Cosmos sulphureus Seeds (Bright Lights Cosmos)

Bright Lights Cosmos (Cosmos sulphureus) is a vibrant plant species known for its striking appearance and fiery colors. Commonly referred to as Sulphur Cosmos or Orange Cosmos, it showcases large, daisy-like flowers with bright hues of orange, yellow, and red. Growing up to 3 feet tall, this annual beauty thrives in full sun and well-drained soil, while being tolerant of poor soil conditions. It attracts butterflies and hummingbirds, adding a lively touch to any garden. Bright Lights Cosmos can be grown in USDA hardiness zones 3-11 and can easily be propagated from Cosmos sulphureus seeds.

Growing Cosmos sulphureus from Seed

• Growth cycle: Annual
• Watering: Medium
• Sunlight: Full Sun
• Suitable climates: Arid, Humid Continental, Humid Subtropical, Mediterranean, Subarctic, Tropical Wet & Dry
• Where to grow: Indoor & Outdoors
• Flower color: Orange

Germinating Bright Lights Cosmos Flower Seeds

To germinate Cosmos sulphureus, sow the seeds in well-draining soil about 1/4 inch deep. Keep the soil moist, maintain a temperature between 70-85°F, and provide bright indirect sunlight. Germination typically occurs within 7-10 days.

We source all of our Cosmos sulphureus seeds from a small greenhouse facility based in southeastern Maine and store them in a dark, temperature-controlled environment before shipment. You’ll find that our fresh Bright Lights Cosmos seeds are much easier to germinate than the mass-produced packets of flower seeds found in stores! If you have any trouble growing Bright Lights Cosmos seeds, we’re happy to send you additional gardening tips. In the (unlikely) event that your Cosmos sulphureus seeds do not germinate at all, we’ll give you a full refund, no questions asked.

We offer this variety on Etsy and eBay, as well!

Shipping & returns

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