I have an unreasonable affinity for painful plants. These aren't pokey on the same level as thistles, but perhaps best not to prance through them in your bikini. Jeans will do just fine.
The foliage and flowers alike add structure to your perennial garden, and the glowing orbs of blue make me giddy. The bees love them. They cut well, and even dry well. They will lightly reseed around the garden, but in a charming way.
Height: 3.0-4.0 Feet
Spread: 2.0 Feet
Hardiness Zones: 3,4,5,6,7,8
Flower Color: Blue shades
Foliage Color: Green shades
Sunlight: Full Sun (> 6 hrs. Direct Sun)Part Shade (4-6 hrs. Direct Sun)
Water Requirements: Low Water NeedsAverage Water Needs
Soil Quality: Poor Soil QualityAverage Soil Quality
Soil Chemistry: Acidic Soil (pH < 7.0), Neutral Soil (pH = 7.0), Alkaline Soil (pH > 7.0)
Bloomtime: Early Summer, Midsummer, Late Summer
Photos courtesy of Walters Gardens