2019 Flower of the Year
I want to talk about a flower I fell in love with growing this year. It’s called Tithonia rotundifolia, commonly known as Mexican Sunflower or Rundblättrige Tithonie in German. There are many things about this plant that I love, but the main reason is that it’s easy to grow from seed and very forgiving, so beginner balcony growers take note!
Tithonia rotundifolia produce sturdy stems and have the ability to reach over 1.4-2m (4-6ft) in height, which is tall for a small balcony space but the wonderful thing about this plant is you can control its height by pinching out its growing tips to induce compact branching growth, much like basil, and grow them in a small sized container to restrict overall growth. Their leaves have a large beautiful triangular shape with a velvety soft touch. The flowers present sunny yellow disks with otherworldly electric orange petals that almost seems to glow. When fading, unfortunately we have to tolerate the less vibrant bright orange. Their flat upright facing blooms invite native bees and other insects to land on them and if deadheaded regularly, they will produce buds until frost. Collecting seed is also easy when a few flower heads are left to seed. Missouri Botanical Garden
I’m really excited to grow these plants again next year because I think they will make a beautiful shade screen on our hot south facing balcony. They were grown in balcony boxes with 15cm (6in) depth and grew 60-70 cm (24-27in). Next summer, they will be planted in a tall 60cm (24in) pallet pot to see if they’ll reach their full height. I tried growing tomato vines in the tall pallet pot in order to create a shaded section but they were too much of a hassle for our space.
They are, however, greedy plants requiring full sun, weekly/biweekly feeding, and daily watering when grown in containers. If forgotten for a day or two they will wither to the point of seeming lifeless but don’t worry, they will quickly forgive you once provided with water again, almost expanding before your eyes. Next year I’ll try growing some in the Kleingarten and imagine once planted out they will take care of themselves so long as they are not in a waterlogged area. Slugs will probably be the biggest problem.
If you need a back of the garden border plant or have 15l (4 gal) or larger container, give this beauty a try next season; it will not disappoint.