Hardiness zones in Canada are not the same as in the United States. Plants listed for a zone in the United States are hardy in one zone higher in the Canadian system. for instance, plants in USDA Hardiness Zone 4 are in Canadian Hardiness Zone 5. Be careful to use the Canadian system, not the United States'. Northern Ontario is in a temperate zone -- 4 on the Canadian map -- giving gardeners the same choice as a large section of the United States.
Common evening-primrose (Oenothera biennis L.) produces yellow, pink or white 2-inch wide flowers that bloom from July through September in clusters at the top of 2-to-6-feet tall stems. The plant is a biennial with base leaves appearing in the first year and the stems and flowers that open in the evening and close by noon the next day in the second. Plant common evening-primrose in full sun, partial shade or full shade and a soil that is rocky or sandy and dry. The plant will attract both songbirds and hummingbirds.
American White Water-Lily
American white water-lily (Nymphaea odorata Ait.) is also known as fragrant water lily, fragrant white water-lily and white water-lily. The plant floats in garden ponds, grows up to 10 inches across and produces flat, long-stemmed floating leaves that are green on top and red or purple on the bottom. The large, fragrant , white or pink flowers measure 2-to-6 inches across, open in the morning and close at noon. The flowers bloom from March through October and produce berries that make a meal for birds. Plant American white water-lily in the soil at the bottom of a shallow pool. The pool can be in the sun, partial shade or full shade. Waterfowl and small animals will make a meal out of the seeds.
Yellow Marsh Marigold
Yellow marsh marigold (Caltha palustris L.) is a member of the buttercup family. The plant is a succulent that grows from 1-to-2 feet tall and produces heart or kidney-shaped leaves and bright, yellow flowers that grow in clusters and bloom in April and May. Plant yellow marsh marigold in full or partial shade and a soil that is moist to wet.
Virginia springbeauty (Claytonia virginica) is also known as springbeauty and is a member of the purslane family.The plant grows from 4-to-12 inches tall with two grass-like leaves growing halfway up the stem. Pink or white flowers with dark pink veins grow in clusters at the upper section of the stem, blooming from January through May. Plant Virginia springbeauty in partial shade and a moist soil.