25 Double Blue Clematis Seeds | Perennial Flowering Vine, Gorgeous Large Blue Blooms

Stunning double blue clematis flowers add elegance to any garden. This perennial climbing vine produces an abundance of large, layered, sapphire-blue blossoms with a delicate, frilled appearance. Perfect for creating vertical interest on trellises, arbors, fences, and pergolas.

Hardy in USDA zones 4-9, this clematis flourishes in full sun to partial shade. In hotter regions, provide afternoon shade to protect roots. Plant in moist, well-drained soil enriched with organic matter. Mulch around the base to keep roots cool and retain moisture.

Seeds benefit from cold stratification. For best results, sow seeds indoors in late winter after a cold-moist period. Surface sow and keep evenly moist until germination in 30-90 days. Transplant seedlings outdoors after the last frost. Space plants 18-24 inches apart.

Once established, vines can climb 10-12 feet. Blooms appear in late spring to early summer, with occasional rebloom in fall. Prune lightly after flowering to maintain shape. Water deeply once a week, more during dry spells. Fertilize in spring with a balanced formula.

This long-lived heirloom variety attracts pollinators and makes a breathtaking cut flower. Ideal for cottage gardens, romantic landscapes, and container growing with a support.