
Here’s how:
- Trim off a healthy portion of stem that’s around 6 inches long. ...
- Remove foliage from the bottom half of the stem.
- Dip the cut end in rooting hormone.
- Plant the stem in a small container filled with moistened soilless potting mix, and place it in bright, indirect light.
- Keep the growing medium moist, and you should have root growth in a few weeks.
How do you grow petunias from seed?
Petunia seeds are very small and needs lots of light in order to germinate. Remember to water them. When the plants have three leaves, you can plant them outside. It’s best to buy transplants and plant them in light, well-drained soil in full sun after the last spring frost.
How far apart do you plant petunias?
1 Petunia seeds are very small (dust-like!) and need lots of light in order to germinate. 2 When the plants have three leaves, plant them outside. 3 Space the plants about 1 foot apart. 4 If you’re planting petunias in containers, use a container potting mix that will drain well.
Can you plant petunias outside in the shade?
When the plants have three leaves, you can plant them outside. It’s best to buy transplants and plant them in light, well-drained soil in full sun after the last spring frost. (See your local frost dates.) Petunias can grow in partial shade, but they will have fewer flowers.
What can I plant with my petunias?
Pair them with other full sun plants for a really spectacular display. Similarly, companions for petunias should have relatively low water requirements. Petunias do need a decent amount of water, so don’t pair them with any cacti, but try to avoid plants that need continuously moist soil.
See more

How far apart do you plant mounding petunias?
PlantingSpace grandifloras and multifloras about 12 inches apart in full sunlight, or several inches closer together when planted in a shadier location.Milliflora petunias can be spaced as close as 4 to 6 inches.The spreading ground-cover types of petunias should be planted at least 1 1/2 feet apart.More items...
What is a mounding petunia?
Regular Supertunia petunias are vigorous with slightly mounded habits that function as both fillers and spillers in containers. They are also excellent landscape plants, best suited to be placed near the front of beds. They have medium to large sized flowers.
What month is best to plant petunias?
As with almost all bedding plants these days, you can find a wide assortment of petunias at local garden centers. For best results, plant petunias in September through early November or late January through mid-March.
How many petunias can you plant together?
threeWhen planting petunias in containers, be sure not to crowd your plants, limiting yourself to three per 12-inch (30 cm.) pot. If your petunias start to flag or grow leggy, cut them back and fertilize them. They should branch out with vigor.
How do you keep petunias looking good?
How to Keep Petunias Blooming All SummerMAKE SURE THEY GET ENOUGH SUN. Petunias need at least 6 hours of full sun per day. ... WATER THEM WELL. Keep the soil consistently moist, but not soggy. ... APPLY FERTILIZER REGULARLY. Apply a controlled-release fertilizer when you plant your petunias. ... GIVE THEM A TRIM.
What's the difference between Wave petunias and regular petunias?
Wave petunias have a unique trailing growth habit and are highly prolific in their blooming. They drape over the sides of containers and raised beds and are great summer performers. A regular petunia has an upright or bush growth habit. It may spread slightly, but will not drape down as dramatically as a Wave petunia.
How deep should you plant petunias?
0:251:03How Far Apart Do You Plant Petunias? : How to Grow & Maintain ...YouTubeStart of suggested clipEnd of suggested clipDo not disturb the roots keep the roots whole plant. Them in the ground with the soil at the bottomMoreDo not disturb the roots keep the roots whole plant. Them in the ground with the soil at the bottom of the plant.
Can you plant petunias in April?
Summary. In summation, it is important to sow petunia seeds indoors approximately 10 weeks before the intended outdoor planting date. This should be after the danger of potential frost has passed, which could be anywhere from late February to early March or April or late April to early May, depending on where you live.
How do you prepare soil for petunias?
Petunias like fertile soil which drains well and is neutral to slightly acid (pH 6.0 to 7.0). Light, sandy soil is ideal. Break up the soil by digging down 6 or 8 inches, mix in some organic matter, and then smooth and level it. Dig a hole for each petunia seedling about the size of its container.
What happens if you plant petunias too close together?
If you plant flowers too close together, the plants get stressed and are prone to diseases, Kole says. If air can't properly circulate and the plants can't dry out between waterings, fungus sets in. Roots can rot. And once plants are weakened from stress, insects move in.
What pairs well with petunias?
