Avens

With an appearance similar to roses, avens (Geum spp.) bring traditional charm to a garden when they flower in mid-spring. They can be easily propagated by seed or division. Charming tall, airy flowers that resemble miniature roses top low-mounding dark green foliage that covers the soil, perfect for cottage gardens.

Some top BHG Test Garden picks: 'Solid Gold Dancer' and 'Lady Stratheden' (shown).

Growing Conditions: Full sun (though they appreciate afternoon shade) and moist, well-drained soil

Size: 8-24 inches tall and 6-24 inches wide

Zones: 4-9

Basket-of-Gold

Basket-of-gold (Aurinia saxatilis) happily grows in the cracks and crevices of the garden. In spring, this groundcover's yellow flowers brighten up the edges of gravel paths and may pop up between stones in a retaining wall. In areas where summers are mild, it grows as a perennial; in locations with very hot summers, consider it an annual. Basket-of-Gold is native to Turkey and central Europe and attracts pollinators with its tiny blooms.

Growing Conditions: Full sun and well-drained soil; drought tolerant once established

Size: 6-12 inches tall and 12-18 inches wide

Zones: 3-7

Bearded Iris

Bearded irises need almost no introduction—these romantic, watercolor-like flowers are beloved by both gardeners and floral designers. Sizes range from adorably mini to statuesque. Depending on the type, they can bloom anywhere from early spring to late summer, and some types even rebloom in fall.

Growing Conditions: Full sun and moist, well-drained soil

Size: 5-48 inches tall

Zones: 3-9

Begonias

There are various types of begonias—wax, tuberous, cane, and rhizomatous—each with its own wide range of colors and sizes. These versatile plants are generally easy to grow and will bloom profusely all season. The 'Eva' hybrid begonia (shown) is particularly striking with its pink-and-yellow petals. Begonia is a good addition to annual container displays.

Growing Conditions: Full sun, part sun, or shade, depending on variety; moist, well-drained soil

Size: 6-18 inches tall and 6-12 inches wide

Zones: 7-11

Bidens

Bidens may be small, but they work hard in the garden. Use trailing types of this annual or short-lived perennial to fill out containers with their tumbles of yellow flowers. Plant upright varieties as an eye-catching edging for flower beds. This tough little plant can stand up to difficult conditions.

Growing Conditions: Full sun and well-draining soil

Size: 6-12 inches tall and 1-3 feet wide

Zones: 8-11

Billy Buttons

These yellow orbs are the closest to a ball of sunshine you can get in the garden. A tender perennial, billy buttons (Pycnosorus globosus) are favorites in floral arrangements either fresh or dried.

Growing Conditions: Full sun and well-drained soil; drought tolerant once established

Size: 2-3 feet tall and 10-12 inches wide

Zones: 8-11

Black-Eyed Susan

Prolifically blooming black-eyed Susans (Rudbeckia spp.) call to mind summer wildflower fields. They come in both annual and perennial varieties, such as the award-winning 'American Gold Rush' (shown), which is one of the top-performing plants in the BHG Test Garden.

Once you've planted them, be prepared to welcome more black-eyed Susans: The plants tend to self-seed. And don't worry about critters munching on these pretty flowers. The foliage, covered in coarse hairs, is unappealing to deer and rabbits.

Growing Conditions: Full sun and moist, well-drained soil; drought tolerant once established

Size: 1-5 feet tall and 1-3 feet wide

Zones: 3-11

Calibrachoa

With its cascades of flowers in summer and early fall, calibrachoa is a perfect annual for mixed containers, window boxes, and hanging baskets. Relatively new to the flower world, calibrachoa was introduced in the early 1990s and has evolved since then into a favorite for gardeners.

The BHG Test Garden regularly relies on yellow 'Lemon Slice' to perk up containers with its cheery yellow-and-white flowers.

Growing Conditions: Full sun and moist, well-drained soil

Size: up to 6 inches tall; 12-14 inches wide

Zones: annual

Chrysanthemum

A late-season garden staple, yellow chrysanthemums can keep the sunshine coming through fall until frost. Most garden mums (distinct from greenhouse-grown florist varieties) are perennials, but if you're planting in the fall, when you'll find potted mums for sale everywhere, treat them as annuals because they likely won't survive the winter.

