Windy conditions cause blossoms to fall and prolonged wet conditions create problems with pollination.

Passionfruit are gross feeders - extra cultivation may help in fruit production.

Preparation before planting is most important - dig in cow manure, all-purpose plant food and sulphate of potash.

This recipe can be repeated after pruning and several months into the growing season.

If your vine is all growth and no fruit it is caused by a high nitrogen content, which can cause a deficiency of phosphorus, which is essential for productivity.

This problem can be helped by pruning.

Prune back a few vigorous laterals and some of the main growth to a lesser side branch.

It is important to feed with a fruiting fertiliser after pruning.

When the weather isn't so varied, pruning does help fruiting - weak laterals should be removed as cluttered growth will discourage fruiting.

Established vines should be pruned during September, when frosts have finished.