18 Plants that Grow Big and Huge Flowers

Raul Cornelius is a Senior Editor at BalconyGardenWeb and an expert in flower and herb cultivation based in Phoenix, Arizona. A frequent speaker at horticultural events, he is also an active contributor to Facebook flower groups. Holding an MBA and a BCom, Raul blends his gardening skills with strong leadership and analytical abilities. Passionate about writing and photography, he enjoys early mornings with coffee and books, and nature bike rides during weekends.
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Check out Plants that Grow Big and Huge Flowers and add them to your garden to surprise your guests with their enormous blooms!

Do you know about Plants that Grow Big and Huge Flowers? Here’s an exclusive list of the world’s largest blooms!

Have a look at the best large indoor plants here

Plants that Grow Big and Huge Flowers

1. The Corpse Flower

Plants that Grow Big and Huge Flowers

Botanical Name: Rafflesia arnoldii

Also popular as the giant Padma, this flower is native to the rainforests of Indonesia and can grow 3-4 feet wide! The bloom emits a repulsive odor like rotten meat.

Find out the best large foliage plants here

2. King Protea


Botanical Name: Protea cynaroides

This national flower of South Africa offers artichoke-like blooms that can measure upto 6-10 inches wide. The blossoms have pointy and colorful bracts.

3. Bigleaf Magnolia

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Botanical Name: Magnolia macrophylla

Bigleaf Magnolia is famous for its huge oblong-ovate green leaves and ornamental white blooms that can be as big as 8-12 inches.

4. Mammoth Russian Sunflower


Botanical Name: Helianthus annuus ‘Russian Mammoth’

Like the name, the huge mammoth sunflowers open to 10-16 inches wide flowers on a plant that can reach upto 12-24 feet high!

Find out the flowers that look like a sunflower here

5. Ornamental Onion

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Botanical Name: Allium ‘Globemaster’

The spherical blooms of ornamental onions open in 10-inch violet-purple orbs on 2-3 feet long stems from late spring to early summer.

6. Primal Scream Daylily


Botanical Name: Hemerocallis ‘Primal Scream’

The striking tangerine orange blooms measure up to 6-8 inches across. This variety is a tetraploid, which means it has four times more than the normal chromosomes that offer huge blossoms.

7. Dinnerplate Dahlia

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Botanical Name: Dahlia

Dinner plate dahlia opens to 8-12 inches across blossoms in multiple hues. ‘Lady Darlene’ with red petals, and ‘Alex Mingus’ featuring yellow blooms are the best!

Find out some stunning plants with purple leaves here

8. Candle Larkspur

Botanical Name: Delphinium ‘Cobalt Dreams’

The blue flower spikes can grow upto 2-3 feet tall in a striking shade of blue! This variety is a part of the New Millennium Series and can easily withstand heat and humidity.

9. Burgundy Chinese Hibiscus


Botanical Name: Hibiscus ‘Black Dragon’

The velvety dark burgundy petals spread up to 8-10 inches across. The bloom’s center is almost black, giving it a rich feel.

10. Night-Blooming Cereus


Botanical Name: Selenicereus grandiflorus

It is a variety of orchid cactus with flowers that can measure upto 6-9 inches wide. The blooms have an intense fragrance, and they bloom only at night.

11. Oriental Lily

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Botanical Name: Lilium ‘Casa Blanca’

The pure white and fragrant flowers can measure almost 8-12 inches tall. They come in clusters, which makes them appear bigger than they actually are.

12. Shimadaijin Tree Peony


Botanical Name: Paeonia suffruticosa ‘Shimadaijin’

‘Shimadaijin’ features scented blooms that can measure 5-8 inches across on a 4-5 feet tall plant. The blooms come in pink, yellow, white, magenta, and red hues.

Find out the best purple Peony varieties here

13. Sacred Lotus


Botanical Name: Nelumbo nucifera

Also popular as the Egyptian lotus, this lovely pond plant offers blooms in rose hues that fade to pink. The flowers spread 8-12 inches across and emit a unique fragrance.

14. Limelight Hydrangea

Botanical Name: Hydrangea paniculata ‘Limelight’

This hydrangea boasts a cluster of flowers that can be as wide as 6-8 inches. The blooms open in a chartreuse color and then fade to a pink hue.

15. Indian Summer Rudbeckia

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Botanical Name: Rudbeckia hirta ‘Indian Summer’

This short-living perennial is the ‘All America Selections’ winner with flowers that can be 6-10 inches wide. Grow it in direct sunlight for an intense yellow hue!

16. Mrs. Edwards Whitaker’s Water Lily


Botanical Name: Nymphaea ‘Mrs. Edwards Whitaker’

This classic tropical water lily is an heirloom cultivar with 8-12 inches or wider flowers. The blossoms have lavender petals that mature to white with gold stamens in the center.

Look at the best miniature Water Lily varieties here

17. California Giant Zinnia

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Botanical Name: Zinnia ‘California Giant’

‘California Giant Mix’ Zinnia displays a mix of shades, including white, pink, purple, yellow, and orange. The blooms open 3-5 inches across on tall stems.

18. Early Large Flowered Clematis


Botanical Name: Clematis ‘Fireworks’

The blooms open 3-7 inches from late spring to early summer and again during fall. They have lavender-blue petals with bright magenta stripes.

Look at the best Clematis varieties here

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