Agastache Seeds Ageratum Seeds Amaranth Seeds Armeria Maritima Seeds Artichoke Seeds Arugula Seeds Asparagus Seeds Aster Seeds
Baby's Breath Seeds (Covent Garden) Bachelor's Button Seeds Balloon Flower Seeds Banana Plants Barley Seeds Basil Seeds Basketflower Seeds Bean Seeds Bean Seeds, Common Bean Seeds, Fava Bean Seeds, Garbanzo Bean Seeds, Hyacinth Bean Seeds, Lima Bean Seeds, Long Bean Seeds, Runner Bean Seeds, Soy Bean Seeds, Winged Bee Balm Seeds Beet Seeds Bellflower Plants Bells Of Ireland Seeds Bitter Melon Seeds Blackberry Plants Blueberry Plants Bok Choy / Tatsoi Seeds Books and Catalogs Borage Seeds Boysenberry Plants Broccoli Seeds Brussels Sprouts Seeds Buckwheat Seeds Bulbs Burdock Seeds Butterfly Pea Seeds
Cabbage Seeds Calendula Seeds Canterbury Bells Seeds Carrot Seeds Catalog Cauliflower Seeds Celery Seeds Celosia & Cockscomb Seeds Chamomile Seeds Chervil Seeds Chinese Cabbage Seeds Chive Seeds Cilantro / Coriander Seeds Citrus Plants Clothing and Swag Clover Seeds Coleus Seeds Collard Seeds Collections Columbine Seeds Coreopsis Seeds Corn Salad Seeds Corn Seeds Cosmos Seeds Cowpea Seeds Craspedia Seeds Crocus Bulbs Cucumber Seeds
Daffodil Bulbs Dahlia Seeds Daisy Seeds Dandelion Seeds Dianthus Seeds Dill Seeds Dock or Sorrel Seeds Dragon Fruit Plants
Echinacea Seeds Eggplant Seeds Elecampane Seeds Endive Seeds
Fall Favorites Fennel Seeds Fenugreek Seeds Fertilizer Festivals and Tickets Fig Plants Flower Seeds Forget-Me-Not Seeds
Gaillardia Seeds Garlic Bulbs Gift Certificates Gifts and Supplies Goji Berry Seeds Gomphrena Seeds Goth Garden Gourd Seeds Grass Seeds Ground Cherry Seeds
Herb Seeds Hibiscus Plants Holiday Gift Collection Hollyhock Seeds Honeywort Seeds Horehound Seeds Huckleberry Seeds Hyacinth Bulbs
Iceplant Seeds
Jelly Melon Seeds Jewels of Opar Seeds Job's Tears Seeds Joseph's Coat Plants
Kale Seeds King of Bitters Seeds Kohlrabi Seeds
Lace Flower Seeds Lavender Seeds Leek Seeds Lemon Balm Seeds Lemongrass Seeds Lettuce Seeds Litchi Tomato Seeds Lovage Seeds Love-in-a-Mist Seeds
Marigold Seeds Marshmallow Seeds Marvel of Peru or Four O'Clock Seeds Melon Seeds Milkweed Seeds Mint Plants Mint Seeds Mizuna Seeds Molokhia Seeds Moonflower Seeds Moringa Seeds Morning Glory Seeds Mullein Seeds Mustard Seeds
Nasturtium Seeds Nicotiana Seeds
Okra Seeds Onion Bulbs Onion Seeds Online Seed Catalog Oregano Seeds Oyster Leaf Seeds
Pansy / Viola Seeds Papalo Seeds Papaya Plants Parsley Seeds Parsnip Seeds Passion Fruit Plants Pea Seeds Peanut Seeds Pepper Seeds Pepper Seeds, Hot Pepper Seeds, Sweet Petunia Seeds Phlox Seeds Pitcher Plant Rhizomes Pitcher Plant Seeds Plants Plants and Seeds Poppy Seeds Portulaca / Moss Rose Seeds Potatoes Primrose Seeds Ptilotus Seeds Purslane Seeds
Quinoa Seeds
Radicchio Seeds Radish Seeds Raspberry Plants Returning Seeds Rhubarb Seeds Rosemary Seeds Rudbeckia Seeds Rutabaga Seeds
Safflower Seeds Saint John's Wort Seeds Salpiglossis Seeds Salvia and Sage Seeds Savory Seeds Scabiosa Seeds Snail Vine Seeds Snake Bean Seeds Snapdragon Seeds Sorghum Seeds Sourdough Starter Spinach Plants Spinach Seeds Squash Seeds Squash Seeds, Summer Squash Seeds, Winter Stevia Seeds Stock Seeds Strawberry Plants Strawberry Seeds Strawflower Seeds Sunflower Seeds Sweet Pea Seeds Sweet Potato Plants Swiss Chard Seeds
Tamarillo Seeds, Dwarf Thyme Seeds Tomatillo Seeds Tomato Seeds Tomato Seeds, Blue & Purple Tomato Seeds, Cherry & Grape Tomato Seeds, Green Tomato Seeds, Orange Tomato Seeds, Pink & Red Tomato Seeds, Striped Tomato Seeds, White & Yellow Tong Ho Seeds Tools Toothache Plant Seeds Tulip Bulbs Turmeric Plants Turnip Seeds
