Stachys 'Hummelo' Purple - Hardy plantWant to attract more bees and butterflies to your garden? Lamb's ear is perfect for that. Its purple flowers are very popular with bees and butterflies. The hardy plant likes to be placed in a border, but also does well in a pot on the patio or balcony. It will flower from July to August. Place it in partial shade or sun as that's where it grows best. Tip: Take the flowers into your home! Cut some flowers and arrange them in a vase.