Sunflowers' full heads of bloom follow the sun, an attribute called heliotropism. Be sure to plant them where they receive a full day of sun, spaced well apart. Tolerant of differing soils, they also do well in somewhat droughty conditions. Water infrequently but deeply once established to encourage vigorous, deeply rooted plants that can withstand summer storms. Plant them in the back to mid-border in cottage gardens, cutting gardens, and pollinator gardens, where they attract butterflies, bees, and birds.