10 Mid-Summer Blooming Perennials for Your Minnesota Garden

Cluster of white blooms in sunny flower bed, garden center, Minnesota perennials

When summer is in full swing, your garden should be hitting its stride. As spring bloomers fade, mid-summer perennials step in, carrying color, texture, and pollinator activity through the heart of the growing season.

These tried-and-true perennials are well-suited to Minnesota gardens and reliably perform in our variable weather, warm days, and cooler nights.

1. Garden Phlox (Phlox paniculata)

Garden phlox is a mid-summer standout, known for its large, fragrant flower clusters and classic cottage-garden feel.

  • Bloom Time: Mid–late summer (July–August)
  • Height: 2–3 feet tall at maturity
  • Colors: White, pink, red, lavender, purple

Because of their height, tall garden phlox works best toward the back of garden beds. Many newer varieties offer improved mildew resistance, making them even more reliable.

2. Daylily (Hemerocallis)

Daylilies are one of the most adaptable perennials you can grow.

  • Bloom Time: Early summer–fall (June–September)
  • Thrive in a wide range of conditions
  • Available in nearly every color imaginable

They’re low-maintenance, drought-tolerant once established, and perfect for filling space with dependable color year after year.

3. Shasta Daisy (Leucanthemum × superbum)

Cheerful and timeless, Shasta daisies bring classic charm to summer gardens.

  • Bloom Time: Early summer–early fall (June–August)
  • Size: 2–3 feet tall and 1–2 feet wide at maturity
  • Excellent for cutting gardens

Their bright white petals and sunny yellow centers pair beautifully with almost any other perennial.

4. Echinacea (Coneflower, Native)

Coneflowers are a Minnesota favorite and garden workhorses.

  • Bloom Time: Summer–early fall (July–September)
  • Height: 2–3 feet tall at maturity
  • Colors: Pink, purple, orange, white, yellow, red

Extremely cold-hardy and drought-tolerant, echinacea is also a pollinator favorite. Native varieties are a great choice for naturalized or prairie-style gardens.

5. Monarda (Bee Balm)

Monarda brings bold color and buzzing activity to the garden.

  • Bloom Time: Summer (June–August)
  • Size: 8–35 inches tall at maturity
  • Attracts bees, butterflies, and hummingbirds

It’s also deer-resistant, making it a smart choice for many Minnesota landscapes. Try the native variety, Wild Bergamot for naturalized gardens.

6. Veronica (Speedwell)

Veronica adds vertical interest and long-lasting color.

  • Bloom Time: Late spring–summer (June–August)
  • Size: 1–3 feet tall at maturity
  • Colors: blue, purple, pink, white

This easy-care perennial looks especially striking planted in groups.

7. Campanula (Bellflower)

Cool Minnesota nights help campanula thrive.

  • Bloom Time: Summer (June–July, often into fall)
  • Prefers moderate temperatures
  • Colors: purple, white

Campanula works well in borders, cottage gardens, and partially shaded areas.

8. Liatris (Blazing Star, Native)

This native perennial adds drama and texture with its unique bloom pattern.

  • Bloom Time: Mid–late summer (June–August)
  • Size: 1–5 feet tall at maturity
  • Colors: purple, white

Liatris is a wonderful companion plant with allium to attract pollinators. The foliage turns a beautiful bronze in fall.

9. Asclepias (Milkweed & Butterfly Weed, Native)

Asclepias is essential for any Minnesota pollinator garden.

  • Bloom Time: Summer (June–September)
  • Size: 3–5 feet tall at maturity
  • Colors: pink, purple, orange, yellow

Milkweed is the sole food source for monarch butterfly larvae, making it a meaningful addition to any garden focused on ecological health.

10. Hosta

While known for foliage, hostas still earn a place in mid-summer gardens.

  • Bloom Time: Summer (June–July)
  • Offer subtle summer blooms on tall scapes
  • Colors: hues of green, blue, variegated varieties

With thousands of varieties available, hostas provide structure, texture, and long-term reliability—especially in shaded areas. They’re also easy to be divided.

Build a Garden That Carries You Through Summer

Mid-summer perennials keep Minnesota gardens vibrant long after spring fades. Whether you’re building a pollinator haven, filling gaps in your beds, or planning for continuous bloom, these plants offer beauty you can count on.

Stop by Sunnyside Gardens to explore which varieties are performing best right now—we’re always happy to help you choose plants that thrive in your space and grow with confidence.

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