Cosmos Mandarin Scientific Name : Cosmos sulphureus
Blooming Season : Summer, Autumn, Spring, Late Spring
Plant Habit : Upright
Spacing : 8 – 10″ (20 – 25cm)
Height : 10 – 12″ (25 – 30cm)
Width : 6 – 8″ (15 – 20cm)
Exposure : Sun, Partial Sun
Grower Information :
Seed supplied as: Raw.
Plug crop time: 3 to 4 weeks
Transplant to finish: 5 to 7 weeks
- Mandarin has a deeper orange colour, a better habit and is more uniform compared to competing varieties.
- Slightly more compact variety has a more mounded shape.
- 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.