25 Excellent Flowers That Start With X

You'll find many interesting flowers that start with X to add to your garden. Some of them are hard to find in stores, so you may have to do some digging.

We have a list of flowers and flowering shrubs, and trees that start with X with crucial information so you can find something that will work in your garden.

To learn more about the various flowers available for your garden, make sure to check out our list of “Flower Names A to Z”.

Flowers That Start With The Letter X

Quick Look

x Chirtalpa tashkentensis (Chitalpa)
x Fatshedera lizei (Tree Ivy)
x Gordlinia grandiflora (Mountain Gordlinia)
x Gordlinia grandiflora “Sweet Tea” (Mountain Gordlinia)
x Heucherella (Foamy Bells)
x Petchoa (Petunia)
x Rudbeckia (Echibeckia Summerina)
x Solidaster luteus (Solidaster)
Xanthisma texanum (Texas Sleepy Daisy)
Xanthium strumarium (Cocklebur)
Xanthoceras sorbifolium (Yellowhorn)
Xanthorhiza simplicissima (Yellowroot)
Xanthosoma atrovirens (Mouse Cup Taro)

Xanthosoma sagittifolium (Elephant Ear)
Xanthosoma “Lime Zinger” (Elephant Ear)
Xeranthemum (Everlasting Plant)
Xeranthemum annuum (Everlasting Plant)
Xeranthemum lumina (Everlasting Plant)
Xerochrysum bracteatum (Everlasting Daisy)
Xeronema callistemon (Poor Knights Lily)
Xerophyllum (Common Beargrass)
Xylobium (Orchid)
Xylosma (Dense Logwood)
Xyris difformis (Yellow-Eyed Grass)
Xyris torta (Slender Yellow-Eyed Grass)

25 Gorgeous Flowers That Start With X

1. x Chirtalpa tashkentensis (Chitalpa)

Scientific Name: x Chirtalpa tashkentensis
Sun: Full sun, partial shade
Water: Drought tolerant, performs best with consistently moist soil
Size: 20-35 feet (6-10 meters)
Lowest Temperature: -10°F (-23.3°C)
Toxicity: None
Colors: Pink, white

Chitalpa is a fast-growing tree that can withstand drought conditions. However, the flowers will look their best when the tree receives consistent levels of water.

2. x Fatshedera lizei (Tree Ivy)

Scientific Name: x Fatshedera lizei
Sun: Partial shade
Water: Keep soil moist
Size: 3-5 feet (0.91-1.5 meters)
Lowest Temperature: 5°F (-15°C)
Toxicity: None
Colors: Green, white

This plant is a cross between Japanese fatsia (Fatsia japonica “Moserii”) and common ivy (Hedera helix). It’s a flowering ivy that works well as a groundcover but can be pruned to take on a bushy form.

3. x Gordlinia grandiflora (Mountain Gordlinia)

Scientific Name: x Gordlinia grandiflora
Sun: Partial shade
Water: Keep soil moist
Size: 20-30 feet (6-9 meters)
Lowest Temperature: 0°F (-17.7°C)
Toxicity: None
Colors: White

Mountain Gordlinia is a flowering plant that can be grown as a large shrub or a small tree. Small flowers bloom in summer and early fall. The plant is uncommon, so it’s hard to find in stores.

4. x Gordlinia grandiflora “Sweet Tea” (Mountain Gordlinia)

Scientific Name: x Gordlinia grandiflora “Sweet Tea”
Sun: Full sun, partial shade
Water: Keep soil moist
Size: 20-30 feet (6-9 meters)
Lowest Temperature: 0°F (-17.7°C)
Toxicity: None
Colors: Yellow, gold, white

“Sweet tea” Gordlinia is a cultivar of Mountain Gordlinia that can be found in the southern United States. The cultivar got its name because the flowers have a sweet scent and sweet tea is prominent in the southern states.

5. x Heucherella (Foamy Bells)

Scientific Name: x Heucherella
Sun: Partial shade, deep, shade
Water: Keep soil moist
Size: 1-1.5 feet (30-45 centimeters)
Lowest Temperature: -30°F (-34°C)
Toxicity: None
Colors: Pink, cream, tan, white

Foamy bells are a cross between coral bells (Heuchera) and foam flowers (Tiarella). Some varieties are evergreen in warm climates.

6. x Petchoa (Petunia)

Scientific Name: x Petchoa
Sun: Full sun, partial shade
Water: Keep soil moist
Size: Up to 12 inches (30 centimeters)
Lowest Temperature: -10°F (-23.3°C)
Toxicity: None
Colors: Pink, red, orange, yellow, blue, purple

x Petchoa is a petunia hybrid that boasts large, beautiful flowers available in various colors. They’re best suited for warm climates where they can receive regular watering.

7. x Rudbeckia (Echibeckia Summerina)

Scientific Name: x Rudbeckia
Sun: Full sun, partial shade
Water: Keep soil moist
Size: 1.5-2 feet (45-60 centimeters)
Lowest Temperature: -10°F (-23.3°C)
Toxicity: None
Colors: Red, burgundy, yellow, gold, brown, copper

Echibeckia Summerina is an echinacea hybrid. The long-lasting blooms need plenty of water, especially during extreme heat. It works well in containers since it’s a compact plant.

8. x Solidaster luteus (Solidaster)

Scientific Name: x Solidaster luteus
Sun: Full sun
Water: Keep soil moist or slightly dry
Size: 2-2.5 feet (60-76 centimeters)
Lowest Temperature: -30°F (-34°C)
Toxicity: None
Colors: Yellow

Solidaster is a hybrid between Solidago and Aster. It grows delicate pale yellow flowers that look fluffy on the plant, making them a gorgeous addition to flower beds.

