The aim is to restore 2m hectares to the dispossessed over the next four years.
Botanical gardens may range in size from a few hectares to as many as 1,000.
"Giving tens of thousands of hectares to large-scale investors was hurting small-scale farmers," said LARRRI executive director Yefred Myenzi.
Worst of all is the shift towards growing maize, whose cultivated area in this country has risen from 1,400 hectares to 160,000 since 1970.
He calculates that there is enough green belt land within Greater London – 32,500 hectares – to build 1.6m houses at average densities.
The city could improve water quality and reduce treatment costs by working with farmers on just 1,000 hectares to reduce field nutrient runoff.
Last year, the government cancelled the contracts and sold all but nine hectares to oligarchs and businessmen, who ordered the destruction of the organic bounty.
Now, only three mountains are topped with ice, and the area covered by ice has plummeted from 650 hectares to 148 hectares.
Once the old state farm is watered, he wants to expand to at least 250,000 hectares, to grow sunflowers and maize.
By executive orders and court action he succeeded in restoring more than 81,000,000 acres (33,000,000 hectares) to the public domain.
The property, complete with a number of olive trees, covers nearly 5 hectares (about 12 acres at 0.4 hectares to the acre), with hilly and level areas.
