Monch' is an upright, bushy herbaceous perennial with ovate, rough, dark green leaves and loose clusters of yellow-centred, lavender-blue flowers from late summer to early autumn. Cut back in late autumn. Aster x frikartii 'Monch' (Frikart's aster 'Monch') will reach a height of 1m and a spread of 0.5m after 2-5 years. Zone 5.