United States Edition

Petunia       

Petunia

Belonging to the Petunia genus, Petunia has a botanical name of Petunia.

Although some species of petunia are tropical perennials, today’s hybrids are usually grown as annuals.

Petunias are vigorous growers and and prolific bloomers; they like sun, some are fragrant and attract hummingbirds and butterflies.
The leaves are simple, light green, oval and along with the stems covered in small hairs, giving a sticky feel. Some petunia trail and are useful in pots and baskets, others are more compact and can be used to edge paths or at the front of the border.

Blooms appear in these approximate colours:   Cerise pink and   Violet and   Candy apple red. When mature, blooms are roughly 6.0 cm (that's 2.34 inches in imperial) in diameter.The mature flowers take a funnel form, with an approximate petal count of 5. When ripe, fruit appear in these approximate colours:   Android robot green. Leaves appear approximately as a   Forest green (web) and   La Salle Green colour. Petunia is a non-edible flower / ornamental annual, it will last but a year in its native climate. Petunia normally grows to a spreading habit with a max height of 7.02 inches (that's 18.0 cm metric). This plant tends to bloom in mid summer, followed by first harvests in late summer. Try planting Petunia if you'd like to attract butterflies and bees to your garden. Popular varieties of Petunia with home gardeners are Cascading, Easy Wave™, Wave Purple, dwarf bedding mixed colors and Tidal Wave™.

Argentina is believed to be where Petunia originates from.

Being a fairly low maintenance plant, Petunia is normally quite easy to grow provided a minimum level of care is given throughout the year. It will be helpful to note the correct soil, sun and water needs of this plant to ensure that this plant thrives.

This plant info is provided by the myfolia gardener's wiki. All details about Petunia have been kindly provided by our members.

How to grow Petunia

  • Full Sun

    OR +
  • Partial Sun

    +
  • Medium

The flowers fade quite quickly, so it is important to encourage more buds to form. To do this it is really worthwhile to dead head the old flowers. This can be quite tricky as the buds and the immature seed heads look pretty much the same! The easiest way not to pull off the buds by mistake is to remember that the plant flowers advance down the stem. So a bud will be ahead (nearest the growing tip) of the open flowers and the developing seed heads will be behind (nearer the plant). Nip the developing seed heads off with your finger and thumb and this will make the plant make more buds and flowers.

Enjoys a full sun / partial sun position in your garden and remember to water moderately. Zone 5 to 9 are typically the USDA Hardiness Zones that are appropriate for this plant (although this can vary based on your microclimate). Planting Petunia in potting mix and loamy soil with a ph of between 5.5 and 7.0 is ideal for as it does best in weakly acidic soil - neutral soil. Keep in mind when planting that Petunia is thought of as half hardy, so although it can survive a small mild cold snap, it is wise to ensure that this plant is protected from frost damage.

Growing Petunia from seed

Petunia seed needs light to germinate, so don’t cover the seed.
They germinate quickly, and should be potted up individually as soon as they are large enough to handle

Sow 0.12 inches (0.3 cm) deep with a guideline distance of 0.78 inches (2.0 cm). Soil temperature should be kept higher than 18°C / 64°F to ensure good germination.

By our calculations*, you should look at sowing Petunia about 77 days before your last frost date .

Transplanting Petunia

Grow the seedlings on under cover, potting up as needed and keep under cover until all danger of frost has past. Expose the young plants slowly to garden conditions and plant out.
Petunia are traditionally used as summer bedding and can be used at the front of the border but are more often used in pots baskets and containers.

As Petunia is half hardy, ensure temperatures are mild enough to plant out (around 15°C / 59°F as a guideline) - wait until after your last frost date to be on the safe side.

Harvesting Petunia

Petunia flowers are best enjoyed on the plant,

Seed Saving Petunia

Many petunia are hybrids, so will not come true to seed. If you have a favourite that you cannot do without next year, it is possible to over winter under protection, and take stem cuttings in the summer

Companion plants for Petunia

These plants have been known to grow well alongside Petunia so consider planting:

Traditionally planted in pots and baskets with other summer colour such as begonia, lobelia, coleus or french marigolds

Repellent plants for Petunia

These plants will not grow well with Petunia so avoid planting these within close proximity:

Common Petunia problems

These problems, diseases and pests are known to affect Petunia plants:

Over watering or poor drainage

Aphids

Other names for Petunia

Hybrid Petunia

Petunia x hybrida, Petunia x, Petunia hybrida

Latest Petunia Reviews

  • 14 Oct 2013
    Reviewed

    Amarylis Amarylis's Petunias planted up on balcony was Reviewed day 153

    I have had a great show from the 2 kinds of Petunias I planted on the balcony this year! ‘Frenzy Royal Velvet’ & ‘Frenzy Waterfall’ flowered extremely well up till the middle of Sept when they got mildew. I put them out as plug plants in June, they flower

    4 stars

  • 10 Oct 2012
    Reviewed

    Russell_G Russell_G's Pertunia 'Super Cascade' F1 Hybrid was Reviewed day 235

    Great seeds that gave me an abundance of flowers from each plant. Beautiful colours and the blooms started early June and continued all the way through till the end of September.

    5 stars

  • 05 Jun 2012

    goddessjoy goddessjoy's Pinstripe Petunia was Reviewed day 60

    This petunia is wonderful. It is a reliable, profuse bloomer and is holding up nicely in direct, hot sun.

    5 stars

  • 05 Jun 2012

    goddessjoy goddessjoy's Black Petunia was Reviewed day 60

    This petunia is more profuse in its blooming habit than any other petunia I have ever grown. It just won’t stop! Beautiful flower color with no striping at all. Is holding up nicely in my hot, dry, sunny patio garden.

    5 stars

  • 14 May 2011

    macchick macchick's Petunia 'Blue Wave Hybrid' was Reviewed day 69

    These wave petunias are easy to start from seed and flower all summer without much intervention.

    5 stars

See all Petunia reviews and experiences »

Petunia care instructions

How long does Petunia take to grow?

These estimates for how long Petunia takes to sprout, grow and harvest are from real observations from real gardeners, right around the world. Start logging and journaling your observations to participate!

When should I plant Petunia?

Our when to plant Petunia estimates are relative to your last frost date. Enter your frost dates and we'll calculate your sowing and planting dates for you!

Footnotes

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