Chrysanthemums are edible, but don't add them to your salad from your garden unless you're absolutely certain they haven't been treated with any chemicals. Instead, head to a favorite Asian market for pesticide-free flowers.

Growing Conditions: Full sun and moist, well-drained soil

Size: 1-3 feet tall and wide

Zones: 5-9

Coneflower

The birds love them, the bees love them—and so do gardeners. Coneflowers (Echinacea spp.) are native to North America and are easy to grow. Lots of yellow-hued varieties are available, such as 'Leilani' (shown) and 'Sombrero Lemon Yellow,' a newer variety that is one of BHG Test Garden manager Sandra Gerdes's favorites. "It blooms reliably for us all summer," she says.

Growing Conditions: Full sun and moist, well-drained soil

Size: 1-3 feet tall and 1-2 feet wide

Zones: 3-9

Coreopsis

Coreopsis asks very little of gardeners aside from a sunny spot to grow—in fact, you may have even seen its bright yellow flowers sprouting along the highway. Blooming from summer through fall, coreopsis is available in both annual and perennial varieties. Birds love its tasty seeds, while pollinators are drawn to it for its nectar, bringing welcome visitors to your garden. However, deer and rabbits stay away from these pretty plants.

Perennial 'Moonbeam' threadleaf coreopsis (shown) is a favorite in the BHG Test Garden for its pale yellow flowers and fine foliage texture.

Growing Conditions: Full sun (though tolerates part shade) and moist, well-drained soil; drought tolerant once established

Size: 1-4 feet tall and 1-3 feet wide

Zones: 3-9

Crocus

Sometimes, even before the snow has melted, crocus announces that spring is on its way. This signal is even more uplifting when you choose a sunshine-yellow variety of this bulb, like 'Yellow Mammoth,' which "really wakes up the Test Garden in spring with its bold golden color," says Gerdes.

Growing Conditions: Full sun to part shade and moist, well-drained soil

Size: 3-6 inches tall and 1-3 inches wide

Zones: 3-8

Daffodils

There may be no more iconic spring flower than the daffodil. Some, however, bloom as early as January, allowing you to enjoy daffodils for several months. This sturdy plant will thrive in all kinds of weather, from cold to high humidity, and return year after year. 'Little Gem' is a classic. "The first daffodil to bloom for us, this small but delightful treasure belongs in every garden," says Gerdes.

Growing Conditions: Full sun and moist, well-drained soil

Size: 4-5 inches tall and wide

Zones: 3-8

Dahlia

Dahlias come in an array of sizes, forms, and colors, but the yellow-flowered varieties are especially flashy. Dahlia tubers can be planted in spring; by late summer, you'll have big blooms ready to be shown off in a vase. Propagate dahlias by stem cuttings, through division, or with seeds, and grow them in pots or in a garden.

Growing Conditions: Full sun or part shade

Size: 15 inches to 6 feet tall, depending on variety

Zones: 8-10

Daylily

Thank plant breeders for the many shades and shapes of daylilies (Hemerocallis spp.) you can find these days. The petals of this summer-blooming perennial take many forms, like the yellow-green 'Green Spider' (shown) or the lightly ruffled 'Happy Returns,' which reblooms throughout summer.

Growing Conditions: Full to part sun and well-draining soil; drought tolerant once established

Size: 1-3 feet tall and wide

Zones: 3-10

False Indigo

False indigo (Baptisia australis) may be best known for its blue-flowered varieties. But other cultivars of this native prairie plant, such as 'Carolina Moonlight' (shown), bloom with spires of yellow flowers starting in spring. "Early to bloom for us, it's a great addition to prairie, meadow, or cottage-style gardens," says Gerdes.

Growing Conditions: Full sun and moist, well-drained soil

Size: 2-4 feet tall and wide

Zones: 3-8

French Marigold

Marigolds have long been go-to companions in veggie beds, but these low-maintenance annuals have a beauty that can stand alone. French marigolds (Tagetes patula) come in both pom-pom and single-petal forms, in solid yellow or a mix of fiery colors. There are also other types, including the taller African marigolds (Tagetes erecta), that offer yellow flowers. French marigolds thrive in garden beds and borders in hot summer heat and are deer-resistant.

