Plant Profile: Rosa palustris

Rosa palustris, commonly known as swamp rose, is a deciduous shrub characterized by its upright growth and arching branches, typically reaching heights and widths of 3 to 6 feet. This species thrives in wet environments such as swamps, marshes, ditches, and along stream banks, spanning a range from Nova Scotia to Ontario and Minnesota, extending down to Florida and Louisiana. The shrub features reddish stems adorned with curved prickles and is covered in pinnately compound leaves that are medium to dark green. Each leaf usually consists of 7 broad-elliptic leaflets, though occasionally there are 5 or, rarely, 9. These leaflets, which can grow up to 2.5 inches long, are finely serrated and pointed at both ends. From late spring to early summer (June to July), the plant produces fragrant, single pink flowers, about 2 inches in diameter, with striking yellow stamens at their centers. Following the blooming period, pea-sized red hips, measuring up to half an inch, develop, and the leaves often transform into vibrant shades of red in the fall.

For optimal growth, swamp rose prefers acidic, organically rich, and consistently moist soils in full sunlight. While it can tolerate light shade, the best flowering and resistance to diseases are typically observed in full sun conditions. Although the plant does not thrive in standing water, it can withstand occasional seasonal flooding. Ensuring good air circulation is essential for robust growth and helps mitigate foliar diseases. Pruning should be done as necessary in late winter, and the plants propagate slowly through suckering.

Seasons of Interest:
- Leaves: Fall
- Blooms: Summer to late summer
- Fruit: Fall

In terms of pests and diseases, swamp rose is generally resilient against the common threats that affect many hybrid roses. However, potential issues for roses in general may include black spot, powdery mildew, and rust, while insect pests could consist of aphids, beetles, borers, scale, thrips, rose midges, and leafhoppers. Spider mites may also occasionally appear.

Form: Upright