Cosmos bipinnatus is native to scrub and meadowland in Mexico. They are also called as Mexican Aster. Cosmos are herbaceous perennial plants or annual plants. They need full Sun at leat 5 to 6 hours per day. Cosmos does not require perfect soil conditions as long as you water it regularly, but do not over water. Sandy soil is considered best for Cosmos. It needs neutral soil pH or slightly acidic. Cosmos plants can go upto 5 feet and they are not bothered by many pests. It is a good practice to cut of flowers that have finished blooming. Cosmos blooms throughout summer till winter sets in. Butterflies and bees get attracted towards cosmos blooms. Cosmos plants are grown from seeds and they need 7 to 14 days to germinate. Cosmos readily reseeds itself. Cosmos is referred to as a weed due to heavy seed production and self sowing. Cosmos is almost pests and disease free.
Common Name: Cosmos
Sun Exposure: Full Sun 8 hours/day
Max Height: 60 Inches
Propagation Methods: Seeds
Bloom Color : Red, Pink, Orange, Purple
Bloom Time: Summer to winter
Invasive potential: Cosmos bipinnatus is not invasive. Cosmos sulphureus is Invasive, See also Invasive and Noxious Plants , Invasive Plants of North America, Invasive Alien Plant Alert, Invasive Plants — A Horticultural Perspective
Pests and Diseases: Powdery Mildew, Bacterial Wilt, Canker-Diaporthe Stewartii, Powdery Mildew, Leaf Spots, Aphids, and Japanese beetles See Also Plants Pests and Diseases, Plant health in gardens, Plant pests and diseases
Natural Enemy: Aphids natural enemy, Aphids natural control, Japanese beetles natural enemy
Notice: The user of this information assumes all risks for personal injury or property damage.
Warning! Pesticides are poisonous. Read and follow all directions and safety precautions on labels. Handle carefully and store in original labeled containers out of the reach of children, pets, and livestock. Dispose of empty containers right away, in a safe manner and place. Do not contaminate forage, streams or ponds.
Remedy: Powdery Mildew – Benlate or Karathane, Bacterial Wilt-, Canker-Diaporthe Stewartii – Remove and Destroy all infected plants, Aphids-Malathion, Meta Systox R, Sevin Spray, Japanese beetles– Sevin, Diazinon, Methoxychlor, See also Plant Disease Diagnostic Clinic
USDA Hardiness: 1a to 13b
Attraction: Butterflies, Bees
Soil: Well drained and moist
Soil pH: 6.5 to 7.5. Soil pH: What it Means,Soil: understanding pH and testing soil, Soil PH