A Guide to Prairie Planting

A Guide to Prairie Planting. Set against an image of a Prairie Garden.

Imagine a garden filled with graceful grasses and vibrant perennials, swaying together in a gentle breeze. This relaxed, naturalistic style, known as prairie planting, brings the untamed beauty of a meadow right to your doorstep. While most effective in larger spaces, you can also capture this stunning effect in smaller gardens.

This style of planting creates a rich habitat for wildlife, offering nectar for pollinators and shelter for overwintering insects. Discover how to create your own prairie-style garden, a beautiful and evolving landscape that offers interest all year round.

What is Prairie Planting?

The term “prairie” traditionally refers to the vast grasslands of the American Midwest. In gardening, however, it has evolved to describe a style that combines grasses and flowering perennials requiring similar growing conditions.

While you could base a scheme on a South African meadow or Mediterranean maquis, a prairie-style garden doesn’t have to be geographically pure. You can successfully combine plants from different parts of the world, as long as they thrive in similar soil and climate conditions. This guide will walk you through creating these beautiful, naturalistic plantings, whether in a dedicated border or across a larger landscape where they have the most dramatic impact.

When to Establish a Prairie Planting

The best time to start your prairie garden is in March. As the soil begins to warm up, your plants will have the entire growing season to establish strong roots. While some planting can be done in September, this timing is not ideal for warm-season grasses.

If you’re starting from seed, the timing will depend on the specific mix you choose. Always select species with similar germination requirements so they can be sown together and grow in harmony.

How to Create a Prairie-Style Garden

There are two main approaches to creating a prairie-style garden, each resulting in a distinct look and feel.

  • Planting in drifts: This method involves planting established grasses and flowering perennials in flowing groups or blocks. The result is similar to a traditional border but with a more natural, evolving character.
  • Broadcast sowing: By sowing a mix of seeds directly onto the soil, you can create a true ecological community where plants compete and mingle naturally. This approach mimics a genuine prairie and changes continuously over the years.

Regardless of the method you choose, a site that receives full sun for most of the day is generally the best option.

1. Planting a Prairie-Style Border

This method is an excellent way to introduce the prairie look into your garden. It draws inspiration from traditional perennial borders, which have long featured prairie natives like phlox, goldenrod (Solidago), and asters. By incorporating ornamental grasses, you can create a space that truly captures the spirit of the prairie.

Advantages:

  • Ideal for smaller gardens where space is limited.
  • Using well-developed plants gives them a head start against pests.
  • Planting in defined drifts makes it easier to identify and remove weeds.

Disadvantages:

  • Requires as much maintenance as a traditional herbaceous border.
  • The planting is less dense than a seeded prairie, leaving more room for weeds to establish if not regularly maintained.

How to Prepare the Ground

Your success starts with thorough ground preparation.

  1. Ensure the area is completely free of perennial weeds like couch grass, ground elder, and bindweed.
  2. If you’re creating a new border, rotavate the ground to break up the soil.
  3. Incorporate a generous 7.5cm (3in) layer of well-rotted garden compost or manure to enrich the soil and improve its structure.

Design and Planting

With your canvas prepared, it’s time to select your plants.

  • Assess your site: Determine how much sun the area receives and identify your soil type.
  • Plan your display: Decide when you want the main floral display to be and how long it should last.
  • Create variety: Aim for a mix of flower shapes—daisies, spires, globes, and airy “see-through” plants—to add texture and interest.
  • Plant in drifts: In smaller areas, plant in informal drifts of at least five plants of the same species. This creates a more naturalistic impression than single specimens.
  • Consider the light: Use backlighting from the low sun to illuminate grasses and seed heads. Island beds work particularly well for this.
  • Layer your planting: Choose plants that provide interest throughout the seasons. Start with low-growing spring perennials, followed by taller plants that flower through summer and into autumn.
  • Repeat groupings: Repeating clusters of plants throughout the border creates a sense of rhythm and coherence.
  • Include annuals and bulbs: Don’t forget to add annuals, biennials, and bulbs for extra layers of colour and interest.

