Cosmos sulphureus Seeds

Sulphur Cosmos Seeds

Add bright oranges and yellow to your late summer garden with Sulphur Cosmos. This annual variety thrives in any area and blooms until fall. Annual.
Zones1 - 10
Advantages
Native
Light Requirements
Full Sun
Half Sun / Half Shade
Mature Plant Size36-48" tall
Bloom TimeSummer to fall
ShippingMost orders ship within 48 hours. Learn More…
SizeNo
SKUHC015861

USDA Hardiness Planting Zones

To determine if a plant is sufficiently cold hardy, the USDA created numbered zones indicating winter low temperatures; the lower the zone number the colder the winter.

  • If the coldest winter temperature expected in your area is -15°F (zone 5) then any plants rated zones 3-5 will survive the winter temperatures in your area.
  • If you live in very warm winter areas (zones 9-11) plants with zones 3-4 ratings are not recommended. The lack of freezing winter temperatures do not provide a time for winter dormancy (rest).

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As low as $8.95
In stock
SKU
HC015861
Details
Sulphur Cosmos are a popular choice in meadows and gardens across the country. People love to press them for crafts and they make gorgeous summer bouquets. Blooming midsummer until frost, a field of Cosmos is a truly magnificent, colorful sight. Javelina resistant
More Information
Associated SKUsHC015861
HC013232 (1 Pound)
HC013233 (1/4 Pound)
Common Name
Sulphur Cosmos Seeds
Botanical Name
Cosmos sulphureus
Seed Life Cycle
Annual
Light Requirements
Full Sun, Half Sun / Half Shade
Flower Color
Orange, Yellow
Bloom Time
Summer to fall
Mature Height
36-48" tall
Ships As
Seed
Ideal Region
Northeast, Southeast, Midwest, West, Southwest, Pacific Northwest
Zones
1, 2, 3, 4, 5, 6, 7, 8, 9, 10
Non-GMO
Yes
Seed Coverage
1/4 lb covers 777 sq ft.
1 lb covers 3,110 sq ft.
Soil Type
Sandy Soil, Loamy Soil, Drought/Dry Soil
Soil Moisture
Dry, Average, Well Draining
Advantages
Native
Additional Information
O
Ships To Canada
Yes
Planting Guides

Step-by-Step Wildflower Seed Planting Instructions

  1. Check for your last frost date and plant after this has passed. Choose a spot on your property that gets 6 or more hours of direct sun a day unless you are planting seeds for shade.
  2. Prepare your soil by clearing the area of all existing growth. Simply dig up everything that is growing, turn the soil and rake the area flat. If this is an area that has never before been gardened, you may need to till the area up to remove growth.
  3. Mix the seeds with sand* for better visibility and scatter the seeds directly on top of the soil. If you are sowing a larger area, we recommend using a seed spreader; if not, you can sow by hand.
  4. We recommend lightly compressing the seeds into the soil, making sure not to bury them. You can either walk on them, use a board or if you are sowing a larger area, rent a seed roller.
  5. Water so that the soil is moist, not soaking wet, until the seedlings are about 4-6" tall. After that, the seedlings will survive on natural rains. If you are experiencing very dry weather, we recommend watering occasionally.
Get more information on Planting Wildflowers
View more Planting Guides, or download our complete Planting Guide for tips on caring for your plants when you receive your order, as well as planting instructions for Perennials, Spring-Planted Bulbs, Fall-Planted Bulbs, Cacti & Succulents, Xeric Plants and more.
Shipping
Most orders ship within 48 hours.

As soon as your order is placed you will receive a confirmation email. You will receive a second email the day your order ships telling you how it has been sent. Orders for in-season products ship within 48 hours or less. Depending upon your order date, we may hold your shipment to combine it with other products on your order, if applicable. See our shipping information page for approximate ship dates and more detailed information. If you need express shipping or have any questions, please call Customer Service toll-free at (800) 925-9387 or contact us by email.

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