Calendulas are an annual flower known for being in constant bloom throughout the growing season. They were once grown as a seasoning and a medicine but are now grown for their cheerful, yellow flowers. The flowers follow the path of the sun throughout the day, turning to face it just like sunflowers.
Choose a spot to plant calendula that is in full sun in regular garden soil, anywhere you are growing flowers, vegetables or herbs. They are not fussy about the type of soil they grow in, as long as it doesn't stay soggy after a rainstorm.
Plant calendula seeds in mid spring one-fourth to one-half inch deep and four to six inches apart.
Water the seedbed after planting and mist daily to keep it moist until the seeds germinate in seven to 14 days.
Water as needed to keep the soil moist but not soaking wet.
When the seedlings are about three inches high, thin them so that they stand eight to 12 inches apart.
Spread a thin layer of compost around them in midsummer. This is all the fertilizer they need to continue blooming throughout the growing season.
Cut off faded flowers to encourage the plants to produce more blooms.
Calendula will survive light frosts and will keep blooming until killed by a hard freeze. They are often one of the last annual flowers still blooming in late fall.