Exposure Full-sun or very light shade
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Cleome hassleriana. Big clusters of light pink flowers with reddish highlights and very long stamens appear above erect stems with spirally arranged leaves. You might not even notice the plant until the first flowers open - like roman candles in the garden! The flowers are very exotic looking, with quite a unique structure. Plants from Spider Flower Cleome seeds grow as tall as 150cm (60"), but usually a bit shorter on the coast. Spider Flowers are attractive to hummingbirds and beneficial insects. This native of southern South America is too tall for most containers, but it sure looks good planted in small groups in the garden.
Annual
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Latin
Latin
Cleome hassleriana, C. serrulata, and many others
Family: Cleomaceae
Difficulty
Difficulty
Easy
Season & Zone
Season & Zone
Exposure: Full sun or very light shade
Timing
Timing
Start indoors from 6-8 weeks prior to the last frost date for transplanting (or simply direct sow) 3-4 weeks after last frost. If direct sowing, consider repeating every two weeks into early summer for a longer bloom period. Seeds will sprout in 10-14 days.
Starting
Starting
Sow on the surface of the soil. If starting indoors, seeds benefit from vernalization: Place seeds on the surface of moistened, sterilized seed starting mix in pots, and place pots in zip-top plastic bags inside the refrigerator for 2 weeks. Then move pots to bottom heat and maintain soil temperature at 21-25°C (70-75°F) until germination. Provide bright light.
Growing
Growing
Cleome is quite an undemanding annual. The stems are usually very strong and upright, but might benefit from support in very windy, exposed gardens.
West Coast Seeds is a family-owned company that embraces an organic lifestyle. A group of imagination catalysts and passionate educators, dedicated to producing products and services that better the environment. As part of our mission to repair the earth, we aim to inspire and empower people to take responsibility for the state of the planet. For us, organic is about much more than saying no to chemicals, it is about saying yes to building a healthy soil for the future.
For over 35 years, we have upheld our strong reputation as a leading seed supplier, seeking out the highest quality untreated seeds for organic growing and putting them through rigorous independent testing. We built our company on the exchange of generational wisdom in a masterclass community of newbies and masters alike. Our world may have changed, but our commitment to our people, our customers, and our planet has not.
We’re a values-based business that has blossomed into a lifestyle ethos, with products that support seeders, feeders, keepers, and the tiniest of creepers. Our mission? To mobilize the next generation of gardeners with products that nourish soil and grow vigorous, sustainable gardens. We believe all plants should be grown without the use of chemicals, and that the seeds we supply are an important component of regenerative gardening.
We don’t just offer seeds, we offer experience, insight, and understanding. From timeless garden wisdom to new tech know-how, this is learning on the job: knowledge gleaned not from the pages of a book but from burying our fingers in the soil. We test, experiment, observe and adapt, never happier than when we get to share what we’ve learned with others.
Gardens don’t just grow seeds. They grow minds and imaginations, people and communities. Our vision encompasses both the micro and the macro. We eat locally, protect pollinators, teach people to grow from seed, and support regional biodiversity. We think big but act small and deliver unexpected impact — always with community and purpose.
At West Coast Seeds we believe in the power of small and that little can be large. Like the tiniest seed germinates to evoke incremental change with massive potential, so to can our community of gardeners and growers together. Gardeners are the earth’s stewards, planting seeds of creative declaration. The soil provides the canvas, we provide the seeds.
Start indoors from 6-8 weeks prior to the last frost date for transplanting (or simply direct sow) 3-4 weeks after last frost. If direct sowing, consider repeating every two weeks into early summer for a longer bloom period. Seeds will sprout in 10-14 days.
Sow on the surface of the soil. If starting indoors, seeds benefit from vernalization: Place seeds on the surface of moistened, sterilized seed starting mix in pots, and place pots in zip-top plastic bags inside the refrigerator for 2 weeks. Then move pots to bottom heat and maintain soil temperature at 21-25°C (70-75°F) until germination. Provide bright light.
Cleome is quite an undemanding annual. The stems are usually very strong and upright, but might benefit from support in very windy, exposed gardens.
