Bidens reptans

Garden cosmos require a generous amount of sunlight each day, which affects their health and vigorous growth. This need lessens somewhat as the plant matures, but ample light is still preferable. They originate from sun-intensive habitats. Excess exposure can cause scorching, while insufficient exposure can result in weak, leggy growth.

Garden cosmos is native to temperate regions and is adapted to temperatures between 68 and 100°F (20 to 38℃). It prefers warmer conditions for optimal growth. Adjust its environment seasonally to keep it within this temperature range so it can flourish.

Once Garden cosmos has opened most of its blooms to full size, it's time to resume fertilizing. Around the point when blooms are at peak production, begin applying fertilizer every three to four weeks, weather permitting. Then, when Garden cosmos starts producing fewer new blooms, stop fertilizing; there's no need to feed the plant when it can no longer produce additional blooms.

When repotting Garden cosmos, choose a pot 1–2 inches (2.5–5.1 cm) larger in diameter that has good drainage. Use a well-draining potting mix and consider adding perlite for extra drainage. Repot in spring or early summer, water thoroughly afterward, and initially place it in a shady location.