Product Description

Overview

Blue Eryngium Planum Flower Seeds grow into bold, architectural perennial plants admired for their metallic blue cone-shaped flower heads and spiky silver-blue foliage. Commonly known as Blue Sea Holly, this striking ornamental is perfect for modern gardens, dry landscapes, rock gardens, and floral arrangements. With excellent heat and drought tolerance, Blue Eryngium adds dramatic texture, color contrast, and long-lasting beauty to any sunny garden.

Features

• Premium-quality, non-GMO Blue Eryngium Planum Flower Seeds

• Produces striking metallic blue, thistle-like blooms

• Ideal for borders, rock gardens, dry landscapes, and pots

• Strong germination with hardy perennial growth

• Excellent heat and drought tolerance once established

• Unique architectural texture for modern garden designs

• Excellent for fresh and dried flower arrangements

• Low-maintenance and beginner-friendly flowering perennial

Specifications

• Plant Type: Perennial

• Common Name: Blue Eryngium, Blue Sea Holly

• Scientific Name: Eryngium planum

• Variety: Blue Flowering Type

• GMO Status: Non-GMO

• Heirloom: Yes

• Growth Season: Spring–summer

• USDA Zones: 4–9

• Sun Exposure: Full sun

• Soil Type: Well-drained, sandy to poor soil

• Bloom Time: Mid-summer to early autumn

• Plant Height: 24–36 inches

• Spacing: 12–18 inches

• Watering: Low (highly drought-tolerant once established)

Planting Guide

• Sowing Method: Start indoors or direct sow outdoors

• Seed Preparation: Cold stratification for 3–4 weeks recommended

• Sowing Depth: Surface sow; lightly press into soil

• Germination Time: 14–28 days

• Ideal Temperature: 15–22°C

• Transplanting: Transplant outdoors once seedlings are strong and frost risk has passed