Cosmos Antiquity Scientific Name : Cosmos bipinnatus
Blooming Season : Spring, Late Spring, Summer, Autumn, Late Summer
Plant Habit : Upright
Spacing : 12 – 14″ (30 – 36cm)
Height : 20 – 30″ (51 – 76cm)
Width : 12 – 14″ (30 – 36cm)
Exposure : Sun
Grower Information :
Seed supplied as: Raw.
Plug crop time: 4 to 5 weeks
Transplant to finish: 6 to 7 weeks
- 2-in./5-cm flowers open rich burgundy and mature to antique bronze-salmon.
- Very early and floriferous.
- Well-suited to 3.5 to 4-in./9 to 10-cm pots.
- Just sow seeds lightly—about ¼-inch deep and 12–18 inches apart after the danger of frost has passed. You can also plant transplants instead of seeds.
- Cosmos don’t need any special soil preparation. In fact, they like soil that is not too rich, as rich soil will encourage foliage at the expense of bloom.
- Cosmos flowers can tolerate warm, dry weather. They are even drought-tolerant.
- Depending on the type of flower, cosmos can grow anywhere between 18 to 60 inches tall.
- If you are growing cosmos from seeds, be mindful that it takes about 7 weeks to first bloom. After that, though, your flowers should continue to bloom until the next frost.
- If you want a head start, you can plant cosmos indoors 4 to 6 weeks before the last spring frost in trays or pots with a good seed-starting mixture. Move them into 5-inch pots as soon as they’re 3 or 4 inches tall.
- If you let the spiky-brown seed heads blow away during the fall, cosmos might self-sow throughout your garden.
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