Two Crops a year is one of the characteristics of Atlantean agriculture according to Plato (Critias 118e).
The North African climate was slightly wetter at the time of Hannibal (2nd & 3rd cent. BC), later, Algeria, Egypt and particularly Tunisia, were the ‘breadbasket’ of Rome(b) and may also have been so for the Atlanteans who earlier had control from North Africa to Tyrrhenia! Even today well-irrigated plains in Tunisia can produce two crops a year, usually planted with the autumnal rains and harvested in the early spring and again planted in the spring and harvested in late summer. The Berbers of Morocco produce two crops a year—cereals in winter and vegetables in summer(a).
*It is worth noting that Mago, the Carthaginian author of a 28-book work on the agricultural practices of North Africa. had his books brought to Rome after the destruction of Carthage in 146 BC, where they were translated from Punic into Latin and Greek and were widely quoted. It is clear that Mago’s work was a reflection of a highly developed agricultural society in that region, a description that could also be applied to Plato’s Atlantis!*
Although two crops are possible annually in other parts of the world, I must emphasise that North Africa is the only part of the Atlantean territory referred to by Plato (Timaeus 25b) that was so productive and continued to be so until the Romans, who depended on it along with Egypt to feed Rome.