15 Flowers That Start With K: Kaleidoscopic Plants for Your Garden

Flowers that start with K mostly come in multiple colors and will give your garden the most beautiful look. So long as you grow them in the right conditions, these flowers are super easy to grow. To learn more about the best flower for you, read this article.

Types of Flowers That Start With K

1. Kangaroo Paws (Anigozanthos Spp.)

Kangaroo Paws are perennial plants that are native to Southwest Australia. They have tubular flowers that can be white, yellow, orange, purple, pink, and red hot and resemble the paws of a kangaroo. These grass-like plants have slender, long, arching leaves. This beautiful plant attracts hummingbirds and butterflies.

• Size: The Kangaroo Paws can grow 2–10 feet (0.3–3 meters) tall and 1–2 feet (30–60 centimeter) wide depending on the species.
• Temperature and USDA hardiness zone: These are warmth-loving plants that grow best in zones 10–11.
• Humidity: The humidity levels should be above average humidity.
• Light: Grow the plants in full sun. However, they can grow in partial shade.
• Soil: The soil is best sandy, yet moist.
• Watering: Ensure that the plants never suffer from drought.

2. Kaffir Lily (Clivia Miniata)

These are border or edge plants with thick long leaves and orange, cream, yellow, or pink flowers. They are native to woodland habitats in Eswatini and South Africa. Other names for this lily are Fire Lily, Bush Lily, Natal Lily and Clivia Lily.

• Size: These lilies can grow to reach 2 feet (60 centimeters) tall and 2–3 feet (60–90 centimeter) wide.
• Temperature and USDA hardiness zone: Zones 10 and 11 are best as they are warm like the native habitat of this plant.
• Humidity: Humidity levels should be 75 percent and above.
• Light: Lilies prefer partial sun so that they do not get burnt.
• Soil: Grow them in loam or loam-sandy soil.
• Watering: Water your lilies as soon as the soil starts to dry out.

3. Kobushi Magnolia (Magnolia Kobus)

This is a tree or large shrub with nice-smelling white leaves. The beautiful plant is a native of Japan and Korea.

• Size: The tree can reach 25–30 feet (9.1–10 meters) tall.
• Temperature and USDA hardiness zone: The cool tree grows best from zones 5–8.
• Humidity: The humidity levels are best kept around average.
• Light: Grow the white tree in the full sun as a slightly partial shade.
• Soil: The soil should remain nutrient-rich and well-drained. Make use of loam.
• Watering: Maintain consistently moist but well-draining soil.

Note that this tree is slow-growing, but it is totally worth the effort of growing it.

4. King’s Mantle (Thunbergia Erecta)

The King’s mantle plant is a herbaceous, perennial, climbing plant that is native to west Africa. It has thick leaves and white flowers with yellow, purple or white tubular flower centers. This plant is pest and disease-free. Other names for the beautiful plant are Bush Clock Vine and Potato Bush.

• Size: This west African beauty can grow 4–6 inches (10–15 centimeter) tall and 5–8 inches (13–20 centimeter) wide.
• Temperature and USDA hardiness zone: Zones 10-11 are the best, however, you can grow it from zone 10 and above.
• Humidity: Ensure that the humidity levels are around 70 percent.
• Light: This plant grows best in full to partial sunlight.
• Soil: Make use of nutrient-rich loam soil for the plant.
• Watering: Water your plant once the soil starts to get dry.

5. Keli Flower (Canna Spp.)

Here is a very beautiful genus of flowering plants. Keli Flowers are perennials or annuals that are native to Central America, South America, Mexico, West Indies, and the Southeastern United States.

They have purple stems and red, orange, pink, yellow, white, or cream flowers with contrasting spots. There are 10 species in this genus and they all grow with their rhizomes. These plants are very easy to grow.

• Size: Canna plants can grow 1.5–8 feet (0.4–2.4 meters) tall and 1.5–6 feet (0.4–1.8 meters) wide depending on the variety.
• Temperature and USDA hardiness zone: Zones 8–10 are best for this plant as they are not too warm or cold.
• Humidity: Maintain average humidity.
• Light: Ensure that the plant is exposed to at least six hours of daily sun.
• Soil: The substrate should be rich in nutrients and moisture.
• Watering: Water the plant so that the substrate is uniformly moist.

