Bright Lights Blend Cosmos Seeds


4.4285714285714 out of 5 stars
(14 reviews)
Availability: In Stock
Bright Lights is a cosmic beauty show from midsummer until first frost. Vibrant, bold, 2 ½" flowers on 36" plants attract butterflies and hummingbirds that flock to the nectar from the blossoms. Cosmos are a superb choice for wildflower and naturalized areas, as they are drought tolerant, and neglect is the kind of care they prefer! An excellent cut flower.
$1.99 1 gram (~100 seeds)

Botanical Name: Cosmos sulphureus

Family: Asteraceae

Native: Mexico

Hardiness: Annual

Plant Dimensions: 36" tall, 18"-36" wide

Variety Information: 2½" flowers in a blend of yellow, golden, golden-orange, and scarlet-orange

Exposure: Full sun

Bloom Period: Summer to frost

Attributes: Attracts Hummingbirds, Attracts Pollinators, Cut Flower, Drought Tolerant

When to Sow Outside: RECOMMENDED. 1 to 2 weeks after your average last frost date, and when soil temperature is at least 60°F.

When to Start Inside: 4 to 6 weeks before your average last frost date.

Days to Emerge: 5–10 days

Seed Depth: Barely cover

Seed Spacing: A group of 3 seeds every 12"

Thinning: When 1" – 2" tall, thin to 1 every 12"

Harvesting: For longest vase life, harvest in the morning and cut stems just as flower buds begin to open.

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Bright Lights Blend Cosmos Seeds Reviews

14 reviews

These guys love the Florida heat

5 out of 5 stars Jul 8, 2018
Florida's heat and summer sun makes these guys laugh! These flowers profusely self sow and I never need to water them, even in the middle of the summer. The blooms last for an extended period of time and a single plant will bloom for weeks. The butterflies and bees love this variety.
Tara P from FL

Vibrant color

5 out of 5 stars Jul 21, 2018
This plant is so delightful! I could not be more pleased with it. The colors are amazing. I planted these seeds in a box for cut flowers, and they are quite prolific. First time growing cosmos, will definitely buy again.
Cate from IN

Cosmos Bright Lights

5 out of 5 stars Sep 12, 2018
We always include this plant in our flower beds as well as vegetable plantings since we've found it to be an excellent pollinator flower --bees love it - also woks for flower arrangements - a lovely flower and great garden staple
Milli Wright from CA

Beautiul Cosmos

5 out of 5 stars Jun 11, 2019
I planted this Bright Lights Blend Cosmos Seeds and the Seashell too, but this cosmos flowered first. It's radiant red and yellow and elegant as shown in the photos. Thank you for the healthy seeds. I love all Botanical Interests seeds that I have grown!
Thimy from CA

Love, Love, Love

5 out of 5 stars Jun 19, 2019
I saw these in a neighbor's garden about 8 years ago and fell in love with them. They re-seed great, are drought tolerant, attract pollinators, and hold up pretty well in a flower arrangement. They also provide seeds for hungry birds in the fall. I love adding them to the veggie garden, as well as flower beds.
Lindsey from CO

Loved Them

5 out of 5 stars Jul 10, 2019
Absolutely loved them. So easy to grow, and they did great in containers. They even sprung up in the cracks in the pavement, I must have dropped some seeds there by accident. Loved the brilliant colors, and they bloomed for months on end. Water and deadheading were the only care they received.
Kristy from CA

Beautiful and Enchanting

5 out of 5 stars Jul 18, 2019
I fell in love with this flower years ago when I saw a house in my neighborhood with a 20 foot bed chock full of bright orange flowers. She told me they were cosmos and offered me seeds, but at the time I wasn't patient enough to start seeds. I just bought plants. Fast forward I'm now learning to grow things from seed. I'm in zone 10 A Florida and started these seeds towards the end of May in jiffy pots and then carefully transplanted them in ground after two weeks. I cannot believe that it's been only 58 days from seed to now and I've got a gorgeous 3 foot tall patch chock full of beautiful gold, yellow, orange and sunset colored blooms. I actually got my first few blooms at only 44 days. I think it was far too hot in my zone to seed start as late as I did as in was in the high 80s in May but nevertheless these seeds still grew, and are withstanding temps now in the 90s as well as our tropical rainstorms. So I think these seeds are absolutely superb quality. These are also great for Florida gardeners because they are definitely a flower that can easily handle our hot and humid climate.
Pauline Decourbe from FL

Very easy to grow

5 out of 5 stars Apr 24, 2021
These flowers are beautiful. They grew to 5 feet in my garden in the full sun. They will self-seed easily, but are not difficult to move or pull if you end up with too many (how could you every have too many?).
Rebecca from MD


5 out of 5 stars Nov 12, 2021
Very easy, predictably cheery, bright, long lasting throughout srason
Laura from WA
Owner Response: Thanks so much for sharing your experience!

It was most likely my errror...

1 out of 5 stars Feb 25, 2022
sadly these did not germinate for me. i did direct sow in the garden. not sure the issue since all other seeds did well so i'm guessing it was something i did!
Cassy from CO
Owner Response: Hi Cassy, We are sorry these seeds didn't germinate for you. These seeds should be sown once the soil is at least 60 degrees F (different than air temp.) and should just barely be covered for success. Because seeds are shallowly sown watering will need to be frequent (once or more a day) to keep the soil moist around the seeds. A customer service agent will contact you by email to help. Rest assured, quality is very important to us and we have our seeds tested frequently to ensure germination rates meet federal and our own standards.


1 out of 5 stars Mar 17, 2022
Why doesn't botanical interest ever notate when species are invasive in some parts of north america, like this one?
Briana from CO
Owner Response: Hello Brianna, As fellow plant lovers, this is an important topic to us too. If we learn that a certain species is invasive to a particular area, then we do not sell that plant in that region. For example, you will not see morning glories in our garden center displays in Arizona and the website product pages note that morning glories cannot be shipped to Arizona. Cosmos sulphureus is not listed on the USDA's most recent edition of the State Noxious Weeds Seed List. It may have been on Tenessee's watch list over a decade ago but was never declared invasive which would make it illegal to sell in the noted area, like morning glories are in AZ. We hope this clarifies things. Happy gardening!

Happiness in a flower

5 out of 5 stars Jul 10, 2022
These seeds grew into sturdy brightly colored flowers. Standing at 3-4 feet tall and reaching 2 ft wide they are a lovely addition to my food garden. I planted them to bring beneficial insects to my vegetable plants and these Cosmos have done a wonderful job doing just that. The add color and joy to the garden.
Helen from CA

A solid performer

5 out of 5 stars Aug 23, 2022
I have grown these for two years and they are stunning. I wish I could upload a photo. They are all kinds of beautiful orange colors.
Nichole from CO

Glowing Orange

5 out of 5 stars Sep 24, 2022
First time planting this variety. The bright orange blossoms were first to bloom and are still blooming in late September. Planted with Amaranth for an unusual combination.
Margaret from OH

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