Astilbe, Fanal Overview Category: Perennials Common Name: Astilbe, Fanal Botanical Name: Astilbe x arendsii 'Fanal' Sun Exposure: Full shade to part sun Height: 24-30 in. Spread: 18-24 in. See notes | Back to perennials Notes Brilliant carmine-red flowers in June and July borne on spikes. Foliage is dark red-green. Best in groups of three, in a perennial border or mass planted. Best in deep, rich soil with good moisture.