COSMOS SEEDS

Mexican aster

Cosmos bipinnatus, C. sulphureus

How to plant Cosmos seeds

Reasons why you'll love growing cosmos:

  • Cosmos are easy to start from seed, and will often self-sow.
  • Plants are easy to grow and maintain. Cosmos will grow in hot sun and poor soil, and will withstand drought conditions.
  • Cosmos are beautiful and diverse. Flowers come in an amazing variety of bright colors and unique styles. Plants grow as 12-inch dwarfs, 4-foot giants, and many sizes in between.
  • Flowers attract beautiful friends to our gardens: birds, bees, and butterflies love cosmos.
  • Cosmos look good most anywhere. In containers, flower beds and borders, or as cut flowers in your home.
Sonata Purple Shades cosmos seeds New for 2018 AN18001

SONATA PURPLE SHADES Cosmos Seeds

Sonata Purple Shades is a new, heavy flowering dwarf cosmos which is covered in 3 in. purple, fade-resistant flowers with gently frilled petal tips. The 2 ft. tall plants bloom all summer, are tidy, extremely heat resistant, and easy to grow.

30 seeds - $2.99
Qty:

Rubinato cosmos seeds
Rubinato cosmos flowers Cosmos Rubinato - contrasting shades of flowers
AN15662

RUBIN­ATO Cosmos Seeds

An improvement of the much loved Rubenza cosmos. Dark-red, semi-double and single flowers on compact and well-shaped 24-30 in. tall plants. Rubinato cosmos will add rich color to your containers and borders. A Fleuroselect Approved Novelty for 2016. Visit the SGS blog to read about our experience growing Rubinato cosmos, plus view photos from the test garden.

30 seeds - $3.49
Qty:

Double All Sorts Mix cosmos seeds
Cosmos seeds - Double All Sorts Mix Cosmos Double All Sorts Mix
New CSM0003

DOUBLE ALL SORTS MIX Cosmos Seeds

Can’t decide? Double All Sorts Mix gives you a diverse blend of colors, flower forms and patterns, including picotees and stripes, to fill your vases and brighten your garden beds. Heat tolerant plants grow 3-4 ft. tall.

50 seeds - $3.49
Qty:

Cosmos Sweet Sixteen
Cosmos Sweet Sixteen Sweet Sixteen cosmos seeds
New CSM0001

SWEET SIX­TEEN Cosmos Seeds

Blush pink flower petals with bright pink picotee margins. A beautiful double frill is at the center of each bloom. Sweet Sixteen cosmos provides plenty of distinctive cut flowers for your vase. Growth is bushy, up to 3 ft. or more tall.

50 seeds - $3.49
Qty:

Dwarf Cosmos

Smaller Growing Cosmos for Bedding and Containers.

COSIMO SERIES Cosmos Seeds Cosmos bipinnatus

Flowering in as little as 8-12 weeks from seed, the Cosimo series is one of the first cosmos to come into bloom. The heavy-flowering, 18-24 in. tall bushy and compact plants produce impressive masses of blooms. Flowers are excellent for cutting. Use Cosimo cosmos in garden beds or containers, where plants will bloom all summer long. All 3 Cosimo cosmos varieties have been designated as a Fleuroselect Approved Novelty.

Cosimo Purple Red-White cosmos seeds AN11022

COSIMO PURPLE RED­-WHITE Cosmos Seeds

Purple-red flowers with white highlights. Space-saving plants grow 1½-2 ft. tall. A Fleuroselect Approved Novelty.

30 seeds - $3.49
Qty:

Cosimo Collarette cosmos seeds AN11023

COSIMO COLLAR­ETTE Cosmos Seeds

Semi-double pink and white bicolor flowers. A dainty central collar of smaller petals lends special appeal Cosimo Collarette cosmos. A Fleuroselect Approved Novelty.

30 seeds - $2.99
Qty:

Cosimo Purple Red cosmos seeds AN11024

COSIMO PURPLE RED Cosmos Seeds

Deep purple-red flowers on 18-24 in. tall plants. A Fleuroselect Approved Novelty.

