That's what I've been wondering about... even a third planting might be appropriate. We've also thought about using huglekultur methods, even though the soil here is very volcanic and rich. Reason being, we get at least an inch of rainfall on most days. Some days it's more, and in the rainy season it's all but guaranteed. Plants suffer from root rot. We could put a canopy over the garden to deflect some of the rainfall or we could build raised beds in the style of huglekultur with extra emphasis placed on drainage and aeration. We'll just have to experiment and see.