Plants that bloom in May in Zone 4 with yellow flowers

Apeldoorn Tulip

Bold, goblet-shaped Darwin hybrid in scarlet with a black base. Strong stems and long-lasting.

Ballerina Tulip

Lily-flowered tulip with pointed petals in vivid tangerine. Sweetly orange-scented and one of the longest-blooming tulips you can plant.

Bartzella Peony

Intersectional Itoh hybrid with huge lemon-yellow double blooms and red flares at the center. Strong stems hold up to 50 flowers per plant.

Basket-of-Gold

Bright golden-yellow cascades over walls and rock edges in spring. Cut back after flowering to stay tidy.

Butter and Sugar Siberian Iris

Cream-white standards over butter-yellow falls. The first dependable yellow-and-white Siberian iris ever introduced.

Calendula

Bright daisy-like blooms in pumpkin orange and gold. Edible petals brighten salads and the plant keeps blooming through cool weather.

Chamomile

Tiny daisy flowers with apple-scented foliage. Brew into tea or let it naturalize between pavers.

Cliffrose

Creamy white rose-like flowers with sweet fragrance and feathery seed plumes on a tough Rocky Mountain native.

Columbine

Delicate, spurred flowers that dance on wiry stems. Hummingbird favorite.

Coral Charm Peony

Semi-double blooms open vivid coral-peach, age through apricot, and fade to soft butter cream. A color shift unlike any other peony.

Coral Sunset Peony

Deeper, longer-lasting coral than Coral Charm with semi-double form. The flowers hold their warm tones for nearly two weeks.

Daffodil

Cheerful trumpets that naturalize beautifully and return stronger each year.

Dutchman's Breeches

Finely cut foliage and clusters of puffy white pantaloon-shaped flowers in early spring. A charming ephemeral that disappears by summer.

Epimedium

Delicate fairy-wing flowers above leathery foliage. One of the toughest dry shade groundcovers.

Fawn Lily

Mottled leaves and nodding white flowers with swept-back petals emerge in early spring from Pacific Northwest woodlands.

Foxglove

Stately spires of spotted, bell-shaped flowers. Cottage garden royalty.

Happy Returns Daylily

Lemon-yellow rebloomer with light fragrance. A bit taller than Stella with softer color.

Honeysuckle

Tubular, nectar-rich flowers with a fragrance that defines summer evenings.

Iris

Elegant sword-leaved perennials with intricate, ruffled blooms.

Kerria

Cheerful golden-yellow pompoms on bright green stems that stay vivid green all winter. One of the easiest shade-tolerant shrubs.

Krinkled White Peony

Single bowl-shaped flowers with crinkled white petals around a brilliant yellow boss of stamens. Elegant, airy, and adored by bees.

Lady's Mantle

Chartreuse frothy flowers and pleated blue-green leaves that hold water droplets like mercury. The ultimate filler plant.

Lemon Chiffon Peony

Intersectional Itoh hybrid with pale lemon-yellow semi-double blooms. Bartzella's softer-toned sibling with the same strong stems and long bloom.

Lewisia

Succulent rosettes with brilliant striped flowers in hot sunset colors. Must have perfect drainage or it rots.

Lupine

Dramatic spikes in every color. Short-lived but self-seeds generously.

Marsh Marigold

Glossy buttercup flowers in early spring along streams and wet areas. One of the first wetland bloomers.

Petunia

Cascading color for containers and beds. Blooms nonstop until frost.

Portulaca

Succulent-leaved sun lover with silky rose-like blooms that thrives where pavement, rock, or sand defeats everything else.

Queen of Sheba Tulip

Lily-flowered tulip with pointed petals in glowing red edged with gold. Lights up the late spring border like a flame.

Rose

The queen of the garden. Modern varieties are surprisingly low-maintenance.

Snapdragon

Vertical flower spikes with squeeze-open blooms. Kids love them.

Stella de Oro Daylily

The most planted perennial in America. Compact, reblooming, and basically indestructible.

Tulip

The classic spring icon in almost every color imaginable.

Western Red Columbine

Scarlet and yellow spurred flowers that hummingbirds follow through the Pacific Northwest's mountain meadows.

Wild Columbine

Nodding red-and-yellow spurred flowers that hummingbirds love on a self-sowing native that naturalizes along woodland edges.