If you have space for tall perennials then the genus Silphium could be a consideration for your garden.

The following images were taken at the Wildegoose nursery , which is located in Shropshire here in the UK. http://www.wildegoosenursery.co.uk

Silphium perfoliatum

Silphium perfoliatum is a member of the Asteracea family, and native to eastern and central North America.

This is an extremely tall perennial, which can reach in excess of 2.5m. To achieve this lofty height your ground conditions do need to be moist and well drained. This really is a low maintenance perennial, in that it is self supporting and will grow in full sun or partial shade, and in a range of soil conditions from acidic to alkaline.

There are no specific pest and disease relating to this perennial.

On a floral note sulphur yellow daisy like flowers are prominent through the summer and autumn months. Don’t cut the stems back over winter, as they turn a deep black colour, and make a really bold architectural statement. In addition by leaving the stems intact, the seed heads provide a great food source for birds.

Their height often finds them at the back of a border, however if you are feeling adventurous , why not consider planting right at the front, so that they tower over you. I know what my planting choice would be …

Silphium mohrii

Silphium mohrii, can reach up to 2 metes in height, and is a native to the North American prairies . The pale yellow flowers last though summer and autumn, I believe they would make a fantastic addition to any garden that can provide a well drained soil and a sunny position . There are no specific pest and disease problems with this plant.

I particularly enjoyed photographing this perennial as it focused my eye on the lance shaped foliage and the visually striking hairy stems .