Maximum heights are listed above as some smaller cultivars will only be 6 inches tall. Provide a fertile soil and at least six hours of sun.
Marigolds hold up well during hot, summer days if watered properly.
Even large plants may be transplanted if enough of the root system is dug up. Too much watering may cause dwarf types to rot. Too much nitrogen or shade causes leafy plants with few flowers. Marigolds may be used as a dried flower. The seed germinates in one to two weeks at 70 to 75 degrees.