The petunia works well with a host of flowering plants as well as around herbs and vegetables. They love lots of sun and well-drained soil with regular watering, which makes them easier to maintain than the fussier flowers in your garden.
Do petunias spread out?
Often referred to as 'trailing' petunias, wave petunias can spread several feet if they are sown in a large, open area such as a garden or outdoor floor bed. Most other petunia types will only spread slightly, if at all, especially when grown in pots, hanging baskets or window boxes.
What's mounding perennial?
Perennials tend to be used by gardeners to fill in gaps in the garden with color and texture. Mounding perennials are known for their girth rather than their height. They can overflow a container, drooping down the side in cascades of color in pots on porches or in hanging baskets.
Do hummingbirds feed on petunias?
Petunia (Petunia Group) They work well in just about any sunny garden location and are also favorites for containers, borders, and baskets in small spaces. The flower thrives best in full sun and will bloom repeatedly, providing abundant nectar for hungry hummingbirds.
What are the best petunias for hanging baskets?
The best petunia varieties for your hanging baskets are milliflora and multiflora petunias. These two types of petunias have trailing growth habits and bloom intensely. The flowers will drape and hang over the sides of hanging baskets and create a very dramatic display.
How do I get my petunias to bloom more?
Petunias grow and bloom best in sun. Sun is what generates energy in plants, so the more sun they get, the stronger the plants will grow and the more flowers they will produce. If your Supertunias look healthy but aren't growing very fast or have few flowers, move them to a sunnier location.
How far can petunias spread?
Spreading or Trailing Petunias: These are low-growing and can spread as much as 3 to 4 feet. They form a beautiful, colorful groundcover because the flowers form along the entire length of each stem. They can be used in window boxes or hanging baskets.
How big do petunias get?
The flowers reach 2½ to 3 inches across. ‘Madness’ series petunias have big, 3-inch flowers in many veined and solid colors. They are compact and bloom until frost. They bounce back well after rain. ‘Double Madness’ petunias are compact and floriferous with big, 3-inch flowers all through the summer.
Why are Grandiflora petunias not growing in the south?
These large petunias often do not fare as well in the south because they’re prone to rot during humid, hot summers.
How big are Milliflora petunias?
Millifloras: Milliflora petunias are much smaller than any other petunias on the market. The flowers are only 1 to 1½ inches wide, but they are prolific and last all season!
When do petunias get leggy?
Getting Leggy in Midsummer. By midsummer, most petunias tend to get leggy, producing blossoms at the tips of long, leafless stems. To keep petunias tidy and flowering, we prune the shoots back to about half their length. This will encourage more branching and more flowers.
Do petunias have bugs?
Petunias have few serious insect or disease pests, though aphids and slugs can be an issue. Avoid wetting the foliage and flowers when watering to help prevent disease.
Do petunias need sun?
Petunias need full sun or they will become spindly. They don’t tend to flower well in shade. They are quite versatile, growing well in different types of soil as long as the soil drains well and doesn’t stay wet. Soil should be moderately fertile to promote the best growth. Amend poor soil with compost prior to planting.
Where to plant Wave Petunias?
However, petunias do not tolerate the scorching sun. In very hot regions, it is recommended to plant them in a place that will be half-shaded for part of the day. On the other hand, surfinias prefer a sunny situation if the soil remains very cool, almost humid.
How to grow wave petunias?
Plant them in ordinary soil. Wave Petunias are not very demanding, but a fertile soil will guarantee their abundant flowering. To make a success of the surfinias, offer them a fresh soil so that the root ball does not dry out.
What is a wave petunia?
Wave Petunias are great regulars on your balconies and windowsills. Annual or perennial herbaceous plants (but often cultivated as annuals), they are not very tall and spread out widely.
When do petunias get pulled out?
Seasonal cultivation does not take into account our winters, so petunia pots and field borders are pulled out in late autumn and renewed each spring.
How to root a plant in a hot area?
If it is very hot in your area, prefer half-shade. In any case, avoid areas that are too windy because it fears wind and drafts. Moisturize the root ball well before installing your plants. Dig a large planting hole and loosen the soil well to facilitate rooting.
When to sow seeds in a terrine?
The sowing of seeds is carried out in March under cover at a constant heat of more than 59°F : Sow in a terrine filled with potting soil for sowing. Keep the substrate cool by watering with light rain. Choose the most beautiful plants and transplant them in individual pots when they have 4 leaves.
Can petunias grow in the sun?
