The Gypsophila genus contains about 100 species, a number of which are referred to as Baby's Breath. The dried Baby's Breath flowers commonly found in floral arrangements are from the perennial G. paniculata, while G. elegans and G. muralis are annuals.
In contrast to perennials, the flowers of the annual gypsophilas are small and solitary. G. muralis — commonly known as Annual Gypsophila or Low Baby's Breath — is distinguished from G. elegans by its smaller stature, greater number of flowers, and its mounded rather than erect habit. G. muralis also prefers soil that is less limy than most Gypsophila species.
Aside from its arrangement use, Baby's Breath is excellent in borders, rock gardens, and — little surprise — planted among roses. Baby's Breath is best grown in groups. Space plants about 8 inches apart. G. muralis can be seeded directly, or you can start indoors and plant as spring begins to warm.
Baby's Breath loves sunlight. Rich, light, well-drained soils are best. Baby's Breath grows quickly and will require watering during dry spells. As you'd expect from its genus name, Baby's Breath is gypsum loving and prefers limestone soils.
Baby's Breath is useful in the garden for its combination of strength and beauty. Its small, gauzy white flowers combine well with brighter colors, yet Baby's Breath is hardy enough to endure in sometimes dry or poor soil. This quality makes it well suited for edging or garden borders.
Baby's Breath should be pulled up once its flowers fade. These cut flowers can be dried and used decoratively during the winter.