Swamp rose is the native rose for wet ground. It grows naturally in marshes, swamps, stream banks and pond edges across eastern North America, and it tolerates standing water for long periods, which almost no other rose does. Fragrant, single, pink flowers appear in early to midsummer, a little later than most wild roses, followed by small red hips and orange-red fall colour.
The shrub grows 4 to 7 feet tall and spreads slowly by suckers. Use it in a rain garden, a low spot that stays soggy, or along a pond or ditch. It also grows in ordinary garden soil as long as it does not dry out. Plant it in full sun to part shade, and prune lightly while dormant by thinning the oldest canes.
Native bees visit the flowers, and birds and small mammals eat the hips through the cold months. The dense, thorny canes give nesting cover to songbirds.
Growing roses? Read the Rose Care Calendar - pruning by class, feeding, pests, climbers, and growing for hips, timed to your frost dates.Ecoregions:Northern ForestsEastern Temperate Forests
These dates are for Zone 6b. Enter your ZIP to time every job to your own frost dates.
- cut · Feb 27Thin the oldest canes at the base and cut out dead wood; it suckers, so pull any that stray from the planting
- plant · Mar 13 - Apr 3Plant bare-root or potted stock while dormant, setting the crown at the depth it grew in the pot
- overwinter · Mar 27 - Apr 17First feed and mulch: As the buds break, work a balanced rose feed into the soil around the base and lay a thick mulch of compost or well-rotted manure over the root zone (keep it off the stems).
- watch · Apr 24 - Jun 5Watch for black spot and aphids: As the new growth softens, aphids cluster on the tips and the first spots of fungal disease appear on the lower leaves.
- watch · May 8Spray roses preventively against yellow spot (rose rust) in preparation - a mix of copper fungicide, milk and water with a little dish soap, plus a garlic spray - before the spots can take hold
- watch · May 29Check leaf undersides weekly for yellow spot (rose rust) - once roses get the spot there's no cure, so remove and destroy infected leaves immediately
- cut · Jun 5 - Jul 3Prune right after flowering: Once the flush fades, cut flowered canes out at the base (ramblers), shape lightly (old garden roses), or just remove the dead and tired wood (species roses, which you leave alone if you want hips).
- watch · Jun 12 - Jun 26Second feed after the first flush: Once the first big flush fades, feed again to fuel the repeat.
- watch · Sep 4 - Sep 18Last feed of the year: Stop feeding six to eight weeks before your first frost.
- watch · Sep 18Stop deadheading - let the hips set: This is the single switch that turns spent flowers into fruit: leave the last blooms on the plant instead of cutting them.
- sow · Oct 2 - Nov 13Sow seed from ripe hips outdoors and leave it to cold stratify naturally - germination is slow and often waits for a second spring, so mark the spot
- cut · Nov 6 - Nov 20Harvest the hips: Pick after the first light frost, once the hips are fully coloured and just slightly soft - the frost turns their starch to sugar and takes the astringency off.
- overwinter · Nov 20 - Dec 25Winter tidy and protect: After leaf-fall, shorten very long canes by a third so winter wind can't rock the roots loose, and mound compost or bark over the graft union of grafted roses in cold zones.
- buy · Jan 2 - Jan 16Order bare-root or potted plants - about two months before planting; native roses from local growers sell out early
Yellow spot (rose rust)
Bright yellow spots on the upper surface of leaves, with orange-yellow powdery pustules on the underside. Leaves may drop prematurely. Worst in cool, wet springs.
Remove and bin all affected leaves - do not compost. Apply a systemic fungicide (myclobutanil or trifloxystrobin) at first sign and repeat every 10–14 days. Spray preventively from early spring before infection takes hold. Improve air circulation by pruning to an open centre.
Rose Black Spot
Round black spots with fringed edges on leaves, often surrounded by yellowing. Affected leaves drop early, weakening the plant.
Remove and destroy infected leaves and fallen debris. Avoid overhead watering. Apply a fungicide labeled for black spot at first sign and repeat per label. Choose resistant varieties and space plants for airflow.
Powdery mildew
White or grey powdery coating on leaves - usually starting on older growth in humid conditions or when nights cool.
Improve air circulation by thinning plants. Apply neem oil or potassium bicarbonate spray at first sign. Avoid overhead watering.
Aphids
Aphididae →Clusters of small soft insects on new growth and flower buds.
Knock off with a strong jet of water. Ladybirds and lacewings are natural predators. Insecticidal soap as last resort.
Japanese Beetle
Popillia japonica →Adults skeletonize leaves and devour petals and buds; aggregations escalate rapidly. Grubs destroy turf in late summer and fall.
Hand-pick adults in early morning into soapy water - beetles are sluggish when cool. Neem oil applied to foliage deters feeding but must be reapplied after rain. For grubs, apply milky spore (Bacillus popilliae) to turf - it takes 1–3 seasons to establish but provides long-term biological control. Beneficial nematodes (Heterorhabditis bacteriophora) applied in late August when grubs are young and near the surface offer faster results. Never use pheromone traps.