But its culture is of a great simplicity. Petunias grow in any soil provided that this one is well drained. They bloom in the sun but can also stand half-shade. Rain can damage the fragile flowers of some varieties.
Do petunias need to be in containers?
This doesn’t mean you should neglect your petunias, but you should allow the soil to dry out completely between waterings.
Can you water petunias from below?
Wetting the flowers and foliage can promote disease, so water either from below or close to the surface of the soil. You don’t want to waterlog your roots either, though, so make sure your container has very good drainage. Petunias are heavy feeders.
Can you grow petunias in pots?
However, growing petunias in pots, regardless of their type, should not disappoint you, as long as you treat them right. When planting petunias in containers, be sure not to crowd your plants, limiting yourself to three per 12-inch (30 cm.) pot.
What is companion planting with petunias?
Companion planting with petunias is often about picking a plant whose shape accents their shape. If you’re planting in a container and want to try the Thriller, Filler, Spiller effect, plant small upright petunias around a tall, striking plant or add a trailing one to soften the container’s edge.
Do petunias need water?
Similarly, companions for petunias should have relatively low water requirements. Petunias do need a decent amount of water, so don’t pair them with any cacti, but try to avoid plants that need continuously moist soil.
Do petunias bloom?
Image by sonyae. Petunias are fantastic annual bloomers. If you’re looking for bright colors, good variety, and forgiving growing conditions, look no further. If you’re really serious about adding some color to your garden or patio, however, you might want some companions for petunias to mix things up a bit. Keep reading to learn ...
Can wave petunias grow straight up?
Some varieties like “ Wave ” and “Surfinia” will trail out of a basket or creep along as groundcover. Many grow straight up, but some get so top heavy when they do this that they’ll cascade over the edge of a pot. Companion planting with petunias is often about picking a plant whose shape accents their shape.
Do petunias need full sun?
There are more practical considerations when companion planting with petunias, too. Petunias are very vigorous growers and bloomers, and they’ll muscle out any neighbors that are too delicate. They perform best in full sunlight, and need at least partial light to grow.
What are the two types of petunias?
PATSTOCK / Getty Images. Cascadia and Surfinia are two more popular types of petunias. These are bred for their trailing habit, vivid colors, and prolific flowering. They generally have the wide flowers of traditional petunias, in unusual colors.
How big do Grandiflora petunias get?
Grandiflora Petunia. Frederic Didillon / Photolibrary / Getty Images. Grandifloras are one of the oldest varieties. These petunias grow 8 to 12 inches high and have the large (4 to 5 inch), wavy-edged blossoms that petunias first became known for. The flowers can be single or the more ruffled doubles.
How tall do wave petunias grow?
The wave series created quite a stir when first introduced and the flowers just keep improving. Wave petunias grow only 6 inches tall but can spread to 4 feet. That feature would be enough to make them worth growing, but wave petunias also do not need deadheading. On the downside, they do wear out in the hottest part of the summer. Prolonged heat diminishes flowering in wave petunias, but a little pruning will usually revive them. Wave petunias make wonderful groundcovers and trailers for containers. There is also a 'Tidal Wave' series, which tends to stay a bit more upright.
Is Multiflora petunia good for garden beds?
Because of their mounding habit, multiflora petunias are a better choice for garden beds than grandifloras and they work very well in containers. There are also hybrids of grandiflora and multiflora petunias, which share qualities of both types. A whole new category was created to describe them, known as the floribundas.
Do petunias bloom in summer?
Petunias have been garden favorites for decades. These annual flowers bloom almost nonstop throughout the summer. Traditional petunias favored cool weather and needed constant deadheading to continue blooming. More recent introductions, such as the wildly popular wave petunias and the petunia look-alike Calibrachoa, or Million Bells, ...
Do wave petunias wear out?
On the downside, they do wear out in the hottest part of the summer. Prolonged heat diminishes flowering in wave petunias, but a little pruning will usually revive them. Wave petunias make wonderful groundcovers and trailers for containers. There is also a 'Tidal Wave' series, which tends to stay a bit more upright. 04 of 06.
Is Supertunia a plant?
ZoomTravels / Getty Images. The Supertunia series is vegetatively propagated, meaning it is grown from cuttings and does not grow true to seed. Supertunias are part of the Proven Winner plant line. Supertunias are extremely vigorous growers and bloomers, but they require frequent feeding to stay at their peak.
