Soils and Climatic needs
High fertile well-drained loamy soils are preferable. Soils should be rich in organic matter
Altitude – Vanilla performs well up to 1000m above the mean sea level.
Temperature – 21-32 0C is suitable. But Vanilla performs well at 27 0C
Rainfall – 2000-2500 mm. But 2-3 months dry spell is needed for flower initiation.
Vegetative methods are practiced. Cuttings, 3’-4.5’ (1-1.5m) in size, are obtained from selected mother vines. The lower end of the cuttings should be closer to the node and 3-4 leaves should be removed from the lower end. To induce buds cuttings should be hanged on a support for about 7 days.
Vanilla is a shade loving plant hence live support trees are used to provide adequate shade (50-60%). Gliricidia is the most suitable shade tree and support trees should be established at least six months before planting vanilla.
Spacing – 3m x 1.5 m (10’ x 5’) (2000 cuttings / ha)
Planting should be done with the onset of rain. Loosen the soil around the base of support up to 8’’ deep in an area of about 2’ in diameter. Then add a 2-3 basket of organic manure. Make a furrow 10 (4’’) deep (from support tree and across the surface of planting pit.) and place the cutting horizontally in the furrow leaving 3 cm from lower cut end jutting out into the air. Cuttings should be buried firmly with upturned soil. The upper end of the cutting is tied up on to the support tree and mulching should be done up to the thickness of 7.5 – 15 cm using decayed organic matter.
Training of vines
When cuttings start to grow emerging axial buds should be trained to turn vines to grow upward direction. When vines reach the top of the support tree they should be allowed to droop. When reached to ground let them grow on soil further 30 -45 cm (1-1.5’) and then curl the stem upwards and allow the buds to grow up again on the support tree. This process should be repeated until vines form several loops. Ground area of loops should be covered with organic manure.
To get the maximum number of flowers flowering should be induced artificially. Usually, this practice is done in January. For that 5-7 nodes are removed from the tip of drooped matured branches. To get 70-80% sunlight shade trees too should be pruned.
Usually, artificial fertilizer is not applied to vanilla but organic fertilizer is essential. Compost should be applied at the beginning of each rainy season. Plants should be mulched at least once in six months with dry or fresh leaves and lopping of shade trees.
In vanilla artificial pollination is essential as the natural pollination rarely produce pods. The flower is self-fertile, but incapable of self-pollination without the aid of an outside agency to either transfer the pollen from the anther to the stigma or to lift the flap or rostellum and press the anther against the stigma. Usually, flowers come out in April-/ May period and flowers are small lily-like, greenish-yellow in color. There are about 20 flowers in a raceme. Usually, only one flower in a raceme opens in a day, with the entire flowering period of the raceme lasting an average of 24 days. The flower opens in the morning and closes in the afternoon, never to re-open. If it is not pollinated, it will shed the next day. The optimum time for pollination is in mid-morning.
Harvesting and Post Harvest practices
Pods reach maturity after 8-9 months from pollination. Harvesting mainly falls in December- January. The ideal stage is when the tip of the green pods start turning yellow and before split opened of the lower end of pods. In harvesting, only mature pods should be e harvested. To make one kg of pods 70 -100 well-ripened pods are needed and 6 kg of raw pods are needed to make 1kg of cured pods. Pods must at least be longer than 6cm and better quality pods must be longer than 10cm. To get quality bulk of pods small pods ( Less than 10 cm long) should be removed from the plants 2 months after pollination and allow only 8-10 pods in a bunch and remove all other pods. Pods should be plucked by turning upright and should not be used a pair of scissors or knife to avoid fungus formed in cut end.
Yield – After 3 years of planting 500 – 800 kg/ha and peak yield level at 8years
There are several methods of processing but the basic steps in each and every method are the same. Those steps are
The aroma and flavor of the cured vanilla bean/pod are the characteristics that determine the bean’s commercial value on the world market. Processing should be done carefully to preserve the maximum aroma and flavor as well as the physical appearance. Once the mature vanilla beans have been picked, they are taken to the curing and sorted according to size and condition. Sorted beans are plunged into large vats of hot water (63 degrees Celsius) and quickly drained. The warm beans are wrapped in dark-colored cotton fabric and after a day they are laid on slatted platforms to dry in the open sun for an hour. For about a week, the beans are left for two hours a day to dry in the sun and rolled in cloth between drying session. At this stage, the vanilla beans have become quite supple. For the next two or three months, the vanilla beans are spread on racks in the shade or in well-ventilated rooms to allow their full flavor and fragrance to develop. After the curing process, vanilla beans are sorted in an open airy place and graded according to length before they are bundled for shipment. By this time, their aroma is quite remarkable.
Standard quality specifications
Length of pods – between 17-25cm
Smell – Inherited vanilla smell
Color – Dark brown or black color
Appearance – Shiny oily surface
Lack of insect attacks or other patches
Cleanness – Lack of extraneous matter, animal o plant parts or insects
Moisture – around 25%-30%
Medicinal and Chemical Properties
Though there are many compounds presents in the extracts of vanilla, Vanillin (4-hydroxy-3-methoxybenzaldehyde) is primarily responsible for the characteristic flavor and smell of vanilla. However, there are hundreds of minor compounds in vanilla extract.
මපස / පාදු / ප්රාලේ / 2509
CPC / MI / DI / 07/052017 / IR007 of the Central Province
PV 75417/ 2010.11.10