When To Harvest Cape Gooseberries . Some fruit will fall to the ground, and if still in the husk, it will remain edible up to several days. In a saucepan, combine 200g cape gooseberries and 1 tablespoon sugar. Growing Cape Gooseberry Cape gooseberry, Gooseberry, How to grow from www.pinterest.com Cape gooseberries’ branches and stems can grow large and bushy. Sow seed at a depth approximately three times the diameter of the seed. When it does, it will produce fruit for up to three years, but after the first year, the fruit is usually smaller.