![]() With consecutive plantings, you will have beautiful Sunflower blooms right up until the first frost of fall. You can enjoy continuous blooms through summer by planting Sunflower seeds every couple of weeks. Indoor germination happens in 6 to 10 days. A soilless planting media will give you the best drainage system. To start Sunflowers indoors, plant 3 seeds per each 3- to 4-inch peat pot. Growing Sunflower seeds requires some space. If soil temperatures are just right, Sunflower seedlings will sprout up in about 10 to 14 days. Plants must be thinned out in a few weeks to the proper spacing. If planting in rows, you’ll want about 2 to 3 feet between each row. In general, plant seeds at least 1/2 inch deep. How to grow Sunflowers from seed and how deep to plant Sunflower seeds depends on specific Sunflower cultivar. How to plant Sunflower seeds Plant the Seedsĭifferent Sunflowers need different planting depths and spacing. Germination occurs from mid-April to late-May, depending on when you plant your seeds. The shoot is looking for sunlight because all plants require sunlight to grow. During germination, plant roots will develop from the seed and a shoot will push through the surface of the soil. Once you plant Sunflower seeds, the germination phase of the flower’s life cycle will begin. Outdoors, thinning small varieties to 6 inches apart and large varieties to about 3 feet apart allows ample light and airflow around Sunflower seedlings. The plants grown indoors in pots, the plastic wrap is removed at the first sign of germination and the uncovered pots are located in bright, indirect light. Sunflower seeds do not need light for germination. You can also check the Management of Plant Bacterial Diseases and Control. Indoors, where the growing environment can be more closely controlled, germination often takes place in 6 to 10 days. The Sunflower seeds will sprout in 10 to 14 days outdoors. ![]() Indoors, a heating mat under the pots can raise the soil temperature to at least 21☌. Outdoor planting time is several weeks after the last spring frost when the soil has warmed thoroughly. Sunflowers germinate best at a soil temperature of 21 to 29☌. The seed rate is 8 to 10kg of well-filled seeds per hectare. The seed rate is the number of seeds planted per hectare (ha) to ensure a normal density of sprouts and a maximum crop yield. ![]() Then, place the Sunflower seeds at a depth of 3 cm along the furrows in which the fertilizer mixture is placed and cover with soil. Cover and keep watered until Sunflower seeds sprout in 7 to 10 days. Space Sunflower seeds about 6 inches apart in a shallow trench between 1 and 2 inches deep. The spacing of Sunflower seeds or plant to plant distance of sunflower You should not miss the Basic Steps of Organic Farming. Make sure you water the newly planted Sunflower seeds. Make sure you put the seeds carefully in the ground and cover the seed with soil. If you are thinking of sowing Sunflower seeds directly in the soil you will want to do this in mid-April.
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