How to plant cosmos. Sow seed in early spring directly into the soil where you want your cosmos to grow, or into small pots or modules filled with free-draining seed compost. If growing in pots, pot on seedlings when they are large enough to handle. Plant out in late April/May after the danger of frost has passed.
Jun 3, 2021
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Apr 15, 2024 · Just sow seeds lightly—no more than 1/4-inch deep. Thin to 12–18 inches apart when seedlings are a few inches tall. Depending on the variety, ...
Apr 27, 2022 · Cosmos are freely flowering annuals that are easy to grow by sprinkling some seeds in the garden after any danger of frost has passed.
Dec 25, 2023 · You might as well save yourself some time and space, and simply direct sow the seeds! Transplants/seeds should be spaced at about 12” apart.
Light: Cosmos prefer full sun conditions, except in extreme heat where they can tolerate part shade. Soil: Prepare the garden with loose, weed-free soil.