Alium - wit

White alliums - flower in late spring early summer. They do attract bees, so best for the back of the garden, away from your terrace

Gaura Lindheimeri 'Whirling Butterflies'

Gaura (G. lindheimeri) White flowers cluster like butterflies atop tall spikes on these airy to plants 'Whirling Butterflies' (to 3 feet tall), with white flowers drought resistant

Gaura Lindheimeri 'Whirling Butterflies'

sommarljus Gaura lindheimeri (Wand flower, White gaura, Butterfly gaura) - Fine Gardening Plant Guide NEXT SPRING

Verbena bonariensis

Verbena bonariensis- An annual worth adding as a back drop in your perennial garden. Long narrow stocks with a butterfly attracting purple flower at the tips. Will re-seed but easy to pull and transplant if you want to.