earest G.P.R sir
Yes you are right ..The general practice is that people plant Drumstick in July - August and it comes to flowering in February -March in about 6-7 months after planting ..It receives rainfall in both monsoon rain say South West and North east Monsoon and just before flowering the drumstick undergoes vernalization process ( passing through low temperature during winter between Mid of December to mid of February for about 2 months ) .This natural chilling process induce flowers .
The February -March planted drumstick comes to flowering in September-November in about 6-7 month .Here when the drumstick is due to flower , the reduction in temperature is also significantly low due to crossing of sun that goes south of Equator .However the atmospheric humidity that is more compared to July-August planted drumstick that comes to flowering in February- May when atmospheric humidity is low , cause flower dropping by 40 % and delayed pollination ..
Because flowering in drumstick is purely temperature regulated ..
Also our location is falling in semi arid tropical climate with annual average rainfall of around 650 mm with total rainy days of around 45 days ..
so based on the prevailing weather , we can manipulate drumstick to induce flowers through appropriate pruning and PGR treatment that may convert vegetative growth into flowering branches ..
More important I am designing planting schedule with specific reference to our field location forgetting about general cultivation schedule in other areas ..
Our plan is to grow drumstick through out the year through staggered planting ..