Milkweed Swamp Milkweed White

Pollinator-Friendly Swamp Milkweed Seeds

Swamp Milkweed, also known as Asclepias incarnata, is a beautiful perennial flower loved for its elegant white blooms, gentle vanilla-like fragrance and strong pollinator value. This tall, clump-forming plant is perfect for flower beds, borders, wildlife gardens and natural-style planting.

Growing to around 90–100 cm tall, Swamp Milkweed makes a lovely background plant or garden feature. Its fragrant flowers bloom from July to September and attract butterflies, bees and other beneficial insects.

Plant Details

Plant type: Perennial flower
Botanical name: Asclepias incarnata
Height: Approx. 90–100 cm
Flowering period: July to September
Flower colour: White
Plant spacing: 50 x 50 cm
Sowing depth: Approx. 0.5 cm
Soil pH: 6.0–7.5
Best use: Flower beds, borders, wildlife gardens, pollinator-friendly planting and natural-style gardens

Growing Information

Sow Swamp Milkweed seeds under cover in March to April, or sow directly outdoors in May once the soil has warmed.

Sow seeds at a depth of around 0.5 cm and keep the soil slightly moist during germination. Plant seedlings outdoors in May, once the risk of frost has passed.

Choose a sunny position or light partial shade with fertile, well-drained and moderately moist soil. Space plants around 50 x 50 cm apart to allow good air circulation and strong growth.

Water during dry periods and remove faded flowers to help keep plants tidy and encourage a longer flowering display.

Why You’ll Love It

Swamp Milkweed is a wonderful choice for gardeners who want a beautiful perennial that also supports wildlife. Its fragrant white flowers are highly attractive to butterflies, bees and other pollinators, helping to bring more life into the garden.

This variety pairs beautifully with coneflowers, rudbeckias, asters and other sun-loving perennials, creating a natural and colourful summer border.

It is also a strong, low-maintenance perennial with good disease resistance, making it a reliable choice for pollinator-friendly gardens.

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