25 Flowers That Start With The Letter J

There are beautiful flowers for every letter of the alphabet. In this article, we have a list of plants with flowers that start with J and key information about each one. Let's take a look at all the different J plants.

Flowers That Start With J

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1. Jaborosa

jaborosa

  • Scientific Name: Jaborosa integrifolia
  • Sun: Full sun, partial shade
  • Water: Keep soil moist
  • Size: Up to 6 inches (15 centimeters)
  • Lowest Temperature: 10°F (-12°C)
  • Toxicity: High
  • Colors: White

The jaborosa is part of the nightshade family and has been used for medicinal purposes. However, it's highly toxic if consumed.

2. Jacaranda

jacaranda

  • Scientific Name: Jacaranda mimosifolia
  • Sun: Full sun
  • Water: Keep soil moist
  • Size: 25-50 feet (7-15 meters)
  • Lowest Temperature: 30°F (-1.1°C)
  • Toxicity: None
  • Colors: Purple

The Jacaranda is a tree known as the black poui that grows beautiful purple flowers. They can be grown indoors, but they likely won't flower.

3. Jack-in-the-Pulpit

jack-in-the-pulpit

  • Scientific Name: Arisaema triphyllum
  • Sun: Partial shade, deep shade
  • Water: Keep soil moist or occasionally wet
  • Size: 1-2 feet (30-60 centimeters)
  • Lowest Temperature: -30°F (-34°C)
  • Toxicity: High, toxic if eaten
  • Colors: Green, purple, lavender, white, brown, copper

This flower grows a fruit that looks like a flower. It shouldn't be eaten since the entire plant is highly toxic.

4. Jacob's Ladder

jacob's ladder

  • Scientific Name: Polemonium caeruleum
  • Sun: Partial shade, deep shade
  • Water: Keep soil moist
  • Size: 1.5-2 feet (45-60 centimeters)
  • Lowest Temperature: -30°F (-34°C)
  • Toxicity: None
  • Colors: Blue

Jacob's ladder may benefit from afternoon shade in hot climates to prevent the foliage from burning. This plant is self-seeding, so it will easily spread in the garden if given the right conditions.

5. Jade Vine

jade vine

  • Scientific Name: Strongylodon macrobotrys
  • Sun: Full sun, partial shade
  • Water: Keep soil moist
  • Size: 30-50 feet (9-15 meters)
  • Lowest Temperature: 30°F (-1.1°C)
  • Toxicity: None
  • Colors: Pink, green

Jade vine is a tropical plant that can be grown indoors in cooler climates.

6. Jamesia Americana (Waxflower)

jamesia americana

  • Scientific Name: Jamesia americana
  • Sun: Full sun
  • Water: Allow soil to dry between waterings, drought tolerant
  • Size: 3-6 feet (0.91-1.8 meters)
  • Lowest Temperature: -25°F (-31.6°C)
  • Toxicity: None
  • Colors: White

The waxflower is a flowering shrub that's native to to the hot and dry southwestern United States. It should be grown in a container in colder climates and brought inside during the winter.

7. Japanese Anemone

japanese anemone

  • Scientific Name: Eriocapitella hybrida
  • Sun: Full sun, partial shade, dappled shade
  • Water: Keep soil mostly moist
  • Size: 3-4 feet (0.91-1 meters)
  • Lowest Temperature: -30°F (-34°C)
  • Toxicity: High if eaten in large quantities or if it touches the skin
  • Colors: Pink, red, burgundy, yellow, gold, green, purple, lavender, white

This flower can cause skin irritation if you touch it, but it grows beautiful blooms in the late summer and throughout fall.

8. Japanese Cobra Lily

japanese cobra lily

  • Scientific Name: Arisaema sikokianum
  • Sun: Partial shade, deep shade
  • Water: Keep soil moist or wet
  • Size: 1.5-2 feet (45-60 centimeters)
  • Lowest Temperature: -20°F (-28°C)
  • Toxicity: High
  • Colors: Green, purple, white

This plant is related to the jack-in-the-pulpit and looks similar, but they're two different flowers.

9. Japanese Iris

japanese iris

  • Scientific Name: Iris ensata
  • Sun: Full sun, partial shade
  • Water: Keep soil moist, tolerant of standing water in the warm months
  • Size: 2-4 feet (60-121 centimeters)
  • Lowest Temperature: -30°F (-34°C)
  • Toxicity: Low
  • Colors: Pink, yellow, gold, blue, purple, lavender, white

10. Japanese Kerria

japanese kerria

  • Scientific Name: Kerria japonica
  • Sun: Partial shade, dappled shade, deep shade
  • Water: Allow soil to dry slightly between waterings
  • Size: 3-7 feet (0.91-2.1 meters)
  • Lowest Temperature: -30°F (-34°C)
  • Toxicity: None
  • Colors: Yellow, gold

This is a shrub that grows a lot of flowers on it. It will work well as a border or a point of interest in a landscape.

11. Japanese Lantern

japanese lantern

  • Scientific Name: Physalis alkekengi
  • Sun: Full sun
  • Water: Keep soil moist
  • Size: 1-2 feet (30-60 centimeters)
  • Lowest Temperature: -35°F (-37.2°C)
  • Toxicity: None
  • Colors: White

This plant may spread aggressively if it has the space and may require frequent pruning.

12. Japanese Pachysandra

japanese pachysandra

  • Scientific Name: Pachysandra terminalis
  • Sun: Partial shade, deep shade
  • Water: Keep soil moist, drought tolerant
  • Size: 6-12 inches (15-30 centimeters)
  • Lowest Temperature: -30°F (-34°C)
  • Toxicity: None
  • Colors: White

This is a low-laying ground cover that grows small flowers.

