellent all-arounder like Miracle-Gro soluble universal fertilizer, which has a high concentration of nitrogen and is ideal for promoting long trails, is what we advise.
If you see that the petunias are a little lanky and are producing few or small blooms as the season progresses, you can replace the occasional feed with fertilizer that has a higher ratio of phosphorus.
In order to preserve the petunias’ leaves lush green, we also advise giving them a monthly dose of sequestered iron.
With the use of this product, we were able to restore the petunia foliage to a vibrant green color.
Which trailing petunia is the best?
Since it can give an endless show of spectacular color from May until October, flowering all along its trailing branches, “Surfinia” Petunia has been the top summer flowering trailing Petunia for more than a decade.
The number of petunias in a 12 inch basket
You must strike a fine balance between wanting a stunning presentation and not crowding your plants. One plant per inch of basket diameter, or 12 plants, would fit in a 12-inch basket due to the restricted room for roots and supplies.
You might find that as few as 5–6 plants are plenty to fill the basket well if you opt for a larger trailing plant, like Surfinia Petunias, or decide to use a Grandiflora as the basket’s centerpiece.
Deadheading trailing petunias is recommended.
Yes, deadheading is required for the majority of petunia varieties. Knowing how to deadhead petunias and remove them is a simple method to maintain your yard looking verdant and lovely. No one likes to look out into a landscape full of dead blossoms. Additionally, by removing the dead blooms, you prevent the plant from focusing its energy on producing seeds and instead encourage the growth of new blossoms, ensuring that your displays stay magnificent all summer long.
Deadheading is not necessary for supertunias or the slightly more resilient wave petunias. Wave Petunias continue to flower vigorously even without deadheading, but Kristin Winterbottom from Park Seeds advises removing faded blossoms to enhance the plant’s beauty (opens in new tab).
How are trailing petunias maintained?
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.