6. King Protea (Protea Cynaroides)

These protea plants are plants from South Africa characterized by their long leaves, bright goblet-shaped, long purple, pink, or white petals. This plant produces the largest flower head in its genus. Other names for the King Protea are Honeypot, Giant Protea or King Sugar Bush. Note that it is toxic.

• Size: Depending on the variety, they can grow 6–26 feet (2–7.9 meters) tall.
• Temperature and USDA hardiness zone: Grow the protea plant in zones 9–12.
• Humidity: Average humidity is best.
• Light: Full sun is best for the plant.
• Soil: Make use of sand or loam when growing this plant.
• Watering: Water regularly but once a week when the plant has matured.

7. Kiss-Me-Over-The-Garden-Gate (Persicaria Orientalis)

The Kiss-Me-Over-the-Garden-Gate plant is an heirloom plant that is native to China. It produces pink or purple long and clustered flowers. Its leaves are ovate or ovate-cordate, long-stalked and covered with silky, soft, grey hairs. You surely need this beauty in your garden. You will enjoy its bloom from June to October so long as you grow it at the right temperature.

• Size: This plant can reach 2–8 feet (60–240 centimeters) in height so long as the growing conditions are met.
• Temperature and USDA hardiness zone: Ensure that the plant grows at 64–71 degrees Fahrenheit (18–22 degrees Celsius).
• Humidity: Humidity levels should stay above average humidity.
• Light: Grow the plant in full sun.
• Soil: The soil should be average moist. You can add compost to enrich it.
• Watering: Ensure that the soil remains evenly moist.

8. King’s Spear (Asphodeline Lutea)

This KIng’s Spear plant is an herbaceous perennial plant that is native to western Asia, northern Africa and southeastern Europe. It produces large-bracted, fragrant, yellow flowers with thin petals. This plant has underground stems known as rhizomes. The flowers are very showy and will surely beautify your garden.

• Size: This beautiful plant can grow to reach 3–4 feet (0.9–1.2 meters) tall and 1–2 feet (30–60 centimeters) wide.
• Temperature and USDA hardiness zone: Grow the King’s spear plant from zones 6–9. It is a cool-season plant.
• Humidity: Humidity levels should always be above average humidity.
• Light: This plant needs full sun to grow. 
• Soil: You can grow it with ease in loam soil. The soil should not be heavy. If it is, make a bed.
• Watering: Water the plant two or three times weekly.

9. Kyushu Meadow Rue (Thalictrum Kiusianum)

This Kyushu Meadow Rue is a perennial mat plant with dainty and ferny foliage. It has small showy light-purple flowers and is toxic to people and pets. You can grow this plant in your rock garden. It flowers in spring and summer.

• Size: The plant can reach 6–12 inches (15–30 centimeters) in height and width.
• Temperature and USDA hardiness zone: The cold zones from 6–8 are great for this plant.
• Humidity: So long as you can meet the watering needs of this plant, you do not need to worry about the humidity.
• Light: This meadow rue plant prefers full sun, but you can grow it in partial shade.
• Soil: The soil should stay nutrient-rich and hummusy. Make use of loam.
• Watering: Water the plant so that the soil is evenly moist, yet well-drained.

10. Kiss-Me-Not (Euphorbia Milii)

This is a very popular plant in Africa, especially Madagascar where it is native. The Kiss-Me-Not plant is an evergreen succulent just like cactus plants. It has thorny stems, thick leaves and tiny red or pink flowers. Other names for this beautiful succulent plant include Christ plant, the Crown of Thorns or Christ Thorn. You will enjoy its bloom in spring.

• Size: It can grow 3–6 feet (0.9-1.8 meters) tall and 1–3 feet (30–90 centimeteres) wide.
• Temperature and USDA hardiness zone: Warm zones of 9–12 are optimal for the Milii’s growth.
• Humidity: The humidity levels should stay at average or below average.
• Light: Grow this plant in a spot where it can get six to eight hours of direct sunlight daily.
• Soil: The soil should be one that dries out quickly. Make use of a cactus mix for this plant.
• Watering: This plant has a low watering need. Water it once or twice weekly in summer and spring.

11. Kalanchoe (Widow’s-Thrill)

This is another succulent plant. The kalanchoe plant which is native to Madagascar and tropical Africa is a perennial plant with red, orange, purple, pink, white, or yellow flowers. There are about 125 species in this genus. Please note that this beautiful plant is toxic to pets.

