4 plants per square foot in 2 rows 15 cm (6″) apart. Can grow to 45-60 cm (18-24″).
6 mm (¼”)
Enjoys full sun but will tolerate part shade. Will thrive in a rock garden. pH 5.5-7
Seeds will sprout in 7-14 days
Calendula is highly resistant and will attract butterflies.
Sow indoors in March for outdoor planting in April. Maintain darkness until germination occurs. Or direct sow in the garden before the last frost.
Calendula is easy to grow and maintain. Pinch back young plants to encourage bushier foliage.
Start in mid summer, for 16 weeks
Interesting short video discussing the healing properties of calendula. Further references are given for instructions on how to make preparations.