I intend to over winter my Cosmos atrosanguineus Chocamocha tubers. They have flowered beautifully over summer and as the specimens I bought were not cheap I'd…
They will thrive in rich, moist well drained soil. If grown in full sun they will produce more flowers.
You can propagate the half-hardy species by basal cuttings in the spring, the annuals by seed in the autumn or spring.
Pests, diseases or disorders
Aphids, slugs and grey mould may be troublesome.