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Agastache - Care Guide
Caring for Agastache
We offer several different species and forms of this attractive perennial which is one of those popular herbaceous plants which features in many mixed borders. Agastache have an erect, upright habit with greyish-green leaves in opposite pairs and whorls of long lasting tubular flowers. Their leaves are aromatic.
They thrive in full sun in fertile soil and especially prepared soil with added leaf mould, compost or dung. Powdery mildew can affect the leaves but this is usually only after warm wet periods and usually only after the plants have more or less finished flowering so it is seldom much to worry about. Agastache root easily from semi ripe cuttings taken in late summer. They should then be overwintered under cover even if potted on before the end of autumn.
A. foeniculum ‘Blue Fortune’ and ‘Alabaster’ flower from July to September and grow 3ft or more including the flower spikes. Staking is probably unnecessary for individual clumps. The leaves are anise scented.
A. mexicana ‘Red Fortune’ is not as hardy as other Agastache varieties. It also grows to around 3ft in height and has reddish-pink whorls of flowers. It is a Mexican species so taking cuttings to ensure its survival over winter is more critical.
A. rugosa ‘Little Adder’ has compact lavender blue flowers and is the tallest growing of the Agastache we offer and probably the last into flower in August. Even in pots in the nursery it is threatening 4ft in height so expect more in the garden.