Do sunflowers come back every year? Try "Autumn Beauty" or "Inca Jewels;" both are annuals that grow rapidly to 8 feet tall and offer flowers in many rich tones. But, we found another way. Answer Save. If you don't catch them when they're small, they will climb anything they get near, even bushes and other perennials. Thankyou! A native of Mexico and southward, its area of origin is the reason for its common name. Your garden needs both annuals, that last one season, and perennials, which come back every year. Some varieties can grow up to 8 feet tall. Sunflowers are one of the few plants that you can pack dirt around the stem as it grows. Or, if something does come of them, it will not look like the plant you saw last year. Perennial sunflowers come up year after year… I was curious; if you plant sunflowers, will they come back the next year, or will you have to plant them again? Members of the daisy family, they are also related to the sunflower… Tithonia, along with sunflowers, are the largest, most dramatic annuals for the garden. Sunflowers are annuals meaning that they grow each and every year where they are planted. Prune very tall varieties of sunflowers in June or July. Now if these flowers were hybrids (most are) than you might have sterile seeds and not much will come of them. You can also sow several seeds close together and remove the … 10 years ago. If you’re growing sunflowers to harvest the seed heads, whether for human or animal consumption, don’t cut the heads until the green disk at the back of the flower has begun to turn yellow. Sunflower seeds average a germination rate of 75% so 3 out of every 4 should sprout. At this point, the seeds will mature properly if left on the head and kept in a dry, well-ventilated place. Sunflowers are annual plants, which means they don’t come back year after year. Most of the seedlings will appear in the first year after you let seed-bearing plants drop their seeds, with lower numbers popping up in subsequent seasons. They bloom one year then die. 0 0. cajundude1. Maximilian sunflowers (Helianthus maximiliani) and Mexican sunflowers (Tithonia diversifolia) should be trimmed in June or July.This will reduce the sunflowers’ size from their typical height of 9 feet (2.7 m) or greater to a much more manageable 4 feet (1.2 m). Relevance. Working with reseeding, or … So, what you gotta do is dig a trench & put your seeds in at the bottom. No, they are annuals. They will grow in cracks in the sidewalk, in flower beds, everywhere. Generally, sunflower seeds are sown 1-inch deep, spacing the seeds 6 to 36-inches apart, depending on the variety. It … Plant these hardy sun lovers for long-lasting color. Every single sunflower seedling that I’ve planted has produced beautiful blooms in the dead of summer.It’s one thing I really look forward to every spring. Anonymous. Unlike most flowers, humans can eat sunflowers. 6 Answers. So, the problem with mammoth sunflowers is they grow so fast that they end up falling over on their side almost 100% of the time..& I just refuse to stake them. Favorite Answer. The are an annual (needs to be planted every year for regrowth). I pull hands full of seedlings every week from morning glories that were planted and reseeded in 2008.