Organic ‘Evening Primrose’ (Oenothera biennis) from the seed company Gaia, a North American perennial with night-blooming flowers and a delicate fragrance

Evening Primrose ‘Evening Primrose’ is a heritage perennial native to North America, known for its bright yellow flowers that open at dusk and close around midday. This nocturnal bloom attracts moths and hummingbirds, making evening primrose a valuable nectar-producing plant. Long used in traditional American herbalism , it provides leaves and roots with recognized properties. Its slender form and luminous flowers add a magical touch to natural gardens, wildflower meadows, and lightly shaded borders.

Companion plants : Alliums, Phlox, Cosmos, Ornamental grasses, Bearded irises, Sage
Negative plants : Cabbage, Broccoli, Kale, Cauliflower, Brussels sprouts, Kale

Spread/Habit : Upright and airy clump
Plant height : 90 to 150 cm
Quantity per packet : 50 seeds
Certification : Certified organic by Ecocert Canada
Special features : Night-blooming, bright yellow flowers, medicinal, very attractive to bees, self-seeding perennial

Leaf color : Medium green
Texture/flavor : Tender leaves (herbal), edible flowers
Cold tolerance : Down to -30C

Farming method

Stratify the seeds for two weeks before sowing. Sow indoors 6 weeks before the last frost, placing the seeds 12 mm deep. Maintain a temperature of 1821C (optimum 20C). Transplant outdoors when all risk of frost has passed. Plant in light shade (level 1) with moderate watering (level 2). Space plants 3845 cm apart, with 5060 cm between rows.

Harvesting and preservation

Harvest the leaves in the first or second year, with the second-year leaves being more aromatic and potent. The roots can be harvested at the end of the first year while they are still tender. The edible flowers can be picked for salads or culinary decorations.

Store fresh leaves in the refrigerator for a few days or dry them for extended use.

Usage ideas

In herbal teas or traditional herbal preparations
As edible flowers in salads
In the night gardens to enjoy the twilight opening of the flowers
To attract hummingbirds and pollinators to the vegetable garden
In flowery meadows for a bright yellow touch

The evening primrose ‘Evening Primrose’ combines nocturnal beauty, medicinal tradition, and great resilience. A poetic and useful perennial, perfect for naturalistic gardens.