PlotPal

Cosmos

Cosmos is listed botanically as Cosmos bipinnatus. It may also be listed as mexican aster, annual cosmos, Garden cosmos. Airy, fast-growing annual with feathery foliage and daisy-like flowers that bloom for weeks in summer. Cosmos is easy from seed, tolerates lean soil, and attracts bees and other pollinators. PlotPal's canonical care record lists full sun and lower water needs. The current taxonomy reference places it in the genus Cosmos and in the family Asteraceae. Its source-backed growth habit is listed as forb/herb. PlotPal currently carries Cosmos as an outdoor growing and flower reference. Growing note: Direct sow after frost in full sun and avoid overfeeding, which can produce lots of foliage with fewer flowers. Water young plants while they establish, then let the soil dry somewhat between waterings. Deadhead to extend bloom or leave some seed heads for self-sowing and birds. Propagation or sowing note: Direct seed outdoors after frost Plant-health prevention note: Give plants full sun and generous airflow, avoid heavy nitrogen feeding, and remove plants showing severe aster yellows symptoms. Pest-prevention note: Inspect tender new growth, encourage beneficial insects, and use a firm water spray to dislodge small aphid colonies. The current reference lists an average harvest time of about 70 days, where harvest timing applies. Common pests in the reference include Aphids, Spider mites, Thrips. Common plant-health issues in the reference include Powdery mildew, Aster yellows, Stem rot. Use this guide as practical growing context, then adjust decisions to the actual weather, soil, container or bed, variety, and conditions in your garden.