If you’re looking for a quick way to spruce up your front or back yard this summer, flowers are the perfect solution. There’s no need to wait around for months before you see any results – plant these 12 fast-growing varieties and enjoy them in your garden.
We chose these flowers for their quick visual impact on a garden. Some take less than 30 days and some were chosen because they can bloom outdoors in less than 60 days if started indoors first.
Zinnias only take a short time to reach their full size, making them a perfect choice for last-minute plantings. They’re also effortless to care for and will produce brightly colored flowers that will be sure to dazzle your neighbors!
Smaller zinnias will bloom in just a few weeks, while larger ones will require a little more time.
Zinnias are drought-tolerant and can be planted in almost any place except for the coldest regions of North America. They’re also available in an array of different colors and petal styles to fit your personal taste or home decorating needs!
Bloom time: 6-7 weeks after planting
Sweet peas can be started a few weeks before the last frost date, giving them a head start on growing and blooming. For example, if you plant out in May, you’re sure to have blooms by early July.
Sweet peas are a cool weather plant that will do well in partial shade so that you can plant them close to your house without concern for the heat. Plant your seeds about an inch deep and thin them out when they get too crowded.
They typically take around 30-45 days to bloom after the first signs of vining.
Sweet peas are one of my absolute favorite flowers, and I plant them en-mass every single year to fill my garden and yard with their lovely heady scent. In addition, they make an amazing cut flower.
Bloom time: 4-6 weeks (started indoors 4 weeks early)
The California poppy only takes 45 days to bloom! That makes it one of the fastest-growing flowers on our list.
They need lots of sun, so make sure they are planted in an area with full exposure to sunlight. These beauties will grow well around rocks and other low-maintenance plants that don’t require fertilizing or watering.
Take care not to plant them too deep; only a few inches down should be enough.
Bloom time: 45-60 days
Marigolds are a must-have in any garden, and they only take 45 days to bloom!
Plant them in a sunny location with well-drained soil. This flower is relatively trouble-free and can withstand high temperatures as long as it’s watered regularly.
It would help if you planted marigolds about 12 inches apart from one another for each plant you want to grow. You can also plant them in your vegetable garden to help keep away pests. I start them indoors a few weeks before it’s time to plant out, and they are always one of my fastest-growing flowers.
Bloom time: 45 days
Another favorite for me, especially in the summer months, is nasturtiums. They are one of the fastest-growing flowers we plant annually and will grow well in the sunlight or shade with moist soil. These flowers add color, texture, and so much more!
This plant only takes 45 days to bloom and can be planted in any well-drained soil, even those neglected during the winter months. Plant these flowers about 12 inches apart from one another so you’ll always have blooms!
I always add nasturtiums to my vegetable garden to wind and grow along with my pumpkin vines. They always add a lovely pop of color.
Bloom time: 45 days
Annual phlox is a favorite for borders in the spring and also does well as an annual.
This plant only takes 55 days to bloom and has beautiful purple or pink flowers that will come back every year. Plant these flowers about 12 inches apart from one another so you’ll always have blooms on your hands!
I love the showiness of these flowers, and they’re a favorite in my garden.
Annual phlox will bloom from early spring to mid-summer.
Bloom time: 55 days
Sweet alyssum is a short plant that will grow about 12 inches high and take up very little space! 50 days to bloom is what these plants need, which means you can have flowers blooming by early-mid spring. Plant them about 18 inches apart so they’ll have room to grow.
Alyssum has a wonderful scent and works well in flower beds, cottage gardens, and borders.
Bloom time: 50 days
To grow bachelor buttons, you will need a full sun location with well-drained soil. These plants bloom from late spring to early summer and are beautiful in rock gardens, borders, or cottage garden settings.
Bachelor buttons only take 30 days to bloom. The colors range from blue to purple, white, and yellow.
Bloom time: 30 days
These beautiful blue flowers take up very little space, so they are versatile for many different types of gardens. They bloom in mid-summer with about 30 days of growing time from planting the seed. To grow them, you will need a site in full sun or shade with moist but well-drained soil.
Bloom time: 30-45 days
Cornflowers are easy to grow from seed and can grow 12 inches tall in a single season.
Colors range from orange to blue, with some white petals mixed in.
Cornflowers need full sun and regular watering but are drought resistant when established. Cornflowers will bloom in as little as 9 weeks from planting.
This flower is great for planting near pond areas or other moist soil because it is tolerant of wet conditions and pests.
Bloom time: 60-67 days (save time by starting plants indoors 4 weeks before planting out)
Cosmos flowers are a great addition to any garden with their unique color combinations and free-flowering nature. In addition, they are one of the easiest flowers grown from seed!
Colors range from purple, pink, red, yellow, and orange. They are showy flowers with delicate petals that really stand out against dark foliage.
Cosmos are fast-growing annuals, and they can grow up to 24 inches tall. They also have a beautiful fragrance that attracts pollinators in droves.
Bloom time: 50-60 days
Sunflowers grow quickly even when planted by seed, and they provide a showy display of color with their large heads.
The flowers are considered drought-tolerant, so you don’t need to worry about not getting enough water or nutrients if your garden is in an area that struggles during the summertime months. They also work well as cut flowers, which allow you to enjoy them inside your home as well as in the garden.
Bloom time: 12 weeks (speed this up by planting indoors 4 weeks before the last frost date in your zone and have blooms in 60 days)
Fasting Growing Flowers for the Impatient Gardener!
It’s time for summer flowers! Pick a few of the fastest-growing flowers we have on our list and get planting. Be the envy of the neighborhood when your garden is in full bloom before everyone else!
Now that you know the fastest-growing flowers check out our other flower posts to get more ideas and tips on caring for your blooms.