HOW TO GROW CALENDULA
– Plant family: Compositae.
– Leaves alternate, petiolate, oblong, spatulate, margins entire or with few teeth, and hairy.
– Large floral florets, 5 – 7cm. in diameter, composed of radiated flowers. It blooms from June to early November.
– Plant of temperate climates.
– Resistant to frost and drought.
– It grows in full sun or semi-shade.
– Located from 0 to 1,000 m.
Pot marigold flowers
– Type of soil: sandy loam soils, limestone or clay.
– It requires moist soil, even in summer.
– pH between 4.5 and 8.3. It can grow in acid and alkaline soils, but it prefers limestone.
– Provide a fertile soil rich in organic matter.
Photo of calendula plant
SEXUAL REPRODUCTION BY SEEDS
– Plant seeds in situ, in spring (March-April) or early fall (September-October).
– Germination occurs in 2-4 weeks.
– Flowering occurs four months after planting, in summer (if planted in spring) or between May and June if planted in autumn.
– The plant reproduces spontaneously.
– Flowers appear 4 weeks after sowing. Usually between April and October.
Calendula diseases and pests
– Mosaic Disease: caused by mosaic virus.
– Mildew: fungal disease that attacks in full force in summer, but that may appear in late spring.
– Powdery mildew: It is a common disease of plants. It appears in spring but its effects may linger during the summer or fall.
More information on calendula.