Growing Conditions: Full sun and well-drained soil

Size: 6-24 inches tall and 6-18 inches wide

Zones: annual

Gerbera Daisy

Gerbera daisies exude optimism in any color, but yellow varieties look especially cheery. These tender perennials can grow year-round in a small number of Hardiness Zones but can also be grown as annuals anywhere. A favorite for cutting gardens, gerbera daisies are great in vases and can also be grown in containers.

Growing Conditions: Full sun and well-draining soil

Size: 6-18 inches tall and 8-16 inches wide

Zones: 8-10

Gladiolus

This old-fashioned flower, originally from South Africa, produces tall flower spikes in mid-summer. Plant gladiolus bulbs in a cutting garden to enhance your homegrown bouquets, or grow them wherever you need a bold splash of color.

Growing Conditions: Full sun and moist, well-drained soil

Size: 3-6 feet tall and 1-2 feet wide

Zones: 8-10

Goldenrod

A North American native, goldenrod (Solidago spp.) delivers masses of yellow color at the end of summer and fall, just as other parts of the garden may be fading. Each flowerhead is made up of tiny daisy-like flowers, which attract pollinators. Check that the variety of goldenrod you plant is suitable for your soil condition and moisture levels since needs vary by type.

Growing Conditions: Full to part sun and moist, well-drained soil

Size: 3-5 feet tall and 1-3 feet wide

Zones: 3-9

Hellebore

Yellow hellebores bring the sunshine to shady spots. Even better, these perennials bloom in winter and early spring, when there's not much else going on in the garden. Yellow varieties include double 'Sunshine Ruffles' (shown) and BHG Test Garden favorite 'First Dance' from the Wedding Party series.

Growing Conditions: Shade to part shade and moist well-drained soil

Size: 1-3 feet tall and wide

Zones: 4-9

Lantana

This plant's tiny tubular blooms, which come in yellow as well as other bright hues, are irresistible to lots of different pollinators. Lantana come in upright varieties, as well as trailing types that are great for hanging baskets.

Growing Conditions: Full sun and moist, well-drained soil

Size: 6-12 inches tall and 16-48 inches wide

Zones: 9-11

Ligularia

Got a soggy spot in the garden? Moisture-loving ligularia can handle it, and deliver eye-catching yellow flowers to boot. These deer-resistant blossoms are attractive to birds and pollinators, but deer avoid them. Depending on the type you choose, the plant may have tall stalks covered in small flowers, such as BHG Test Garden pick 'Midnight Lady,' or looser stalks with larger, daisy-like blooms.

Growing Conditions: Sun to part sun and moist soil

Size: 3-8 feet tall and 2-4 feet wide

Zones: 4-9

Moss Rose

Moss rose (Portulaca spp.) may be most recognizable in bright jewel tones, but for a sweet surprise, try a yellow variety. The rose-like flowers of this annual grow on trailing, succulent stems that are drought-tolerant.


Growing Conditions: Full sun

Size: 4-12 inches tall and 6-16 inches wide

Zones: annual

Pansies

Pansies pop up in spring and often bring a second round of color in fall. Their diminutive size makes these Viola hybrids an ideal filler in a cool-season container, especially in an easy accent color like yellow.

Growing Conditions: Full to part sun and well-draining soil

Size: 6-12 inches tall and 4-12 inches wide

Zones: 3-11

Petunias

Producing mounds of flowers for months, but also holding up well in tough conditions, petunias have earned their popularity. Plant petunias in full sun to keep them from getting lanky. Grandiflora petunias have large, showy blooms, while multiflora have a larger amount of smaller ones. Breeding work produces ever-more interesting varieties of this annual, such as yellow-flowered options in the Supertunia or Wave collections.

Growing Conditions: Full sun and well-draining soil

Size: 6-12 inches tall and 1-4 feet wide

Zones: annual

Primroses

The dainty flowers of primroses (Primula spp.) can grow in tight clusters, in a type known as "drumstick primrose," or a candelabra shape. There are more than 400 species of the flower in a rainbow of colors, including every shade of yellow. Primrose is deer-resistant but appeals to pollinators and birds, so it's a great addition to a shade garden.

