Vetiver khus soil and climate suitability, growing on marginal and problem soils, how soil affects oil quality, planting slips.
2 Answers
Vetiver (khus) is remarkably adaptable and grows on a very wide range of soils, including marginal, problem and degraded land, which is part of its appeal. It tolerates poor, sandy, heavy, even somewhat saline or waterlogged-prone soils and a broad pH, handles drought once established, and its deep dense root system makes it excellent for bund stabilisation and erosion control. It is planted from slips (rooted tillers) and builds into clumps over the long growing period before root harvest. Importantly, soil and growing conditions strongly shape the oil quality and character: vetiver grown in different soils gives noticeably different khus oil, and buyers may prefer and pay more for particular profiles, so the conditions are not just about whether it grows but about what oil you end up with. Lighter, well drained soils are often easier to dig at harvest (a real consideration since roots are dug by hand) while heavier soils can make root harvesting much harder. Because oil character is soil-dependent, ask your oil buyer what profile they want and check whether your soil suits it, ideally with local KVK input. The crop grows almost anywhere, but match the soil to the oil quality your buyer pays for, and remember the long duration and labour-heavy root harvest when you plan.
It grew even on my poor patch where nothing else would. But digging roots from my heavy soil was brutal. If you can, lighter soil makes harvest far easier.