Height: 12-25 ft.
Head Type: single-head
Head Diameter: up to 20+
Days to Maturity: 120+ (longest growing period)
Description: This is the best variety to go for the world record. This variety is a cross between the Heijms world record seed, and a large, black shelled variety from Markham, Ontario.
Where can I find this variety? This variety can be found exclusively at P&P World Record Seeds.
Personal Experience:
Originally grown by Norm Craven of Canada, this sunflower has the largest growth potential of any of the sunflowers I've grown. It has a growing season longer than any other variety on the market. It was the first sunflower I planted, but the last to flower. If you are serious about breaking records for height then this is the variety for you. It has an incredible girth, with a stem base circumfrence on my 12 foot plant reaching 10 inches. I've seen leaves on these plants exceed 2 feet in length and nearly as wide. I've had heads grow over 20 inches in diameter. The plants have a tendancy to have quite a bit of splitting on the main stem from rapid growth, but with no seemingly harmful effects.
