Cosmos bipinnatus Care

The plant requires regular watering during the growing season. During spring, make sure to water the plant once a week. Do not overwater the Cosmos plant because over-watering leads to the plant with fewer flowers.

The best thing that prolongs the growing season is deadheading. Shear the plant about one-third when the flower becomes faded, and it produces a flush of new flowers.

Mexican Aster doesn't require fertilizer. However, if they grow in pots, they require a small amount of fertilizer once a month.

Mexican Aster grows well in full sun sites. They will grow in partially shady areas, but they will have fewer blooms there.

The best one is light or neutral soil which has low to average fertility, and they prefer arid and sandy soil, which does not retain water well. Sandy soil is the best because soil rich in organic matter will cause spotty germination.

These flowers are self-seed plants, but they can either propagate by sowing seeds or another way through stem cutting.

The ideal range for Cosmos bipinnatus is around 59-77°F (15-25°C).

These flowers are best suited for growing in containers. The only condition for growing plants in a pot is that the pot should be 12.5 inches (30 cm) and have many drainage holes at the bottom. Heavy pots are highly preferred because they prevent the plant from toppling.

The plant can sometimes be referred to as Garden Cosmos and Cut-Leaf Cosmos.