30 seeds - $3.49
Qty:

Cosimo Pink-White cosmos seeds AN15663

COSIMO PINK­-WHITE Cosmos Seeds

Early-flowering blooms in a dynamic blend of white flowers with pink picotee edges and pink blooms streaked with white. Flowers in as little as 8-12 weeks from seed, one of the first cosmos to bloom. Heavy flowering, 18-24 in. tall plants produce impressive masses of flowers that are excellent for cutting.

30 seeds - $3.99
Qty:

SONATA SERIES Cosmos Seeds Cosmos bipinnatus

Heavy-blooming, dwarf 2 ft. tall plants are covered in large 3 in. flowers. Petal tips are gently frilled. Plants bloom from late spring into early autumn, are extremely heat tolerant and versatile. Sonata cosmos are excellent choices for containers and cut-flower gardens. Or use these well-shaped plants to edge paths, mass in beds, or blend into borders.

Sonata Mix cosmos seeds AN10200

SONATA MIX Cosmos Seeds

A formula mix of four Sonata series colors: white, pink with dark eye, lavender pink, and magenta. Easy to grow plants reach 24 in. tall.

30 seeds - $2.99
Qty:

Sonata Carmine cosmos seeds AN09155

SONATA CARMINE Cosmos Seeds

Highly-colorful magenta flowers assure that Sonata Carmine cosmos will stand out in your garden. Low-growing plants to 2 ft. tall. A Fleuroselect Approved Novelty.

30 seeds - $2.99
Qty:

Sonata White cosmos seeds AN01299

SONATA WHITE Cosmos Seeds

Eye-popping, clean bright-white flowers cover the neat 2 ft. tall plants. A Fleuroselect Gold Medal winner (Europe's top prize).

30 seeds - $2.99
Qty:

Sonata Pink Blush cosmos seeds AN11678

SONATA PINK BLUSH Cosmos Seeds

Sonata Pink Blush is a particularly appealing cosmos; the soft-pink flower petals are blushed darker at the base. Dwarf plants grow to 2 ft. tall.

30 seeds - $2.99
Qty:

POP SOCKS SERIES Cosmos Seeds Cosmos bipinnatus

Each Pop Socks cosmos produces remarkable single, semi-double, and anemone-shaped flowers throughout the season. 'Knee high' varieties, Pop Socks cosmos grow 24-28 in. tall.

White Pop Socks cosmos seeds AN15007

WHITE POP SOCKS Cosmos Seeds

Radiant-white flowers are stunning. Knee-high plants grow 24-28 in. tall.


Sorry, out of stock


Pink Pop Socks cosmos seeds AN14007

PINK POP SOCKS Cosmos Seeds

Perfect-pink flowers on dwarf 24-28 in. tall plants.


Sorry, out of stock



Hot Pink cosmos seeds AN15096

HOT PINK Cosmos Seeds

Compact, tidy 24 in. plants bloom in the brightest cerise pink. Great for containers or borders; makes a very nice cut flower.

30 seeds - $2.99
Qty:

Capriola cosmos seeds AN15661

CAP­RIOLA Cosmos Seeds

Large white flowers with a light-red picotee and dark-red centers. Some blooms will show central collarettes. The heavy flowering, dwarf plants grow 24-30 in. high. A Fleuroselect Novelty Award winner for 2016.

30 seeds - $3.49
Qty:

Cosmos for Backgrounds & Cut Flowers

Tall Cosmos with long, strong stems.

DOUBLE CLICK SERIES Cosmos Seeds Cosmos bipinnatus

We did a double take when we first discovered these free-blooming 4 ft. tall flower machines. The impressive, large and frilly, semi-double to fully double flowers are excellent for cutting. Double Click cosmos will provide vases-full of fun from summer until frost.

