How do you plant Maximilian sunflowers?

Planting Maximilian Sunflower. Maximilian sunflower seeds can be sown either in the fall, or in the spring after the last frost. (Get seeds here.) To start seeds indoors, they will first need to be cold stratified, which means the seeds need a period of cold to germinate.Click to see full answer. Moreover, how do you care for Maximilian sunflowers? How to Care for a Maximillian Sunflower Provide Maximilian sunflowers with about 1 inch of water every week during spring and summer. Fertilize the plant only if your soil is poor or growth appears stunted, as sunflowers generally require no fertilizer. Pinch about 1 inch from the tips of stems to promote bushy growth with multiple branches and more blooms. One may also ask, how do you grow perennial sunflowers? Sun Exposure: Perennial Helianthus will bloom best in full sun, although they can handle partial shade. Without at least five hours of sun per day, the plants will tend to get leggy and flop. Mature Size: Height varies greatly by species and by growing conditions. Similarly one may ask, is Maximilian sunflower invasive? They grow anywhere but they need sun and decent soil to get tall and to flower, which is the point. They are invasive in any soil so don’t plant them unless you want them and are prepared to put down 12″ edging.Are all sunflowers perennials?Seed heads – Annual sunflowers can have either large or small seed heads, but perennial sunflowers have only small seed heads. Blooms – Annual sunflowers will bloom the first year after being planted from seeds, but perennial sunflowers grown from seed will not bloom for at least two years.