9. Xanthisma texanum (Texas Sleepy Daisy)

Scientific Name: Xanthisma texanum
Sun: Partial shade
Water: Drought tolerant
Size: 1-3 feet (30-91 centimeters)
Lowest Temperature: 0°F (-17.7°C)
Toxicity: None
Colors: Yellow

The Texas sleepy daisy is in the Aster family. The blooms don’t open until the afternoon.

10. Xanthium strumarium (Cocklebur)

Scientific Name: Xanthium strumarium
Sun: Full sun, partial shade
Water: Keep soil moist, occasional flooding
Size: 2-4 feet (60-121 centimeters)
Lowest Temperature: 0°F (-17.7°C)
Toxicity: High, may be fatal if eaten
Colors: Green, purple, lavender

The cocklebur can be weedy since they grow rapidly and spread their seeds by hooking onto animals or clothing. Seedlings release toxic chemicals that can kill nearby plants.

11. Xanthoceras sorbifolium (Yellowhorn)

Scientific Name: Xanthoceras sorbifolium
Sun: Full sun
Water: Drought tolerant
Size: 8-25 feet (2.4-7 meters)
Lowest Temperature: -30°F (-34°C)
Toxicity: None
Colors: Red, burgundy, orange, yellow, cream, tan, white

The beautiful yellowhorn flowers are edible and taste somewhat like chestnut. The flowers change from green to red as they grow and mature.

12. Xanthorhiza simplicissima (Yellowroot)

Scientific Name: Xanthorhiza simplicissima
Sun: Partial shade, dappled sunlight
Water: Keep soil moist
Size: 2-3 feet (60-91 centimeters)
Lowest Temperature: -40°F (-40°C)
Toxicity: None
Colors: Purple, lavender, brown, copper

Yellowroot is a shrub that is aptly named for its yellow roots. It grows clusters of purple-brown flowers in the spring that droop down from the plant.

13. Xanthosoma atrovirens (Mouse Cup Taro)

Scientific Name: Xanthosoma atrovirens

Sun: Partial shade

Water: Keep soil moist

Size: 2-3 feet (60-91 centimeters)

Lowest Temperature: 10°F (-12°C)

Toxicity: None

Colors: Green, white

The mouse cup taro doesn’t always grow a flower. When it does, it grows a spathe and spadix that looks like the elephant ear’s (Xanthosoma sagittifolium).

14. Xanthosoma sagittifolium (Elephant Ear)

Scientific Name: Xanthosoma sagittifolium
Sun: Partial shade, full shade
Water: Keep soil moist
Size: 2-4 feet (60-121 centimeters)
Lowest Temperature: 10°F (-12°C)
Toxicity: None
Colors: Green, white

The elephant ear is a popular house plant among plant lovers. It can be grown indoors with bright, indirect light or outdoors in a shady spot.

15. Xanthosoma “Lime Zinger” (Elephant Ear)

Scientific Name: Xanthosoma “Lime Zinger”
Sun: Partial shade, full shade
Water: Keep soil moist
Size: 2-4 feet (60-121 centimeters)
Lowest Temperature: 10°F (-12°C)
Toxicity: None
Colors: Green, white

The Lime Zinger elephant ear is a vibrant green cultivar of Xanthosoma.

16. Xeranthemum (Everlasting Plant)

Scientific Name: Xeranthemum
Sun: Full sun
Water: Drought tolerant
Size: 1-2 feet (30-60 centimeters)
Lowest Temperature: -50°F (-45.5°C)
Toxicity: None
Colors: Pink, purple

Although a beautiful flower, the everlasting plant is often considered a weed because of its rapid growth and easy self-seeding tendencies.

17. Xeranthemum annuum (Everlasting Plant)

Scientific Name: Xeranthemum annuum
Sun: Full sun
Water: Drought tolerant
Size: Up to 2 feet (60 centimeters)
Lowest Temperature: -40°F (-40°C)
Toxicity: None
Colors: Pink, purple, white

Xeranthemum annuum is a cultivar of the everlasting plant. The flowers thrive in poor, dry soils.

18. Xeranthemum lumina (Everlasting Plant)

Scientific Name: Xeranthemum lumina
Sun: Full sun, partial shade
Water: Drought tolerant
Size: 24-28 inches (60-70 centimeters)
Lowest Temperature: 30°F (-1.1°C)
Toxicity: None
Colors: Red, purple, white

This is another cultivar of the everlasting plant. This variety prefers warm or hot climates and will tolerate partial shade.

19. Xerochrysum bracteatum (Everlasting Daisy)

Scientific Name: Xerochrysum bracteatum
Sun: Full sun, partial shade
Water: Drought tolerant
Size: Up to 5 feet (1.5 meters)
Lowest Temperature: 10°F (-12°C)
Toxicity: None
Colors: Pink, red, burgundy, orange, yellow, gold, white

Everlasting daisies are available in several vibrant colors and are often used in flower arrangements. Pruning spent flowers will encourage new growth and more blooms.

20. Xeronema callistemon (Poor Knights Lily)

Scientific Name: Xeronema callistemon
Sun: Full sun, partial shade
Water: Keep soil
Size: 2-3 feet (60-91 centimeters)
Lowest Temperature: 30°F (-1.1°C)
Toxicity: None
Colors: Red

Poor Knights lily is native to Poor Knights and Hen Islands in New Zealand, which is how they got their name.

21. Xerophyllum (Common Beargrass)

Scientific Name: Xerophyllum
Sun: Full sun
Water: Drought tolerant
Size: 3-6 feet (0.91-1.8 meters)
Lowest Temperature: -30°F (-34°C)
Toxicity: None
Colors: White

Common beargrass doesn’t always bloom in a garden because it typically blooms after a fire in the wild. Still, the foliage is pretty enough to keep in a flower bed as you wait for an uncommon bloom.