In a wild state V. fragrans usually grows climbing on trees in wet tropical lowland forests from sea-level to 600 meters. It thrives best in hot, moist, insular climate, with frequent, but not excessive rain. Regions with a prolonged dry season should be avoided. SOIL The most suitable land for vanilla is gently sloping with light friable soil, adequate but not excessive drainage, and a thick surface layer of humus or mulch in which the roots can spread.
Excessive water is harmful.
Partial shade is necessary and this is usually provided by the shrubs or small trees upon which the vines are grown.