Achillea millefolium ‘Cassis’

Plant of the month: August

Achillea millefolium ‘Cassis’ is a member of the Asteraceae family and can be found in the Grass Garden.

Easy to grow from seed, this short-lived perennial has the most glorious flat heads of crimson flowers.

It can reach up to 60cm in height and needs to be mass planted, as the foliage can be lost in the background.

To ensure the flowers keep coming, be sure to deadhead regularly. To keep it thriving, it should be divided every couple of years.

The Achillea flourishes in light sandy soil and in full sun – the front of a border is ideal.

There is another achillea in the Grass Garden close to the Bamboo Maze called the white Achillea millefolium and is the parent of numerous other achilleas. Native to Europe, it is a tough and invasive plant, often found on lawns and roadsides.

Bees love Achilleas – there being hundreds of single flowers for them to visit!