• Size: It can grow 6–18 inches (15–46 centimeters) tall and wide.
• Temperature and USDA hardiness zone: Grow the plant in zones 10–12.
• Humidity: Maintain below-average humidity for this plant.
• Light: Full sun or partial shade is best for the plant. Ensure that it gets around six hours of sunlight daily.
• Soil: Grow the plant in a substrate that can drain water quickly and is airy. Make use of a cactus mix.
• Watering: Only water the plant after the substrate is dry.

12. Kunzea (Kunzea Spp.)

Kunzea is a genus of perennial plants native to Australasia. They have aromatic leaves with purple, blue, white, red, cream, or peach flowers depending on the species. The flowers are small and crowded and characterized by their multiple long stamens. You get to enjoy the beautiful flowers in spring.

• Size: These plants can grow 3–15 feet (0.9–4.5 meters) tall and 3–9 feet (0.9–2.7 meters) wide.
• Temperature and USDA hardiness zone: Even though the plants can tolerate heavy frost, they prefer to grow at 65–70 degrees Fahrenheit (18–21 degrees Celcius).
• Humidity: Maintain average humidity or slightly higher levels.
• Light: Grow the plants so that they can get at least four hours of direct sun each day.
• Soil: The soil should be sandy, loam-based, or sand-loam-based.
• Watering: Water your plants as soon as the soil starts to dry out.

13. Kalmia Latifolia (Mountain Laurel)

This is a beautiful plant with dazzling rose, pink, or white flowers having white or yellow tips and white centers. The Kalmia plant or mountain laurel plant is native to the eastern United States and is a dense and rounded shrub.Other names for the plant include Ivy Bush, Calico Bush, Spoonwood and American Laurel. It blooms in spring.

• Size: The mountain laurel plant can reach 5–15 feet tall and 5–15 feet (1.5–4.5 meters).
• Temperature and USDA hardiness zone: The best zones to grow this beauty are zones 4a–9a.
• Humidity: Humidity levels above 60 percent are best for this plant.
• Light: The mountain laurel plant prefers to grow in partial shade so that it does not get sunburnt.
• Soil: Grow the plant in moist but well-drained soils. You can grow them in loam soil.
• Watering: Water them before the soil becomes dry.

14. Knautia Arvensis (Field Scabious)

Knautia Arvensis plants or field scabious plants are herbaceous perennial plants native to Europe and temperate Asia. They produce purple flowers on long stalks and compound leaves (the leaves have leaflets). The flowers of this field scabious make great cut flowers. You can also grow this plant as a border plant.

• Size: The Knautia Arvensis can reach 9.8 inches (25 centimeter) in height and 39.4 inches (1 meter) in width.
• Temperature and USDA hardiness zone: Grow the plant at around 65 degrees Fahrenheit (18 degrees Celsius).
• Humidity: Humidity levels around average are beneficial.
• Light: The plant prefers full or partial shade. Ensure that it does not get sunburnt.
• Soil: Grow the Knautia Arvensis in nutrient-rich and lightweight soil.
• Watering: Water this plant once or twice weekly in the growing season.

15. Knautia Macedonica (Macedonian Scabious)

The Kanutia Macedonica or Macedonian scabious is a perennial plant that is native to Bulgaria, Albania, North Macedonia, Greece, and Romania. It produces pink flowers on long stalks and the leaves are compounded. This is truly a beautiful plant to keep in your garden. Don’t you think?

• Size: Macedonian scabious plants can grow to reach 1–3 feet (30–90 centimeters) tall and 1–2 feet (30–60 centimeters) wide.
• Temperature and USDA hardiness zone: You can grow this plant with ease in zones 5–9.
• Humidity: Humidity levels above 50 percent are best for this plant.
• Light: Grow the Macedonian scabious in full or partial shade.
• Soil: The soil should be moderately fertile and alkaline.
• Watering: Water the soil so that it stays evenly moist. It should be well-drained.

Conclusion

Flowers that start with K are truly unique and beautiful. They are easy to grow so long as you grow them in the right conditions, so you want to check the growing conditions of each flower before you make your choice.

Flowers such as Kunzea and Keli plants are not just beautiful, they are also hardy and can grow in different regions, so you want to consider starting with them. Which flower will you like to start with?

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