Great for tough dry conditions, but happy in good soil too! I love this plant. These second year plants will be in a hurry to form a nice clump and start throwing out rigid blue stems of thistle like flowers. They're only a little prickly, not unlike myself.
In the cutting garden, cut them when they just turn blue. If you keep the stems cut they will re-flower off and on all season. Eryngium also dries well.
Height: 36.0-40.0 Inches
Spread: 8.0-12.0 Inches
Hardiness Zones: 4,5,6,7,8
Flower Color: Blue shades
Foliage Color: Green shades
Sunlight: Full Sun (> 6 hrs. Direct Sun)
Water Requirements: Low Water Needs, Average Water Needs
Soil Quality: Poor Soil Quality, Average Soil Quality
Soil Chemistry: Neutral Soil (pH = 7.0), Alkaline Soil (pH > 7.0)
Photos courtesy of Walters Gardens