Just a thought - Has anyone tried growing Brugmansia aka Angels' Trumpets?
They make ideal plants for the garden if you grow them in tubs of loam rich compost and feed and water them on a regular basis.
You can plant then in a border but they tend to get a bit unruly and overbearingly tall.
We've grown them in our garden in Bristol most summers for the past 25 years and in a good year they grow nearly 2m tall with dozens of flowers at a time from
July through to
October.
Because of the scent they give off, the bees and moths love them.
We cut them back in late
October and store the roots, in dry sand, in the conservatory but some years they die if they get too cold for too long.
Another way to preserve them is to cut the woody stems into 30cm lengths and stand them in a bucket with a 10cms of water in the bottom.
Even if the water freezes the stems still seem to survive and will sprout roots and new shoots in the spring.
Using a combination of these over-wintering methods we've kept the same four plants, yellow, peach, red and white going for many years, although a few years ago we lost them all when they fell foul to some sort of fungal infection.
Currently started two new plants off that we recently bought in our local UK Lidl for a fiver each.
Well worth a go in Fuerte gardens and on patios and balconies.