Double Click Rose Bon Bon cosmos seeds AN10939

DOUBLE CLICK ROSE BON BON Cosmos Seeds

Rosy-lavender flowers on heavy-blooming 4 ft. tall plants.

25 seeds - $3.49
Qty:

Double Click Snow Puff cosmos seeds AN11920

DOUBLE CLICK SNOW PUFF Cosmos Seeds

Pure-white blooms add a wow factor to your bouquets and borders. Plants grow to 4 ft. tall.

25 seeds - $3.49
Qty:

Double Click Mix cosmos seeds AN08013

DOUBLE CLICK MIX Cosmos Seeds

A formula mix featuring flowers in shades of rosy-red, rosy-lavender, and white.


Sorry, out of stock


SENSATION TYPE Cosmos Seeds Cosmos bipinnatus

Large 3-4 in. daisies with yellow centers bloom in summer and fall. Heavy-blooming, self-cleaning 4-5 ft. tall plants.

Candy Stripe cosmos seeds AN06039

CANDY STRIPE Cosmos Seeds

Irresistible garden candy canes; red and rose stripes on a blush-white background. No two flowers exactly alike. Plants grow 3-4 ft. tall.

200 seeds - $2.49
Qty:

Sensation Mix cosmos seeds AN00203

SEN­SATION MIX Cosmos Seeds

Field mix of flowers in shades of carmine-red, white, pink, and rose. Sensation Mix also includes showy bicolor blooms. Plants grow 4-5 ft. tall.

400 seeds - $1.99
Qty:

Picotee cosmos seeds AN00198

PICOTEE Cosmos Seeds

One of the most beautiful of all cosmos. Pure-white 3 in. wide flowers are stylishly dressed in shades of rich rosy red. Picotee is a splendid, softly-colored background plant which grows to 4 ft. tall.

200 seeds - $2.49
Qty:

Purity cosmos seeds AN02022

PURITY Cosmos Seeds

Very large 4 in. wide white flowers are held on heavy-blooming 4-5 ft. tall plants. For the garden, Purity cosmos is a virtue.

200 seeds - $2.49
Qty:

Daydream cosmos seeds AN00191

DAY­DREAM Cosmos Seeds

Ponder opulent 4-5 ft. tall towers covered in pleasing pale-pink flowers. Unique rosy-pink bullseyes capture the attention of all. Sturdy, healthy plants are heavy blooming and self cleaning.

200 seeds - $2.49
Qty:

Gloria cosmos seeds AN00194

GLORIA Cosmos Seeds

Gloria is a garden show-off. Rose-pink petals and piercing crimson eyes easily charm all that visit. Heavy flowering, healthy and reliable 4-5 ft. tall plants.

200 seeds - $2.49
Qty:

Dazzler cosmos seeds AN02374

DAZZLER Cosmos Seeds

Dazzler cosmos introduces high voltage color into your garden. The deep carmine-red daisies appear in summer and fall. Plants are tough and heavy-blooming, grow to 4 ft. tall.

200 seeds - $2.49
Qty:

Cosmos Radiance
Cosmos Radiance flowerRadiance cosmos flower
AN14008

RADI­ANCE Cosmos Seeds

Radiance is an exuberantly colored heirloom cosmos. Red-purple eyes highlight the brilliant deep rose-pink flowers. Radiance cosmos reaches 4-5 ft. tall.

200 seeds - $2.49
Qty:

PSYCHE SERIES Cosmos Seeds Cosmos bipinnatus

Frilly and scalloped, semi-double and single, 3-4 in. flowers with golden eyes. Plants are lush and bushy, grow 4-5 ft. tall. The Psyche series includes some of the most beautiful cosmos we have grown to date.

Psyche Mix cosmos seeds AN10892

PSYCHE MIX Cosmos Seeds

A formula mix of 3-4 in. wide crimson, rich lavender-pink, and white flowers. The bushy plants grow 4-5 ft. tall.

200 seeds - $2.99
Qty:

Psyche White cosmos seeds AN09331

PSYCHE WHITE Cosmos Seeds

Extraordinary bushy and branching, 4-5 ft. tall plants are covered in pure-white flowers with sunny golden-eyes.


