Verbascum chaixii "Album"
This short-lived perennial verbascum, also known as nettle-leaved mullein, produces tall spires covered in white flowers with magenta centres that are held high above dark green rosettes of foliage. Reaches 1m+ and enjoys full sun to part shade in well-drained soil. It doesn't require staking and gently self-seeds in the garden. I love to pair it with magenta/pink coloured salvias that help bring out the magenta centres of the verbascum. Cut the flowering stem back once finished and you may be able to get a repeat flowering in late summer.