I popped mine into a corner of my raised veggie bed (12" deep, filled with Kellogs Raised Bed mix and amended with steer manure). They get organic ferts with macros, micros, and extra calcium about 2x/month when I feed the veggies and the tomatoes. The plant took off like crazy in there, began setting fruit when it only had an 8" spread, and I probably pick 50+ fruits per week now from the one plant. In the 3 months since sprouting the plant has already hit a 5' spread (mine sprawls on the ground and is not trellised). To harvest, I lift the vine off the ground, pick up the fallen fruits, and then husk and eat them right in the garden.
I've heard they do fine in poor soil and with minimal care, but it would seem that, like their relatives the tomatoes, giving them heaps of nitrogen, consistent water, and a steady supply of fertilizer will turn them into giant, productive monsters in no time.
I will probably put in 2 or 3 of them next year, as I really like the little fruits, and despite the rapid growth it's been pretty well behaved amongst the peppers and eggplants, not choking anything out or overrunning its neighbors.
I will also mention that of all the plants in my raised beds, the cape gooseberries/ground cherries are the least bothered by pest insects. That plant has handled drenching rainstorms and two extreme heat waves, and hasn't flinched or slowed flowering for anything.