The Marigold Flower Height. Their large flowerheads can reach up to 5 inches across are densely double and pompon-like. Marigold cultivars in this group grow 5 inches to 18 inches highFlower colors are red orange and yellow.
22112020 African marigolds have larger flower heads on plants that grow from 10 to 36 inches tall. This plant has an average height of eight to ten inches. The signet Marigolds produce single-flowered marigold grow up to 12 inch high producing small richly colored yellow to orange colored edible flowers.
12012016 Tagetes tenuifolia Signet Marigolds.
Flowers may measure up to 5 inches across. Marigolds are roughly divided into four categories. The roots of the Marigold flower grows deep in the ground and the plant goes up to 80 cm in height. 22112020 African marigolds have larger flower heads on plants that grow from 10 to 36 inches tall.