The pewter-blue stems of Eryngium ‘Big Blue’ carry glossy green, spiky leaves that make the perfect foil for bouquets of equally spiky, silvery, cobalt-blue blossoms. Surrounded by flat spiny bracts, the flower heads are reminiscent of a thistle, prized for fresh and dried arrangements. These distinctive plants make great specimens and add interest to sunny borders and mixed beds and intermingle well with other sun loving perennials.
×
Quantity Calculator
Details
Hardiness Zone:
4
Blossom Color:
Blue to Blue Gray
Growth Habit:
Clump Forming
Max Height:
3'
Texture:
Medium Texture
Recommended Spacing:
2' to 2½'
We sell this plant in these containers:
#1 Pot
Special Characteristics
Cuttings
Seasonal Effect
Moderate Area
Drought Tolerant
Butterflies
Bees
Large Area
Deer Resistant
Sandy Soil Tolerant
Features
Pewter blue stems carry glossy green, spiky leaves, topped with bouquets of equally spikey, silvery, cobalt-blue blossoms.
Landscape Value
Distinctive plants make great specimens and add interest to sunny borders and mixed beds.
Care
Watering:
'Big Blue' Sea Holly is very drought tolerant and typically only needs watering during the hottest days of summer.
Fertilizing:
'Big Blue' Sea Holly needs little fertilizer, but benefits from a single springtime or fall topdressing (about 1 inch deep) of organic compost or well rotted leaves. Alternatively, a springtime application of a slow release fertilizer with a 3-1-2 ratio (such as a 15-5-10) can be applied at a rate of about 10 pounds per 1000 square feet.
Pruning:
'Big Blue' Sea Holly should be enjoyed all winter long, then, during early April before it begins to grow again, it should be pruned or mowed back to ground level.