For larger spaces, consider using the matrix planting technique, championed by renowned garden designer Piet Oudolf. This involves:

  1. The matrix: A base layer of one or two species, often a grass, planted in large numbers to unify the design.
  2. Primary plants: Groups of strong, structural flowering plants planted within the matrix to provide the main interest.
  3. Scatter plants: A few “secondary” plants, like Verbascum, added randomly to give the planting a spontaneous, natural feel.

Aftercare

  • Mulch deeply: Once planted, apply a 7.5cm (3in) layer of mulch, such as bark chips or gravel, to suppress weeds and retain moisture.
  • Water regularly: Water thoroughly at least twice a week during the first two growing seasons to help plants establish.
  • Weed diligently: Remove weeds regularly before they have a chance to set seed.
  • Cut back in spring: Leave the foliage and seed heads standing over winter to provide structural interest and shelter for wildlife. Cut everything down in early spring before new growth appears. The old plant material will act as a natural mulch.

2. Prairie Plant Communities from Seed

For a truly naturalistic and low-maintenance garden, sowing seed is the ultimate approach. The goal is to establish a self-sustaining plant community where species intermingle and evolve over time. This method has been pioneered by designers like James Hitchmough and Nigel Dunnett, whose work can be seen at the Oxford Botanic Garden and the London Olympic Park.

Advantages:

  • Establishes a genuine plant community that is more resistant to weeds once mature.
  • More cost-effective than buying established plants.
  • Allows for a greater diversity of species, extending the flowering season.
  • Ideal for sites with low soil fertility.

Disadvantages:

  • Requires significant weeding and maintenance during the initial establishment phase.
  • Slugs and snails can be a major problem for young seedlings in the UK’s damp climate.

How to Prepare for Seed Sowing

This method requires meticulous preparation.

  1. The area must be completely clear of all existing vegetation, especially perennial weeds. Removing them by hand is the most organic method but can take a year or more.
  2. If the area was previously lawn, the soil is likely to be compacted. Dig or rotavate it to the depth of a spade’s blade, then level it carefully with a landscape rake.
  3. To prevent annual weed seeds in the soil from germinating, lay a 7.5cm (3in) deep layer of washed sharp sand over the surface before sowing.

Sowing

  1. Mark out your sowing area into a grid of one-metre squares to ensure even coverage.
  2. Mix your seed with a carrier, such as damp sawdust or kiln-dried sand, at a rate of 1-2g of seed per square metre.
  3. Broadcast the seed and carrier mix over the area, making two passes in different directions for good distribution.
  4. Gently rake the seed into the top layer of sand, again in two directions at right angles.
  5. You can lay open-weave jute netting over the area to protect it from being disturbed by cats or other animals.

You can also add a few mature, container-grown plants to the scheme before sowing. This is useful for perennials that are difficult to grow from seed or for introducing specific cultivars.

Aftercare

  • Water consistently: Water the entire area every few days during the first growing season.
  • Manage slugs: Implement a slug and snail deterrent programme to protect your seedlings.
  • Weed, weed, weed: In early summer, carefully identify and remove any weed seedlings. This is a crucial step.
  • Thin out dominant species: After the second year, you may need to thin out any species that are becoming too dominant. This requires careful observation to maintain a balanced plant community.

Ready to Create Your Own Prairie Garden?

Whether you choose to plant a carefully designed border or sow a wild, evolving meadow, prairie planting offers a wonderfully rewarding way to garden. It connects you with the changing seasons, supports local wildlife, and creates a breathtakingly beautiful landscape that will bring you joy for years to come.

Discover a new way of gardening and create a space that is both stunning and sustainable.

Further Reading: Creating Harmony with Nature Naturalistic Garden Design, Garden Design with Grasses

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