Butterfly Pea Seeds, Thai Double Sky Blue
A close-up view of Thai Double Sky Blue Butterfly Pea blooms on a wood background.
Butterfly Pea Seeds, Thai Double Sky Blue
A close-up view of Thai Double Sky Blue Butterfly Pea blooms on a wood background.

Butterfly Pea Seeds,
Thai Double Sky Blue

46 Reviews#HB324 · 10 seeds
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Description

(Clitoria ternatea). This rare sky-blue selection offers a softer, more tranquil expression of the butterfly pea, with powdery double blooms that cool the look of the summer garden. Vigorous vines quickly climb and spread, creating a peaceful wall of color on trellises and fences. The flowers can be used for tea and natural dye, adding both function and beauty. Easy to grow and heat loving, it’s a perfect choice for gardeners seeking a calm, refreshing visual tone with practical use.

Plant Details

Botanical Name
Clitoria ternatea
Life Cycle
Perennial in zones 10–11, grows as an annual in cooler climates
Growth Habit
Climbing
Sun Requirement
Full sun
Days to Germinate
7–21
Days to Maturity
75–90
Planting Depth
1 in.
Plant Spacing
6–12 in.
Ideal Temperature
70–90°F
Frost Hardy
No

Growing Guide

When to Grow

Start indoors 8-10 weeks before final spring frost or plant Thai Double Sky Blue seeds after the final frost date once soil temperatures consistently stay above 65°F. It’s ideal for late spring and early summer planting in most climates. In frost-free zones, start earlier or grow year-round. If you’re not sure how to find your first and last frost dates, consult our blog post 'Our Experts Answer Questions, Share Resources.'

How to Sow and Plant

To enhance germination, soak seeds in warm water for 12–24 hours before sowing. Plant them 1 inch deep in moist, well-drained soil in a location receiving at least 6 hours of sunlight. Space plants 6 to 12 inches apart and provide a vertical support structure at planting time to encourage early vining growth.

How to Grow

Maintain even moisture, especially during dry spells, and mulch around plants to retain soil moisture and reduce weed competition. Encourage continuous blooming by regularly harvesting flowers and removing spent blooms. Light pruning can manage growth and shape, especially in small garden spaces. Feed occasionally with compost for additional vigor.

How to Save Seeds

  • Let pods to fully mature and dry on the vine before harvesting
  • Harvest when pods are brown and beginning to crack open
  • Remove seeds from pods and discard any that are moldy or damaged
  • Let seeds air-dry for a week in a shaded, well-ventilated space
  • Store in a labeled paper envelope or glass jar in a cool, dark place

FAQ

What makes Thai Double Sky Blue butterfly pea different from other varieties?

This variety features unique double-layered petals in a soft sky blue tone, giving it a fuller, more ornamental bloom. It’s especially popular for floral arrangements and decorative culinary uses.

Can Thai Double Sky Blue butterfly pea be used for tea or dye like the single blue types?

Yes, although its color is slightly lighter, the petals still contain anthocyanins that create a vibrant blue tea. The blossoms can also be used as natural food coloring or pH-reactive dye.

Browse our full range of butterfly pea seeds.

Customer reviews

4 / 5 6 Reviews

What gardeners are saying

  • Soft ruffled blue: Delicate layered blooms; some came paler than pictured.

  • Tea garden keeper: A tea-garden favorite; blooms can be saved for a mild tea.

  • Patient start: Slow for months, then vines and blooms take off in cooler weather.

  • Growing tips: Scarify and soak seeds; germination is spotty and full sun stunts it.

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