Did you know that pruning of the vetiver grass, at its right time works like a carbon bomb? Pruning of vetiver fences up to a height of 30 to 50 cm. Makes them thicker and consequently more effective in filtering runoff water and erosion. BTW vetiver has more than 1000 uses (construction materials, forage for livestock, landscaping and ornamentals, mulch, compost, veneer, fiber board, ash for concrete work, and insecticide).