The yield from your passion fruit plants will gradually drop with time. If the vines have been standing for at least three years, you are likely to see a drastic drop in the yield of your passion fruit plants and it is therefore advisable to replant them after this duration.
This drastic drop in the yield will most likely occur in the regions with punishing climates or where there is a high incidence of the diseases and pests that affect passionfruit plants. Over time, that vigorous growth and harvest is stunted and the plant is unable to hit its previous yields even if you apply fertilisers.
If you are not ready to replant, you can also apply some good crop husbandry in order to boost the yield of passion fruit vines. For example, make sure that you prune off the old and unproductive dead wood and shoots on the passion fruit vines. Remove all the secondary shoots that touch the ground and make sure you offer the passion fruit plant’s laterals excellent support through the trellis. It is these parts that bear the fruit and if they are not adequately supported, your yield is going to suffer.
When pruning your passion fruit vines, wash your hands with a disinfectant and make sure that the equipment or tools that you are using to prune off the plant is also disinfected. This will prevent the spread of diseases through all your passion fruit plants.
It is also advisable to apply fertilizers on a regular basis but don’t overdo. Add some compost at the root of the passion fruit plants. These not only retain the moisture but the organic matter also nourishes the passion fruit plant. You can also apply the foliar feed sprays every month after you have planted the passion fruit plant. Continue applying this for at least three months.
Finally, apply some fungicides on your passion fruit plants to kill off most of the fungal diseases that are likely to stunt the growth of your passion fruit plants and your yields. This will also forestall any future fungal disease outbreaks.
Get more passion fruit farming tips via our Passion Fruit Farming Handbook.