Rugosa rose 'Blanc Double de Coubert'

Questions about rugosa rose 'Blanc Double de Coubert'

Does rugosa rose 'Blanc Double de Coubert' need sun or shade?

Rugosa rose 'Blanc Double de Coubert' grows in full sun (6 or more hours of direct sun a day).

It wants dry, sharply drained soil, on the lean side, with no feeding, and little watering once settled.

What zones does rugosa rose 'Blanc Double de Coubert' grow in?

USDA zones 3 to 8. It is hardy to zone 3, which means it survives winter nights down to about −30 °F (−34 °C).

Above zone 8 it struggles: the zones measure winter cold, but a plant's top zone usually means the summers are too hot or the winters too mild for it to rest.

Gardening in Canada? Use the USDA zone for your town: Canada's own zone map uses different numbers.

When does rugosa rose 'Blanc Double de Coubert' flower in my zone?

In zone 5 it flowers early June to mid September. As a summer flower it moves about half a week for every zone: earlier where it is warmer.

Worked out from Hopkins' bioclimatic law: spring arrives about four days later for each degree of latitude north, and one zone is roughly two degrees. A warm spring or a cold one moves any garden two weeks either way.

How far apart should rugosa rose 'Blanc Double de Coubert' be planted?

4 ft (120 cm) apart, from the middle of one plant to the middle of the next. That is a little closer than its full width of 5 ft (150 cm), so a group knits into one patch.

It grows 5 ft (150 cm) tall. Give it the full distance from anything taller, or it will lean out towards the light.

How many rugosa rose 'Blanc Double de Coubert' plants do I need?

Usually one. At 4 ft (120 cm) across, it is a plant you place, not one you mass. For a hedge or screen, set them 4 ft apart: three plants for a 10 ft run.

In the bed above, the planner used one in one group.

Is rugosa rose 'Blanc Double de Coubert' poisonous to dogs and cats?

No toxicity is recorded for dogs, cats, horses or people, according to the ASPCA.

"Not toxic" is not "edible": a pet that eats a lot of any plant can be sick.

Is there a native plant like rugosa rose 'Blanc Double de Coubert'?

Rugosa rose 'Blanc Double de Coubert' is not native to North America. These North American natives come closest to doing its job:

• Ninebark 'Dart's Gold': the same job in a bed, the same size and the same colour; flowers late May to late June, wants average soil.
• Black chokeberry: the same job in a bed, the same size and the same colour; flowers early May to late May, wants average soil.
• Arrowwood viburnum 'Blue Muffin': the same job in a bed and the same colour; 12 in taller, flowers late May to mid June.

Matched the way the planner's Swap button matches plants: the same job in a bed, then size, then flowering time.

Will rugosa rose 'Blanc Double de Coubert' spread?

It spreads sideways, by runners or roots; the risk of it taking over is moderate. Spreads slowly by suckers. Remove unwanted shoots at the base.

What flowers after rugosa rose 'Blanc Double de Coubert'?

Rugosa rose 'Blanc Double de Coubert' is over by mid September. These start as it finishes and carry the same spot on, so it never goes flat:

• Garden chrysanthemum: from mid September to late October, 24 in tall, to stand in front of it and cover its fading stems.
• Montauk daisy: from mid September to late October, 3 ft tall, to stand in front of it and cover its fading stems.
• Tatarian aster 'Jindai': from early October to early November, 4 ft tall.

What does rugosa rose 'Blanc Double de Coubert' look like in winter?

Rugosa rose 'Blanc Double de Coubert' drops its leaves and stands as bare branches. That is when to see its shape, and to prune it if it needs pruning.