6 Container Annuals That Are Almost Impossible to Kill - Backyard Boss
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6 Container Annuals That Are Almost Impossible to Kill

Annuals offer stunning blooms and show-stopping season-long color. Regardless, it can be hard to maintain beautiful flowers if you’re lacking a green thumb. There’s nothing more frustrating than lackluster blooms or plants that never make it to the end of the season, especially if all you dream of is an eye-catching container garden.

Fortunately, there is a simple solution: opting for one (or more!) of these six best container annuals that are almost impossible to kill! Because they don’t require constant attention, watering, perfect lighting, or care, these hardy container annuals are as low-maintenance as they are beautiful, making them perfect for decorating your porch or balcony. 

Once you plant them, they’ll require little attention but continue to bloom and grow. This makes them perfect for beginners or those lacking a green thumb.

Calibrachoa

Close up image of pink Calibrachoa flowers
Image credits: Rebecca Niver via Unsplash

Available in a rainbow of colors from red to violet, calibrachoa annuals grow in full sun. They can withstand high heat as long as they are properly watered. Otherwise, calibrachoa is drought tolerant and can survive in partial shade, though you will see the most impressive blooms with proper lighting and watering.

The flowers also tend to trail, making these plants perfect for hanging baskets and containers. Well-draining potting mix with a soil pH of around 5.5 to 6 will help calibrachoa flowers bloom all season long. Also, deadheading is not required since these plants drop flowers once they’re ready, and they will continue to bloom until the first frost.

Marigold

Close up image of marigold flower
Image credits: JACLOU-DL via Pixabay

From yellow and gold to red and copper, marigolds come in an abundance of vibrant colors. Marigolds also attract pollinators, and the scent of the foliage repels pests such as deer and rabbitsThe hardy annuals are also quick bloomers, especially when you plant them in well-draining soil and give them full sun. However, they can survive in poor soil conditions.

While there are several reasons to plant marigolds in your garden, they make the perfect addition to a container garden. They also come in different varieties, ranging from smaller than 6 inches tall to 3 feet tall. With just a touch of deadheading, marigolds will bloom well into the fall. As a bonus, they are drought tolerant, making them hard to kill.

Osteospermum

Osteospermum flowers
Image credits: manfredrichter via Pixabay

Also referred to as the African daisy, osteospermum features daisy-like flowers that thrive in full sun and well-draining soil. The plant will continue to bloom and grow in hot, dry conditions, and it can also tolerate frost.

The flowers also come in a variety of colors, ranging from blue and violet to yellow and white. These fragrant blooms are also deer-resistant, making them the perfect addition to your balcony or container garden.

Alyssum

Alyssum flowers
Image credits: dewdrop157 via Pixabay

Alyssum is an easy-to-grow annual featuring plenty of small yet stunning blooms that are sure to add to your curb appeal. Though it’s a popular choice for ground cover, alyssum’s fragrant flowers and white, purple, or pink coloring make it a great option for containers. This annual thrives in sun and well-draining soil, though it can tolerate shade and will continue to bloom throughout the late spring, summer, and early fall.

Black-Eyed Susan

Black-eyed Susans in a field
Image credit: brian60174 via Pixabay

Black-eyed Susans feature brightly colored yellow and gold flowers which bloom from mid-summer through fall. This wildflower thrives in moist, well-draining soil with full sun or partial shade. They are also drought tolerant once established and will attract an abundance of pollinators to your yard.

Black-eyed Susan plant varieties include annuals, biennials, and perennials. They are often labeled a “short-lived perennial,” making them a great choice for an annual container garden.

Sweet Pea

closeup of a group sweet pea
Image credits: SusaZoom via Shutterstock

If you love the look of vining plants, opt to grow sweet pea annuals in containers. Use a trellis to control the vines and watch the unique pink, orange, gold, yellow, red, or white flowers climb.

These plants prefer afternoon shade and a cool climates, though they are heat and cold tolerant. Planted in well-draining soil, sweet pea plants are also drought tolerant, making them a hard-to-kill addition to your container garden.

Grow, Grow, Grow!

Though most of these options prefer full sun, they can tolerate partial shade. Plus, they tend to be drought-tolerant, making them the ideal option for the forgetful gardener. Because they aren’t very fussy, they tend to be hard to kill. With well-draining soil and plenty of sunlight, these plants will be content and boast beautiful blooms throughout the season.

Will you be planting any of these hard-to-kill container annuals this year? Share your favorites below!

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