Up for sale is one pack of 20 ProCut White Nite Sunflower seeds. These sunflowers are pollenless single stem 6" flower heads with white petals and a darker brown center. Perfect for cut flowers with a very long vase life. They can grow a maximum to 60" but in our test garden all of our Procut sunflowers grow to about 36". CULTURE Soil temperature: 70 - 75 degrees fahrenheit Germination lighting: Dark required Germination days: 4 - 8 days Grow on temperature day: 55 - 60 degrees fahrenheit Plant spread: 6 - 12 inches Plant height: Max 60'' Plant type: annual Maturation days: 50 days Loosen enriched garden soil down to a 6" depth. When soil is consistently 70 degrees (for zone 6-7 usually June 1st) plant seed 1/2" deep and a minimum of 6" apart. These are low maintenance and require nothing else other than weekly watering. Don't pinch like branching sunflowers as they are single stem. You can sow these sunflowers through late summer. We don't recommend you start sunflowers early in pots as they send a large tap root when germinating and in pots less than 6" deep will quickly become rootbound and not develop correctly. The color of these sunflowers, and the overall vigor of the plant, is very dependent on sufficient soil nutrient levels. To achieve the brightest color we suggest you use a nutrient soil test to check your NPK and make sure your PH level is at least 7. A PH level under 6 will affect the color of the bloom.