13. Jasione

jasione

  • Scientific Name: Jasione
  • Sun: Full sun, partial shade
  • Water: Keep soil moist
  • Size: 10-14 inches (25-35 centimeters)
  • Lowest Temperature: -20°F (-28°C)
  • Toxicity: None
  • Colors: Blue, white

14. Jasmine

jasmine

  • Scientific Name: Jasminum officinale
  • Sun: Full sun, partial shade
  • Water: Keep soil moist, occasionally dry
  • Size: Vines up to 40 feet (12 meters)
  • Lowest Temperature: 5°F (-15°C)
  • Toxicity: None
  • Colors: White

Jasmine can be grown indoors in bright light all year long or during winter in cold climates.

15. Jerusalem Artichoke

jerusalem artichoke

  • Scientific Name: Helianthus tuberosus
  • Sun: Full sun, partial shade
  • Water: Keep soil slightly dry, drought tolerance
  • Size: 6-10 feet (1.8-3 meters)
  • Lowest Temperature: -35°F (-37.2°C)
  • Toxicity: None
  • Colors: Yellow, gold

The Jerusalem artichoke is in the sunflower family and has an edible root.

16. Jerusalem Sage

jerusalem sage

  • Scientific Name: Phlomis fruticosa
  • Sun: Full sun, partial shade
  • Water: Can tolerate dry or moist soil
  • Size: 2-4 feet (60-121 centimeters)
  • Lowest Temperature: 5°F (-15°C)
  • Toxicity: None
  • Colors: Yellow, gold

Jerusalem sage is a shrub that can spread out a a bit wider than its height.

17. Jessamine

jessamine

  • Scientific Name: Cestrum
  • Sun: Full sun, partial shade
  • Water: Keep soil moist
  • Size: 2-6 feet (0.6-1.8 meters)
  • Lowest Temperature: -50°F (-45.5°C)
  • Toxicity: Low
  • Colors: Red, burgundy, purple, lavender, white

This plant grows berries after the flowers but they shouldn't be eaten because they're toxic.

18. Jewel Orchid

jewel orchid

  • Scientific Name: Ludisia discolor
  • Sun: Part shade
  • Water: Keep soil moist
  • Size: 3-18 inches (7-45 centimeters)
  • Lowest Temperature: 40°F (4.4°C)
  • Toxicity: None
  • Colors: Red, green, white

19. Jewelweed

jewelweed

  • Scientific Name: Impatiens capensis
  • Sun: Partial shade, dappled shade, deep shade
  • Water: Keep soil moist and occasionally wet
  • Size: 3-5 feet (0.91-1.5 meters)
  • Lowest Temperature: -50°F (-45.5°C)
  • Toxicity: None
  • Colors: Orange, yellow, gold

20. Joe Pye Weed

joe pye weed

  • Scientific Name: Eutrochium purpureum
  • Sun: Full sun, partial shade
  • Water: Keep soil moist and occasionally wet
  • Size: 2-5 feet (0.6-1.5 meters)
  • Lowest Temperature: -30°F (-34°C)
  • Toxicity: None
  • Colors: Pink

This flower has a sweet vanilla scent. Although it likes moisture, it can withstand a bit of dry soil.

21. Johnny Jump Ups

johnny jump ups

  • Scientific Name: Viola tricolor
  • Sun: Full sun, partial shade
  • Water: Keep soil moist
  • Size: 3-10 inches (7-25 centimeters)
  • Lowest Temperature: -50°F (-45.5°C)
  • Toxicity: Very low, only toxic if eaten in large quantities
  • Colors: Orange, yellow, gold, blue, purple, lavender, cream, tan, white, variegated

22. Jonquil (Daffodil)

jonquil

  • Scientific Name: Narcissus jonquilla
  • Sun: Full sun, partial shade
  • Water: Keep soil moist
  • Size: 6-18 inches (15-45 centimeters)
  • Lowest Temperature: -30°F (-34°C)
  • Toxicity: Low
  • Colors: Yellow, gold

23. Joseph's Coat

joseph's coat

  • Scientific Name: Amaranthus tricolor
  • Sun: Full sun, partial shade, needs afternoon shade
  • Water: Keep soil moist
  • Size: 1.5-5 feet (0.3-1.5 meters)
  • Lowest Temperature: -50°F (-45.5°C)
  • Toxicity: None
  • Colors: Red, yellow, gold, green

This plant's leaves are more showy than its flowers. The red and yellow leaves will stand out like a flower in a flower bed.

24. Jumbie Bean

jumbie bean

  • Scientific Name: Leucaena leucocephala
  • Sun: Full sun
  • Water: Tolerant to most conditions ranging from dry to wet soils
  • Size: Up to 20 feet (6 meters)
  • Lowest Temperature: 40°F (4.4°C)
  • Toxicity: Medium, seeds can be eaten occasionally if cooked
  • Colors: White

This is a flowering tree that can be invasive, but it provides shade, fuel, fodder, and improves soil, which is often why it's grown despite the invasive tendencies.

25. Justicia (Shrimp Plant)

justicia

  • Scientific Name: Phlogacanthus guttatus, formerly Justicia guttata
  • Sun: Full sun, partial shade
  • Water: Keep soil moist
  • Size: 1-3 feet (30-91 centimeters)
  • Lowest Temperature: 20°F (-6°C)
  • Toxicity: None
  • Colors: Pink, red, orange, yellow, gold, green, white