Grey Owl JuniperGrey Owl' is the very best of the grey foliage junipers we know of. It's soft grey color is soothing in the garden and is perfect for mass planting on hot, dry and sunny banks or in island beds. Space plants about 4' apart to grow together within just 2 3 years. We've planted 'Grey Owl' all along the front of the Nursery. We trim them once a year, in March, with gas powered hedge trimmers to maintain them at 3' tall by 5' wide.