How to Grow Cosmos: Master Sowing and Care Techniques for a Sea of Flowers

Cosmos is an annual herbaceous flowering plant, also known as autumn cosmos. Its flowers resemble small daisies and commonly come in pink, white, and purplish red. With light, delicate petals and slender stems, it looks especially striking when planted in masses, and it is often used to create seas of flowers.

Cosmos is mainly grown from seed, which can be sown after temperatures warm up in spring; seedlings usually sprout about a week after sowing. The seeds are tiny, so they can be scattered over loose, well-drained soil, covered with a thin layer of soil, and kept slightly moist. After the seedlings emerge, thin them appropriately and keep the sturdy ones, which will grow better later on.

For routine care, cosmos likes a sunny environment; insufficient light tends to cause leggy growth and fewer blooms. It is drought-tolerant and hates waterlogging, so there is no need to water too often; just water once the soil has dried out completely. It has low fertility requirements, and overly rich soil instead tends to cause rampant leafy growth and fewer flowers, while slightly poor soil often produces better blooming.

Cosmos has a long flowering period, generally lasting from May to October, and with proper care it can bloom twice a year. Pinching the growing tips appropriately during the growing season encourages branching, giving a fuller plant shape and more flowers. Its stems are rather thin, and plants that grow too tall are prone to lodging, which can be prevented by controlling water and fertilizer, pinching in time, or setting up supports.

After sowing, flowers generally appear in about two to three months, and they can be enjoyed continuously from summer to autumn. In addition, many people habitually call cosmos "Gesang flowers," and the two are often referred to interchangeably. In fact, Gesang flower is more of a general term; the two are similar in form, and their growing methods are much the same.