After almost 7 weeks, now flowering..
Flowers & Pollinating :
Cucumber plants have both male and female flowers, but only the female flowers will produce fruit. However, in order to do so, they must be pollinated by pollen from the male flower. This important transfer is usually conducted by bees, but the gardener can increase the quantity of fruit by carrying out some judicious hand pollination. The female flowers are easy to identify because each has a tiny cucumber at the base. Use a small brush to remove some of the pollen from the male flower and gently brush it onto the centre of the female flower.