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Giant Flowers To Plant In Your Gardens Now

Size does matter, especially when it comes to flowers. The bigger the better! Let’s talk about what giant flowers you need to plant in your gardens now.

Spring is finally here, and I’m trying to start planning for my outdoor gardens. I always try to have showstoppers with giant flowers in the gardens so I can stop and marvel at them, and to make my neighbors jealous.

Just kidding of course! But, thinking of the largest blossoms…

I’ve done some research to find the plants with giant flowers and want to share them with you. We can all have showstoppers with the largest blossoms around!

Here are some of my large blossom favorites that will grow in about any USDA growing zone.

Amaryllis (Hippeastrum group)

red amaryllis large blossom
Amaryllis

You know these flowers!

Amaryllis are popular at Christmas time and produce some really beautiful blossoms. Did you know that you can plant amaryllis bulbs outside too?

In the spring, they produce beautiful trumpet-shaped flowers on tall, leafless stalks. Then bring them indoors in early to mid-autumn for a dormant period so they can get ready to bloom again at Christmas.

  • USDA Growing Zone: 8 to 10
  • Color Varieties: Red, pink, white, multi-colors
  • Sun Exposure: Full sun to part shade
  • Soil: Well-drained potting soil; rich, well-drained soil in the garden

Here’s a link to get your amaryllis bulb from Amazon. We had this one at Christmas. It had so many blossoms on it that it was crazy!

Butterfly Bush (Buddleia davidii)

purple butterfly bush
Butterfly Bush

Blooming from summer through autumn, the butterfly bush has massive flower spike blossoms.

It is an evergreen shrub and will provide color and interest all year long. The giant flowers attract butterflies and hummingbirds.

  • USDA Growing Zone: 5 to 9
  • Color Varieties: Blue, white, purple, pink
  • Sun Exposure: Full sun
  • Soil: Average, well-drained soil, no fertilizer

This is the butterfly bush plant we got from Amazon. It took off right away and the hummingbirds love it!

Camellia (Camellia spp.)

pink camellia flower
Camellia

Camellias are dense shrubs with beautiful foliage and bright, long-blooming giant flowers.

The Mrs. D.W. Davis camellia first bloomed in 1951. Its buds can get as large as golf balls, and its blush pink blossoms can be 6 inches across.

  • USDA Growing Zone: 7 to 9
  • Color Varieties: White, pink, red, yellow, lavender
  • Sun Exposure: Part shade
  • Soil: Moist, acidic, well-drained soil

We love this pink Dad’s camellia.

Clematis

purple clematis flower on vine
Clematis

Plant these on your fence, trellis, or post and you will have a spectacular display of vine and giant flowers.

The one we love, President clematis, produces purple flowers as big as 8 inches across on its vines in May and June, and then again in September and October.

The flowers attract hummingbirds. When the flowers fade, the seed heads provide continuing interest.

  • USDA Growing Zone: 4 to 8
  • Color Varieties: White, pink, red, yellow, lavender
  • Sun Exposure: Full sun
  • Soil: Sandy or amended clay

We found The President clematis at Amazon for you.

Cockscomb (Celosia argentea var. cristata)

cockscomb or celosia
Cockscomb

The plumed cockscomb is an old-fashioned garden plant that features large crested flower heads that can get as large as 12 inches across.

The flowers resemble a rooster’s comb. The plant will bloom summer through to the first frost.

  • USDA Growing Zone: 2 to 11
  • Color Varieties: orange, red, pink, purple, yellow
  • Sun Exposure: Full sun
  • Soil: Rich, well-drained soil with even moisture

You can sow these seeds at the first hint of spring. This packet has 100 seeds of the colorful celosia mix.

Dahlia Dinner Plate (Dahlia hybrids)

purple dahlia is 10-12 inches across
Dinnerplate Dahlia

You’ll want to have several of these beauties planted in the sunny garden back by the fence.

My favorite dahlia is Thomas Edison, which produces vibrant purple flowers that are 8+ inches across. They make magnificent cut flowers for arrangements.

Here in the northwest, we bring the tuberous roots inside for the winter and replant in the garden every spring.

  • USDA Growing Zone: 8 – 11
  • Color Varieties: white, red, pink, purple, yellow, orange, bi-color
  • Sun Exposure: Full sun to part shade
  • Soil: Fertile loam

We have this beautiful purple Thomas Edison dahlia in our garden. We live in zone 8a, so we lift the bulbs in the fall and replant in the spring for summer blooming.

English Rose (Rosa hybrids)

english roses look like peonies
English Roses

The “Brother Cadfael” English rose produces some of the most spectacular and largest blooms of all the English roses. Growing as large as 5 inches wide, the pink blossoms look like peonies.

Plant the English rose in the back of your garden beds and enjoy the flowers from late spring through until the last frost.

  • USDA Growing Zone: 4 to 11
  • Color Varieties: White, yellow, red, pink, orange, and bicolor
  • Sun Exposure: Full sun
  • Soil: Well-drained loam

This David Austin Jubilee English rose has performed very well in our garden.

Hardy Hibiscus (Hibiscus moscheutos)

pink hibiscus
Pink Hibiscus

Summer Storm hibiscus grows to only four feet tall, but it has beautiful dark purple foliage and produces showy pink flowers that are 8 to 10 inches across.

Flowering all the way through until fall, the leaves will turn yellow-orange when it starts to turn cold. The flowers will attract hummingbirds and butterflies.

  • USDA Growing Zone: 4 to 9
  • Color Varieties: White, red, pink,
  • Sun Exposure: Full sun
  • Soil: Well-drained loam

I found these Summer Storm hibiscus seeds for you.

