As the frost of winter melts away and the first green shoots of spring begin to emerge, gardeners everywhere start to dream of their summer gardens.
The vibrant hues, the fragrant breezes, and the bustling life that comes with a garden in full bloom are truly a gardener’s reward.
If you’re looking to fill your summer days with color and scent, sowing the right flowers at the right time is key.
Early May offers the perfect window for planting a variety of flowers that will transform your garden into a summer spectacle. Here are the top 10 flowers to sow in early May for a radiant garden.
Top 10 Flowers to Sow in Early May for Summer Blooms
1. Sunflowers (Helianthus annuus)

Sunflowers
Starting our list with a classic, sunflowers are not only easy to grow from seed but also a symbol of summer. With their towering heights and bright, sunny faces, they bring a touch of cheerfulness to any garden.
Sunflowers are incredibly versatile, available in sizes that range from dwarf varieties suitable for small spaces to majestic giants that can reach over 10 feet tall. They’re also remarkably fast growers, with some varieties blooming as soon as 60 days after sowing.
2. Marigolds (Tagetes)

Marigolds
Marigolds are a must-have for any summer garden due to their vibrant colors and easy-care nature. These hardy annuals can be sown directly into the garden in early May and will bloom tirelessly until the first frost.
Their shades of yellow, orange, and deep red add a warm palette to your garden, and they have the added benefit of repelling pests and attracting beneficial insects.
3. Zinnias (Zinnia elegans)

Zinnias
Zinnias are the epitome of summer. With their wide range of colors and sizes, they fit perfectly into any garden design. From miniature varieties perfect for borders to tall, robust types that create an instant backdrop, zinnias are as versatile as they are beautiful.
They’re also incredibly easy to grow from seed and are known for their ability to withstand hot summer weather, making them a staple for the summer garden.

4. Cosmos (Cosmos bipinnatus)

Cosmos, when grown in large quantities, is capable of attracting bees and other pollinators to it
Cosmos are the whimsical darlings of the flower garden, with their delicate, ferny foliage and flowers that seem to dance atop long, slender stems.
Sowing cosmos seeds in early May will result in a profusion of blooms that can last from mid-summer well into autumn. They come in shades of pink, purple, white, and even yellow, offering a soft palette that complements bolder summer blooms.
5. Nasturtiums (Tropaeolum majus)

Nasturium Care
Nasturtiums are not only beautiful and easy to grow, but they’re also edible. Their peppery-tasting flowers and leaves add a splash of color and a gourmet touch to salads.
Sow them in early May, and you’ll enjoy their vibrant red, orange, and yellow blooms all summer long. Nasturtiums are also great for companion planting, as they can help deter pests from more vulnerable plants.
6. Lavender (Lavandula)

Lavender (Lavandula spp.)
Lavender, with its soothing fragrance and attractive foliage, is a lovely addition to the summer garden. While often propagated from cuttings, many varieties can be successfully grown from seed if started early enough.
Sowing lavender in May can lead to a mid to late summer bloom, filling your garden with its iconic scent and providing a haven for bees and butterflies.
7. Snapdragons (Antirrhinum majus)

Snapdragons add a touch of elegance and whimsy to the garden with their tall spikes of brightly colored flowers. They come in almost every color of the rainbow and add height and interest to garden beds and borders.
Sow them in May, and you’ll see blooms from early summer through fall. Snapdragons are particularly beloved by children for the unique way their flowers open and close like mouths when gently squeezed.
8. Bachelor’s Buttons (Centaurea cyanus)

The distinct blue-tinged flowers of the Bachelor’s Button helps in attracting bees to it
Also known as cornflowers, Bachelor’s Buttons are charming, easy-to-grow flowers that offer a delicate beauty to the summer garden.
Their frilly, bright blue blooms are a rarity in the floral world, providing a stunning contrast to the more common yellows and reds of summer blooms. Sown in early May, they will bloom vigorously through the summer and are excellent for cutting and adding to bouquets.
9. Black-eyed Susan (Rudbeckia hirta)

Black-Eyed Susan (Rudbeckia hirta)
Black-eyed Susans are the quintessential wildflower, bringing a touch of meadow-like charm to the garden. Their golden-yellow petals and dark brown centers are reminiscent of sunflowers but on a smaller scale.
These robust flowers are easy to grow from seed in May and will bloom from mid-summer into fall, offering a long-lasting display of color.
10. California Poppies (Eschscholzia californica)

Another attractive plant that grows colorful blooms in your southwest-facing garden is the California Poppy
For a touch of the West Coast, California Poppies are an excellent choice. Their silky, cup-shaped flowers in shades of orange, yellow, red, and white are a sight to behold.
These drought-tolerant flowers are perfect for gardeners seeking low-maintenance options. Sow the seeds in early May, and you’ll be rewarded with a carpet of luminous blooms that last all summer.
Your Summer Garden Starts Now
Sowing the right flowers at the right time is crucial for creating a garden that blooms beautifully during the summer months.
The flowers listed above are not only beautiful but also relatively easy to grow, making them perfect for both novice and experienced gardeners.
By planting these seeds in early May, you’ll ensure a vibrant, fragrant, and lively garden that thrives throughout the summer. Remember, the key to a successful garden is not just in the sowing but also in the joy and care you bring to it throughout the growing season. Happy gardening!

Daniel has been a plant enthusiast for over 20 years. He owns hundreds of houseplants and prepares for the chili growing seasons yearly with great anticipation. His favorite plants are plant species in the Araceae family, such as Monstera, Philodendron, and Anthurium. He also loves gardening and is growing hot peppers, tomatoes, and many more vegetables.

