Asclepias tuberosa

Eryngiums are very robust plants that grow well in full sun and can be tolerant to drought. The plants bear spikey cone-shaped flowerheads in blue and silver-grey tones. Spent flowerheads give winter interest to your border, so don’t cut them back straight away.

Tall blue flower spikes sit on a bed of yellow-green scented foliage. The flower spikes can reach up to 90cm and attract pollinators with their sweet fragrance. Flowers appear in mid-summer which makes thnis plant perfect for adding colour to your garden for later in the season. Agastache can be planted in containers for the first season and then be planted into your garden border for the following seasons.

Cobalt blue flowers that resemble butterflies emerge in summer and last all the way into autumn. The plants can cope with light frosts but might need extra protection during extreme cold temperatures. Cut back in late summer to encourage a second flush in autumn and then trim the following year in spring to strenghten new growth.