Suggestions for plants to provide privacy

Russian Vine is good but you need to be careful as it can become very invasive. Not a problem if you only want it for a year or two.

As an annual Cobaea scandens is a favourite of ours but it doesn't really get going until summer (being only an annual). Both you and the neighbour will love the flowers. Last year ours grew 15ft and is easily trained to run along the fence.

Also very fast growing is Humulus lupulus (the common hop)

Virginia Creeper.

Clematis armandii.

Clematis montana

Fast growing flowering annuals

Mina lobata - lovely flowers
Sweet Peas - of course
Canary Creeper
Black-eyed- Susan

 

When you start to train them along the fence you need to do as you see the need. They grow extremely quickly once started and their climbing feelers are very fine and grab extremely hard. That makes it difficult to remove them in order to move them elsewhere. They're the spiral bits in this picture.


It helps if you soak the seeds overnight before sowing them. They prefer a sunny position which should be OK for you as you say it's an open trellis.

You normally see the flowers as purple but when they first open they start off a very pale green and gradually change to purple. You don't need to deadhead them as the flowers drop off when finished and leave an attractive seed pod.

 

Some pictures I took last year

The colour they start off


And as they are growing

The pollinators love them








When the flower drops off the seed pod starts to form


And ends up like this




Unfortunately they almost never produce viable seeds as they tend to get rot inside because of the cold. These last photos were the end of November.