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Top 8 Fast-Growing Annual Flowers

If you’re looking to add a splash of color to your garden in a hurry, fast-growing annual flowers are the perfect solution. These flowers bloom quickly and provide vibrant, beautiful displays throughout the growing season. Whether you’re an experienced gardener or a beginner, these annuals are easy to grow and maintain, ensuring that your garden will be full of life and color in no time. Let’s dive into the top eight fast-growing annual flowers that will transform your garden.

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Marigolds are the traditional go-to for gardeners looking for fast-growing annuals. These bright and cheerful flowers bloom in shades of yellow, orange, and mahogany within just eight weeks of seeding. They are incredibly versatile and can be planted in garden beds, borders, or containers. For maximum results, plant marigolds in full sun and well-draining soil. They are not only beautiful but also act as natural pest deterrents, making them a functional and attractive choice for any garden.

Sweet Pea

Sweet peas, with their delicate ruffled flowers and tiny tendrils, bring an old-fashioned charm to any garden. These climbing plants are perfect for bean tepees, arbors, trellises, and fences. Depending on your location, planting times may vary. Southerners should plant in October to take advantage of cooler temperatures, while those in the north should seed in early spring. Sweet peas thrive in cooler weather and reward gardeners with a delightful fragrance and an array of colors.

Morning Glory

Morning glories are popular for their old-fashioned elegance and stunning trumpet-shaped blooms in pink, white, purple, blue, and magenta. These fast-growing annual vines are sun worshippers, with petals that unfurl each morning to greet the day. They are ideal for covering fences, trellises, and arbors quickly. Plant morning glories in full sun and well-draining soil, and you’ll enjoy a continuous display of vibrant flowers throughout the summer and early fall.


Zinnias are cheerful bloomers that come in virtually every color imaginable. These fast-growing annuals are a favorite among gardeners due to their ease of growth and stunning variety. Zinnias can be started from seed directly in the garden, and you’ll see seedlings sprouting within days. In just six weeks, they begin to bloom, filling your garden with bright, cheerful flowers. Zinnias thrive in full sun and well-draining soil and are excellent for cut flower arrangements, adding a touch of summer to your home décor.

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Phlox is a fast-growing, attractive plant that thrives in areas where other plants might struggle. This versatile flower can be used in garden borders, rock gardens, and containers. Phlox blooms in early summer, producing drifts of tiny flowers in shades of pink, red, white, blue, and purple. These flowers are not only beautiful but also attract butterflies and other pollinators, adding life and movement to your garden. Plant phlox in full sun to partial shade for the best results.

Bachelor’s Button

Bachelor’s buttons, also known as cornflowers, are charming flowers that evoke memories of Grandma’s garden. These fluffy blooms are easy to grow and quickly appear in sunny regions. Once established, bachelor’s buttons can self-seed and naturalize, providing a reliable and beautiful presence year after year. These flowers come in shades of blue, pink, white, and purple, adding a cottage garden feel to your outdoor space. Plant them in full sun and enjoy their nostalgic beauty all summer long.


Nasturtiums are a herbaceous perennial often grown as annuals. Their beautiful orange blossoms and emerald green leaves make them a standout in any garden. One of the best edible flowers, nasturtiums are as functional as they are beautiful. They grow quickly, require minimal maintenance, and can thrive in poor soil conditions. Plant nasturtiums in full sun to partial shade, and they’ll reward you with vibrant blooms and edible leaves, flowers, and seeds that add a peppery flavor to salads and dishes.

California Poppy

California poppies are known for their fern-like leaves and cupped flowers that resemble the color of the setting sun. These native wildflowers are easy to grow and thrive in full sun, making them an excellent choice for sunny garden spots. California poppies self-seed readily, ensuring a recurring display of their bright orange flowers year after year. Plant them in well-draining soil and enjoy their carefree beauty as they bloom profusely throughout the spring and summer.