A magnificent Macaronesian perennial species forming mighty plants with impressively large vivid-green, deeply dissected foliage. Huge heads of magenta-pink flowers in early summer. Height to 120cm. Sun or part shade in well drained unpampered soil, it resents rich living. Evergreen, some foliage can turn vivid-red in winter. Requires some protection in very cold areas, but generally pretty hardy especially if grown hard. The giant Herb Robert to grow if you aren't mild enough for G. maderense.