Growing Conditions: Part sun or shade (some will tolerate full sun) and well-draining soil

Size: 6-24 inches tall and 6-18 inches wide

Zones: 2-8

Roses

A symbol of friendship, yellow roses also bring happy energy to the garden. There are tons of varieties to choose from, such as rambling, thornless 'Yellow Lady Banks' (shown) and more vibrantly hued and strongly fragrant 'Radiant Perfume'. Roses grow best in full sun with moist, well-drained soil rich in organic matter.

Growing Conditions: Full sun and moist, well-draining soil

Size: 2-9 feet tall and 2-15 feet wide

Zones: 3-10

Sunflower

Watching a single seed produce a skyscraping sunflower (Helianthus annuus) is a garden wonder that never gets old. Check the bloom time of the sunflowers you choose before planting since it can vary greatly by variety. These summer bloomers come in a huge number of cultivars, including petite branching types and others with two-tone flowers.

Growing Conditions: Full sun and moist, well-draining soil

Size: up to 10 feet tall and 1-3 feet wide, depending on variety

Zones: 3-11

Tropical Hibiscus

To make a backyard feel like a sun-soaked exotic getaway, plant a yellow tropical hibiscus (Hibiscus rosa-sinensis). The big-blooming shrubs thrive in the warmer climates (and even in colder ones, you can make them work by overwintering them indoors). These hardy plants can live up to 20 years.

Growing Conditions: Full sun and well-draining soil

Size: 8' to 15' tall; 4' to 8' wide

Zones: 9-11

Tulips

Planting tulip bulbs in the fall is like a gift to your future self: By spring, you'll be rewarded with some of the most joyful flowers around. You can choose from the more traditional Darwin type of tulips or go with something more unusual like the 'Yellow Spider' lily-flowered tulip (shown). Gerdes likes the multi-colored effect of 'Antoinette' tulip, which opens pale yellow, white, and green, and becomes streaked with pink over time.

Growing Conditions: Full or part sun and moist, well-draining soil

Size: 4-30 inches tall

Zones: 3-9

Violas

Sweet little violas (Viola tricolor) are irresistible when they start showing up in nurseries along with pansies at the beginning of spring and fall, especially in upbeat shades of yellow. Thriving in cool temperatures, they can be placed in beds or containers for early-season color. Edible violas can be used as garnishes in salads or desserts.

Growing Conditions: Full sun, part sun, or shade and moist, well-draining soil

Size: 2-12 inches tall and 4-10 inches wide

Zones: 2-11

Wishbone Flower

The yellow varieties of shade-loving wishbone flower (Torenia fournieri) light up darker spots in the garden. Hailing from southeast Asia, the plant is named for the wishbone shape its stamens form. The compact plant is a tender perennial but typically grown as an annual, blooming reliably from spring until frost. Wishbone flower comes in both trailing and upright varieties. Plant it with shade-loving impatiens and begonia.

Growing Conditions: Shade or part sun and moist, well-draining soil

Size: 6-16 inches tall and 6-24 inches wide

Zones: 10-11

Yarrow

Gardeners with tougher conditions, such as drought, cold temperatures, and poor soil, can still grow yarrow (Achillea spp.), a tough, flowering perennial. Yellow varieties like 'Moonshine' (shown here) work well in both cottage gardens and more naturalistic landscapes.

Growing Conditions: Full sun and average soil

Size: 6-24 inches tall and 2-3 feet wide

Zones: 3-10

Zinnia

One of the easiest flowers to grow from seed, zinnias are a go-to plant for beginning gardeners. For yellow hues, you can opt for a tall double variety such as 'Benary's Giant Golden Yellow', or a more dainty, daisy-like one, such as BHG Test Garden pick, 'Profusion Yellow' (shown here). Whichever type of zinnia you choose, it will attract tons of pollinators.

Growing Conditions: Full sun and well-draining soil

Size: 1-4 feet tall and 1-2 feet wide

Zones: annual