The genus Tunbergia has about 200 species tropical vines... They can't stand our harsh winters, they freeze out, therefore cultivation of tunbergia in the garden is possible only as an annual. In Europe, this flower is called "Black Eyed Suzanne"because of the black center of the flowers. The flowers themselves can be yellow, cream or orange in color. The triangular tunbergia leaves are covered with soft hairs and are pleasant to the touch.
Tunbergia cultivation begins in late February or early March. It is sown in seedling boxes, which need to be kept warm. Seedlings appear at a temperature of 22-24 degrees. The seeds do not germinate well, so they need to be planted more, and before planting they should be treated with biostimulants, for example, "Epin" or "Fumar". When the seedlings get stronger, grow up to 20 cm in height and release 3-4 real leaves, they make a support, and pinch the stem for more branching.
When the ground warms up and the threat of night frosts has passed, the seedlings are planted in the ground, leaving a distance of 30 cm between them. Since tunbergia is a tropical plant, it needs bright sunny place, sheltered from the winds. It blooms especially well on calcareous soils. The plant does not tolerate drought at all, it needs regular watering and feeding. Mineral fertilizers should be applied twice a month. With proper care, Tunbergia will delight you with long and abundant flowering.