C. sulphureus. The intense dazzling yellow to reddish orange single flowers on this striking species Cosmos attracts bumblebees, birds, and beneficial insects, and looks terrific in a cut flower bouquet. Plant Bright Lights cosmos seeds in full sun. It’s easy to grow in a variety of soils – tend towards the dry side. Its natural drought tolerance makes it a good candidate for xeriscaping. Plants grow to about 1m (3′) tall, for the middle or front of a mixed border. Mix Bright Lights with dark blue and purple flowers like Blue Boy Centaurea or Rocket Larkspur Delphiniums for eye-catching contrast.
Cosmos will flower more in poor soil, rather than rich, so avoid manures and fertilizers. Pinch out the growing point when plants are around 45cm (18″) tall to encourage bushier growth and more flowering points. Water during very dry spells, but otherwise, Cosmos is well suited to xeriscaping. Cosmos seeds are easy to harvest and save. These annual plants are sometimes referred to as Cosmea. Continue reading below for tips on how to grow Cosmos from seed.
Cosmos bipinnatus & C. sulfureus
Planting: Scatter the seeds around the planting area and cover lightly with soil, no more than 1/4 inch. Space the seeds 12 to 18 inches apart.
Cosmos can appear in single or double blooms and are easy to care for. The flowers can reach up to 4 feet high but other varieties only reach 1 foot high.
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56 – 63 days. Bright Lights cosmos seeds grow a playful, robust, and familiar annual sown among sunflowers and wildflowers. Bright Lights seeds grow hardy, drought tolerant cosmos shrubs as high as 36” tall with sunburst golden 2 – 3” daisy-like blooms. Bright Lights seeds are an ideal mound to highlight the back of the garden, fence, siding, or any wide open space. Bright Lights seeds promise long-lasting blooms that are a floral shop favorite used to brightly excite any seasonal fresh cut arrangement, basket, or bouquet.
Bright Lights cosmos seeds are popularly sown outdoors directly after the frost. But for earliest spring blooms, begin seeds indoors 6 – 8 weeks prior and harden off to a sunny place in the garden or decorative planter. Bright Lights cosmos is just as popular indoors as out. Germination will take 14 – 21 days in full lighting. Lightly press 4 – 6 Bright Lights cosmos seeds 24″ apart into average, medium dry, and well-drained soil in full sun. Bright Lights cosmos is a hardy full sun performer known to be low-maintenance and tolerant to heat and drought. Do not overwater because cosmos will suffer in overly saturated and poorly drained gardens. Plants may reseed for next season, but may do so too aggressively to the point where it becomes invasive. Bright Lights cosmos has no serious insects, pests, or diseases. Bright Lights cosmos seeds mature in 56 – 63 days as 36” tall mounded shrubs with a 12 – 24” spread of 2 – 3” daisy-like blooms.
Growing Bright Lights Cosmos Garden Seeds
Cosmos sulphureus, or more commonly known as just Cosmos, is native to the arid and warm climates of Mexico, but has since been naturalized throughout most of the world’s similar climates. Although not as aggressive as other varieties of cosmos, Cosmos sulphureus grows so effortlessly in the United States that it is still considered an invasive species in many counties along the lower half of the states.