Hydrangea (Hydrangea Arborescens)

giant blue hydrangea flower
Hydrangea

The Incrediball Hydrangea is fabulous with 12-inch blossoms on sturdy stems. The flowers begin green, bloom into white or pink, and fade back to green at the end of the season.

The best part is that this Incrediball has really strong stems and won’t fall over even after heavy rain.

  • USDA Growing Zone: 3 to 9
  • Color Varieties: blue, pink, white, red, purple
  • Sun Exposure: Full sun to part shade
  • Soil: Fertile loam

Here’s a link to the blush colored incrediball hydrangea. You won’t regret getting one.

King Protea (Protea cynaroides)

pink king protea
King Protea

Known for its huge goblet or bowl-shaped flower heads, the King Protea produces the largest heads of the species, getting as large as 12 inches across.

They are truly giant flowers, just spectacular specimens.

  • USDA Growing Zone: 9 to 12
  • Color Varieties: Red, pink, creamy white
  • Sun Exposure: Full sun
  • Soil: Average well-drained soil, acidic

The potted plants are over $100 each, but there are seeds available. This link is for five King Protea seeds.

Moonflower (Ipomoea alba)

white moonflower
Moonflower

Having a moonflower in your yard is a wonderful thing.

The large trumpet-like flowers unfurl in the evening and stay open until the sun rises.

The blossoms can get up to 6 inches long and 6 inches wide. Some of the varieties have a lemon fragrance to complement their beauty.

  • USDA Growing Zone: 10 to 12
  • Color Varieties: White, purple
  • Sun Exposure: Full sun
  • Soil: Any soil type

Amazon sells several selections. This offer has two packets: one with white flowers (65 seeds), the second with purple flowers (10 seeds).

Tree Peony (Paeonia suffruticosa)

tree peony produces large blossoms on tree
Tree Peony

The tree peony blooms for only two weeks, but what a prolific two weeks it is! The small trees will produce over 50 flowers that are 8 to 10 inches across.

One more thing: they are deer resistant. We love peonies!

  • USDA Growing Zone: 4 to 8
  • Color Varieties: Coral, magenta, white, red, pink, purple, yellow
  • Sun Exposure: Full sun to part shade
  • Soil: Fertile loam

Here’s a link to the Sarah Bernhardt peony bare root plant that you’ll want to plant in the spring.

Orienpet Lily (Lilium hybrids)

orienpet hybrid lillies
Orienpet Montego Bay

This plant is a cross between Oriental and Trumpet lilies that combines the beauty of the Oriental with the robustness and colors of the Trumpets.

They will bloom earlier than the Oriental lilies and will better survive cold winters than either.

Producing large flowers with a sweet fragrance at the end of the lily season, this lily is a welcome addition to the garden.

The Montego Bay will produce stunning, star-shaped blossoms that are yellow-pink-colored with a red-wine smear. The flowers get up to 12 inches wide.

  • USDA Growing Zone: 4 to 8
  • Color Varieties: white, yellow, pink, apricot, burgundy, red, bi-colors
  • Sun Exposure: Full sun to part shade
  • Soil: Medium-moisture, well-drained soil, slightly acidic

Here’s a link to an offer that includes three bulbs of the Montego Bay Orienpet.

Oriental Poppy (Papaver orientale)

pink oriental poppy
Oriental Poppy

These are rugged plants that will flourish almost anywhere: rock gardens, lush gardens, cottage gardens.

Oriental poppies have dark green foliage and produce huge, crepe-petaled blossoms that can get up to 8 inches across.

We have planted these in the back areas of our property and they bloom every year. Our favorite is this pink oriental poppy.

  • USDA Growing Zone: 3 to 9
  • Color Varieties: orange, red, pink, purple, white, peach, maroon, salmon
  • Sun Exposure: Full sun
  • Soil: Fertile, well-drained soil with average moisture

Giant Flower Sunflower (Helianthus an.)

large blossoms sunflowers in the sun
Sunflowers

Imagine bright yellow sunflowers that reach for the sky and show off their 14-inch flower heads on top of 15-foot tall stalks.

You’ve got to plant the Pikes Peak sunflower to get the effect of the giant flowers.

Plus you’ll get the world’s largest sunflower seeds from these flowers.

You might have to beat the birds to the harvest though.

  • USDA Growing Zone: true annuals in all climates
  • Color Varieties: Yellow, brown, burgundy, red
  • Sun Exposure: Full sun
  • Soil: Well-drained soil rich in nutrients

Double White Angel’s Trumpet (Brugmansia x Candida)

white angel trumpet flowers
Angel Trumpet

The Angel’s trumpet boasts beautiful hanging flowers that can grow up to 20 inches long.

If you can find it, the double white angel’s trumpet is spectacular!

In the evening, they release a delicious fragrance across the entire back yard. Bonus: the flowers are deer resistant.

  • USDA Growing Zone: 8 to 10
  • Color Varieties: White, peach, pink, orange, yellow
  • Sun Exposure: Full sun
  • Soil: Acidic soil

Largest Blossoms Ever

So you’ve found out that size does matter, especially when it comes to flowers. The bigger the better!

We located 16 of the largest blossoms that are available for you to plant in your garden now.

Which giant flowers did you fall in love with? Choose the ones you want and get them ordered so you can plant them in your gardens now.

Interested in Perennials?

bright magenta and orange pincushion flower
Pincushion Flower

It’s time to think about fall when you’re planning your spring planting. Here are the 24 best perennial plants you should plant now for spectacular fall color.

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