Achilleas or yarrows are pretty hardy perennials producing flat-topped heads of small, colourful flowers above grey to green ferny foliage. Very attractive to pollinators, they look especially fantastic planted at the back of the sunny border or the wild flower/rock garden. For added interest, try mixing them with other perennial plants such as heleniums, rudbeckias or spiky plants like eryngiums or veronicas. They make excellent cut flowers, and are excellent for drying in winter.
Plant in moist, well-drained soil in full sun. Although achilleas will tolerate most soil conditions and will withstand dry conditions, they may need staking if planted in exposed areas.
Achilleas are supplied in 9 cm pots. Always unpack and plant on arrival.
Potential problems, pests and diseases:
- Aphids: these sap-eating insects can weaken plants and spread viruses. Whenever possible, pick off by hand using gloves.
- Powdery mildews: these fungal diseases usually caused by planting in the shade or by poor air circulation can be seen in the form of white, powdery coating on the leaves. Cut off any infected material before disinfecting your scissors.