Columbine Meadow Rue (Thalictrum) is an ethereal perennial blooming with fluffy lilac-purple flowers in early summer. This low care Old World perennial is grown for both its flowers and attractive foliage. Grow Columbine Meadow Rue in sunny and partially shaded areas. In the western US where the sun is much stronger than in the hazy skies of the eastern US, plant it in partial shade so not to scorch the delicate foliage. It likes a compost-enriched garden loam with medium to moist growing conditions. It's a wonderful companion plant for Sedge (Carex) and Kashmir Sage (Phlomis cashmeriana).