This is the most important tip: genetics matter! Gently push the sunflower seed into the soil. Also calculate post-harvesting cost like storage, bagging, etc. How to Plant Sunflowers: Place the sunflower seed in the ground. Sunflowers (Helianthus annuus) grow up to 8 feet tall with some cultivars reaching heights of 15 feet. That’s why grass may die beneath your sunflower birdfeeder. Sunflower leaves, stems and seeds release substances that inhibit the growth of certain plants. Fix your sunflower farming budget. Cover the sunflower seed with dirt. To ensure pure seed, grow your sunflowers at least 1/2 mile from any sunflowers grown by your neighbors. The Best Time to Plant Sunflower Seeds. While saving sunflower seeds as a snack or as bird feed is common, you can also save the seed for replanting the next year. This is from mid-April to late May in the Northern United States. If drilling, plant approximately 20 pounds per acre. These annual plants are tall, with a height of 8 to 15 feet. Plant the seeds no more than 1 inch deep and 6 inches apart. Sunflowers seeds run approximately $25 per 10 pounds of seed. Always hoard a small number of the sunflower seeds that you’re setting out. Conventional wisdom says that the seeds should be either direct seeded after danger of frost, or, in short season regions, started in pots a few weeks earlier, for later transplanting. Most sunflower varieties need 95-110 frost-free days to produce mature seeds, which means they can grow in zone 5 and warmer. You can plant sunflower seeds directly into the ground after the danger of Spring frost has passed and the soil is thoroughly warmed (soil temperature of 55 to 60 degrees F). Sunflower seed heads make plants top-heavy and easily toppled with strong winds. Calculate the expenses of seed, fertilizer, nutrients, pesticides and labor costs. Below is a photo collage of my mother showing us exactly how to plant a sunflower seed directly into the ground with her experienced gardening hands. The seeds are usually ready for harvest 30 to 45 days after the flower opens, but that depends a lot on the weather. 1 Choose the Right Seed. Slow down plants. Press down firmly. A plant population around 50,000 to 75,000 plants per hectare is considered as the best suitable for producing maximum depending on the water availability and sunflower cultivar. First, fix the land area where you will grow a sunflower. Determining when sunflower seeds are ready for harvest can be tricky. Harvesting Sunflower Seeds. The sunflower (Helianthus annuus) grows well in U.S. Department of Agriculture plant hardiness zones 1 through 11. Step 2 — Plant Sunflower Seeds. These toxins are harmless to people and eventually break down in soil. Don’t plant too thick, as too many plants will grow and competition will result in a lesser plot. Sunflowers can be sown directly into the ground. Sunflower Farming Business Plan. Forget the dwarf varieties (which do great in containers), and look for types with words like giant, mammoth, kong, tall, monster, and so on in the either the seed name or description. If broadcasting, plant about 25 pounds per acre. Contact with the potential buyer of sunflower seed in your locality. The plant produces a large head of seeds that can be saved for planting the following season or … Planting sunflower seeds. Also, a proper seed treatment is to be carried out for better germination of sunflower seeds So, that you can achieve a good plant density. Once the flower opens, it’ll be a long time before everything has been pollinated and seeds fully develop. You have to start with a variety of sunflower that can grow tall. Plant seeds and then use a cultipacker to put them at the appropriate depth. 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