Cucumber Seeds - Burpee II Hybrid60 days. Burpee II Hybrid cucumber seeds is a large variety of cucumber that is sweet and tender. The Burpee II Hybrid is green and smooth, and grows to be eight inches long. Since this variety is mature in sixty days, a steady harvest can be achieved by planting regularly throughout the season. Adorned with dark green foliage and white striped fruits about 8 inches long by 2 inch wide, this vine plant is ideal for most garden growers. These cucumbers