Balsam (Rose Balsam)

Balsam (Impatiens balsamina), commonly referred to as Rose Balsam or Touch-me-not, is a charming, old-fashioned annual belonging to the Balsaminaceae family. Native to South Asia and Southeast Asia, it has been a beloved staple in Victorian cottage gardens for over a century. It is highly valued for its ability to produce vibrant, continuous color throughout the sweltering summer months, particularly in shaded areas where many other blooming annuals struggle to survive.

Identification of Balsam is distinct due to its growth habit. The plant produces thick, fleshy, almost translucent pale-green stems that grow rigidly upright, reaching 1 to 2.5 feet tall. The lance-shaped, sharply toothed leaves are arranged spirally. The cup-shaped, intensely colored flowers (ranging from pink, red, and purple to white) do not grow on long stalks; instead, they nestle tightly into the leaf axils directly against the main stem, resembling miniature camellias or roses.

The floral formula is % ⚥ K3 C5 A(5) G(5). It features a highly irregular (strongly zygomorphic), bisexual flower. It has 3 sepals (with the lower sepal forming a prominent, nectar-bearing spur), 5 petals, 5 stamens that are fused together around the stigma, and a superior ovary of 5 fused carpels.

Balsam is famous for its unique seed dispersal mechanism, giving it the nickname 'Touch-me-not'. As the fuzzy, green seed pods mature, they become highly turgid. The slightest touch, breeze, or raindrop will cause the pod to explode violently, catapulting its seeds several feet away. Because of this, Balsam aggressively self-seeds and will return to the garden year after year.

Growing Balsam requires mimicking a moist forest edge. It thrives in partial shade to dappled sunlight; intense, direct afternoon sun will quickly scorch the leaves and wilt the fleshy stems. It demands rich, consistently moist, well-draining soil. It is highly frost-sensitive and will die immediately upon the first freeze.

Regarding toxicity, Balsam is technically NON-TOXIC to humans and pets, making it generally safe for gardens. However, it is important to note that the plant contains high levels of soluble calcium oxalates. While a dog or cat chewing on a leaf will not be poisoned, consuming large quantities of the foliage can cause gastrointestinal upset or contribute to kidney stones over time in livestock.

It is closely related to the common garden Impatiens (Impatiens walleriana), but Balsam grows tall and upright with flowers clinging to the stem, whereas standard Impatiens form low, spreading mounds with flowers on the outer canopy. Explore more shade lovers in our Flower Identifier.