The soil mixture for roof garden should be prepared by mixing equal parts of garden soil and cow dung manure.
Leaf mould should be a welcome alternative to cow dung for its light weight and fluffy nature.
Layout of the garden should be delineated on the roof with powdered lime, and the soil mixture should be spread 15-20 cm thick, leaving the paths lined with bricks.
Bricks should be held together through cementing.
A gap of 5 mm between two bricks should be left approximately at every 50 cm length to act as drainage hole.
The soil mixture of the beds should be held back from draining out through these holes by spreading a double layer of close-knit nylon screen along the inner side of the brick lining.
One kilogramme of oil cake, preferably from neem (Azadirachta indica) , mahua (Madhuca latifolia) or karaj (pongamia pinnata) seeds, one kilogramme of bonemeal and 0.05 m 3 of small charcoal bits should be worked in every 10 m2 of the newly prepared beds.
The pH of the soil mixture should be maintained between 6.2 and 6.8.
Last modified: Tuesday, 13 December 2011, 12:01 PM