Sorry, out of stock


VERSAILLES SERIES Cosmos Seeds Cosmos bipinnatus

Tall 3-4 ft. tall plants produce a wealth of 4 in. wide blooms on long, strong stems. Versailles cosmos are superb cut flowers.

Versailles Red cosmos seeds AN02024

VER­SAILLES RED Cosmos Seeds

Rich and majestic bright-red 4 in. flowers are held atop long, strong necks. They are superb for cutting. Plants grow to 4 ft. tall.

200 seeds - $3.49
Qty:

Versailles Flush cosmos seeds
Versailles Flush cosmos seeds Versailles Flush cosmos seeds
AN06038

VERS­AILLES FLUSH Cosmos Seeds

Four in. white flowers blush rose. Blooms add class to any bouquet. Lush, bushy plants grow to 4 ft. tall.


Sorry, out of stock



Sea Shells cosmos seeds AN00200

SEA SHELLS MIX Cosmos Seeds

Sea Shells Mix cosmos produce large and impressive fluted-blossoms in a broad range of solids and bicolors. They are exquisite cut flowers. Plants bloom in summer and fall, grow to 4 ft. tall.

200 seeds - $2.49
Qty:

Sulphur Cosmos Cosmos sulphureus

Tall or dwarf summer blooming annuals. Flowers are in highly combustible shades of orange, yellow, or scarlet red.

Bright Lights cosmos seeds AN01221

BRIGHT LIGHTS Cosmos Seeds

Fiery semi-double 2½ in. blooms in shades of scarlet orange, golden orange, gold, and yellow. Flowers are excellent for cutting, butterflies love them. Plants grow 3-4 ft. tall. Packet is ⅛ ounce, about 350 seeds.

⅛ Ounce - $2.99
Qty:

Ladybird cosmos seeds AN12072

LADY­BIRD Cosmos Seeds

Semi-double blossoms in smoldering shades of scarlet orange, orange, and yellow. Flowers attract butterflies. Easy-to-grow plants grow to 16-24 in. tall.

200 seeds - $2.99
Qty:

COSMIC SERIES Cosmos Seeds Cosmos sulphureus

Vast numbers of radiant 2 in. double and semi-double flowers on well-proportioned, space-saving 12-20 in. tall plants. Summer blooming.

Cosmic Orange cosmos seeds AN00050

COSMIC ORANGE Cosmos Seeds

Intense orange flowers on bushy 12-20 in. tall plants. Cosmic Orange cosmos is an All-America Selections Winner.

50 seeds - $2.99
Qty:

Dr. Allan Armitage discusses Cosmos bipinnatus.

Back to Top

How to Plant Cosmos Seeds

Bee introduces how to plant

Sow Cosmos: Sow cosmos seeds in cell packs or flats, 4 to 6 weeks before transplanting into the garden. Kept at 70 to 85° F., germination is in 7 to 21 days. Can direct sow cosmos into prepared seed beds in rows, after all danger of frost. Thin seedlings to 12 to 18 inches apart. A less efficient but easier method of sowing cosmos: scatter seeds. Rake seeds into soil, keep area moist until germination.

Grow cosmos like a pro: Tip for bringing your cosmos plants into bloom up to 3 weeks earlier, growing under fluorescent lights: once seeds have germinated provide 11 hours per day of artificial light. Keep seedlings in complete darkness for the remaining 13 hours. After 2 weeks, keep the lights on for 14 or more hours per day.

Grow Cosmos: Full sun. Plants tolerate heat, drought, and poor soil. Most blooms produced with moderate water in soils of average fertility. Remove spent blossoms to promote additional flowering. Will usually self-sow if some spent blossoms are kept on plants. Excellent cut flowers, last 7 to 10 days when blooms are cut as petals unfold. Flowers fully open in vase. Rarely bothered by pests or disease. Cosmos attract birds, bees and butterflies.