Vegetable Seeds Vinca Seeds
Watercress Seeds Watermelon Seeds Wax Melon Seeds Wheat Seeds
Yarrow Seeds
Zinnia Seeds
Cosmos Seeds, Double Dutch Rose
Description
(Cosmos bipinnatus). We love these incredible rose-like flowers on this stunning cosmos variety from Holland. The ballerina-pink, semi- and fully-double blooms are a cheerful addition to any cottage garden or floral designs. It’s no wonder this variety is a favorite for cutting; the blooms are sturdy and stunning with long stems. Plants average 4 feet tall. A real standout in our trial gardens this last year, and a new favorite!Â
- Annual
- 60-90 days to maturity
- 6-8 hours of full sun
- Sprouts in 7-14 days
- Seed Depth: 1/8-1/4"
- Plant Spacing: 10"
- Ideal Temperature: 70-75 F
- Frost Hardy: No
Growing Tips, Tricks and FAQs
Growing Tips
Double Dutch Rose cosmos is an heirloom variety that thrives in warm weather. It prefers full sun and is highly drought tolerant once established. Plant in poor to moderate soil, and deadhead regularly to encourage continuous blooming. Avoid excessive fertilization, as too much nitrogen leads to foliage growth over flowers.
When to Grow
Cosmos should be planted only after the last frost, once the soil temperature is consistently at least 60 F for proper germination. Since cosmos are not frost-hardy, check your local area’s last frost date before planting. The plant grows quickly and typically starts blooming 60-90 days after sowing, with flowers appearing from midsummer until the first frost. If you’re uncertain about your frost-free dates, check out our blog post, ‘Our Experts Answer Questions, Share Resources.’
How to Sow and Plant
Cosmos seeds can be directly sown outdoors after the last frost or started indoors 3-4 weeks before transplanting. Sow seeds 1/8-1/4 inch deep, as they need light to germinate. Space plants about 10 inches to give them enough room for good airflow and healthy growth. Water lightly during germination, which typically takes 7-14 days. Choose a location with at least 6-8 hours of full sun daily for the best flowering results.
How to Grow
Double Dutch Rose cosmos thrives in well-draining, light soil and requires very little maintenance. It prefers moderate watering, so allow the soil to dry out between waterings to prevent weak, leggy growth. Avoid over-fertilizing, as too much nitrogen will encourage leafy growth instead of flowers. Taller plants may need staking in windy areas. For a longer blooming period, deadhead spent flowers regularly. This will encourage continuous blooms until the first frost.
How to Save
- Cosmos are insect pollinated, and there may be some crossing between varieties in the garden. You can enjoy the mixing or use caging techniques and hand pollination to avoid crossing.
- Saving seeds from cosmos is easy: simply allow the heads to brown and dry on plants and collect seeds. Store in a cool, dry, dark place over winter.
FAQ
How tall does Double Dutch Rose cosmos grow?
These plants can grow between 3-4 feet tall, making them a great option for adding height to garden borders.
Can Double Dutch Rose cosmos grow in shade?
Cosmos prefer full sun for the best blooms. While they can tolerate partial shade, it might result in leggy plants with fewer blooms.
Can Double Dutch Rose cosmos be used as a cut flower?
Yes! This variety makes an excellent cut flower, with long-lasting blooms that continue to open after cutting.
-
Was this review helpful?
Response from store
Similar Products
Checkout using your account
Checkout as a new customer
Creating an account has many benefits:
- See order and shipping status
- Track order history
- Check out faster